Working in the gas turbine industry. You may want to put a small shield around the rotating hardware. Because, I really want to see more of these and that would be hard without the guys that did it. Awesome video guys.
I was thinking to myself I don't know how they didn't do the iconic "have I been shot" torso pat down. Because that was a lot of kinetic energy those pieces of metal flying apart had.
You need to have two-stage combustion (i.e. gasifier-combustor) to avoid throwing hot char into the turbo that will damage it in minutes. Even if you control the turbine speed by controlling air flow, you will end up with badly corroded turbine wheel in the first run. See my 2008 project (in my CZcams channel) with downdraft gasifier along with cyclone gas cleaning and cyclone combustor. I used smaller turbo (TD05) and generated 1 kw electricity using second stage (holset) turbo
I feel like the gasifier ruins the simplicity. There has to be a way to filter or inertialy separate the char. Either cyclone separator or a coaxial tube with the compressor outlet outside the turbine return. Then maybe cooling air could be circulated back as well, cause imma guess heat was a problem. I just would try everything I could before trying to do a gasifier.
@@astronichols1900 Adding a series of vertical baffles (first coming from top, second coming from bottom, third from top, etc.) will eliminate large char. Then, can have one bypass tube at the compressor outlet directly connecting the compressor to the turbine (preferably passing through the main shell to heat air) while an air valve can be added to the main air supply at the combustor inlet to control turbine speed and temperature. Closing the valve partially will reduce air to the combustor forcing air through the bypass. Turbine inlet temperature should be always below 900 degree C.
I would use 2 combustion chambers, piped like a modern high-bypass jet engine. Only a small amount of the boost air goes into the fuel chamber to keep the fire hot. The rest of it goes to a second chamber, where the fuel-rich gases are gradually mixed with the remaining air over a baffle so that they are cleanly consumed before being diluted to a lean mixture that will avoid overheating the turbo. This second pipe could quite easily double as a cyclone separator to throw out any large debris back into the 1st chamber. Also, am I seeing this correctly that the oil overflow from the turbo was piped back into the combustion chamber? You've basically guaranteed a fuel-rich runaway doing that. The excess oil should go to a cooler and filter, then get reused.
the complete lack of fuel and boost control means that these things will just continue to spool as long as they have fuel. meaning i cant see them not exploding. if you had a way to shut off air remotely you would be able to throttle it to a sustainable level. otherwise the turbo is just going to keep spooling up until you exceed the tourque limits of the shaft. which is what it looks like happened here. the power being transmitted from the exhaust wheel to the compressor wheel snapped the shaft. if it has some kind of boost controler, you could have yourself a wood fired gas turbine.
turbos do not produce a lot of torque. that turbo makes at Max 50 to 100lb-ft of torque. no where near enough to break the shaft. they blew this turbo because they are hilljack morons who over speed it till it exploded the turbine wheel. they likely over temped it too.
@@cbrunnem6102 may be true in this case, but not always true. i work with turbos that are rated to 2500 shaft hp. admittedly they rocket engine turbo pumps. but thats more or less what this is, a self feeding, zero cut off infinitly cascading turbine. its going to keep building until it fails or runs out of fuel. and they can indeed build up so much boost they break their shaft. compressing air takes a lot of power.
@@jondepinet John would a large external Wastegate plumbed between the combustion chamber and exhaust housing be effective at controlling boost? Or be better off controlling the air feeding out of the compressor and into the combustion chamber? I'm very keen to build one. I'm a pressure welder and car nut and quite keen to build one but dont want to blow it up every time I fire it up.
What a cracking experiment, interesting concept. I would say the turbo failed and not your idea. Need to fit a boost gauge to see what pressure it was building before it let go. Yeah, I will definitely watch more of this. Thanks for some fresh footage.
Power steering pumps make great oil pumps, that's what I used powered by a furnace fan motor with a tank and T fitting bypass valve to regulate pressure.
4:38 Idk why but i love the fact that it changes the high pitched annoying whine for a Deeper, Angrier and Strong whine at full speed. That thing just Screams POWER an i love it.
Thank you , to my untrained eye, that thing becomes a jet engine, you just have the limited amount of fuel in the burn chamber. Absolutely amazing build, I loved seeing it! Did you say bigger and twin turbos to come?
Yes that is correct! We are actually doing another test run with a single large turbo today to make sure our door can handle it, then we move into twin turbo buil
I was watching without sound half way through...though this was a very fast and hot BBQ grill and I assumed "the rectangular door" was the flat grill top part...I was definitely wrong....when I replayed the video with sound I understood that it wasn't a grill at all....yet .. Great job everyone. Keep up the recycling of parts. Could you use old crankcase oil as a turbo lube then feed to an injector or atomizer nozzle within the burn chamber.? That way the heat from the bearings will be partially cooled thus thinning the oil with heat . Thin copper tubing could also be traced around the exterior of the bearing housing to collect more heat ...then finely sprayed into the "Super Combuster "
@@rearspeaker6364 I think that's part of the reason it failed. The pressure within the chamber would have been pushing back up the drain. Not allowing it to lube properly.
Reminds me of the Monty Python and the Holy Grail scene, "run away, run away!" "We need a bigger turbo", ahahaha, yeah that's the solution. With no boost control, that's what you call a positive feedback loop, with the sole limitation on infinite power being the fuel supply and rotational speed limits on the turbo. I don't blame them for getting away from it. And that was totally epic! :)
When that bugger became self-sustaining and the revs soared, that's exactly what I was thinking! 😆 "Run away! Run away!" czcams.com/video/YWTJ8iZr7ro/video.html&ab_channel=SunBunz
Great video! I think you should try a closed loop oiling system next time. Because this system simply has too much back pressure from the burn barrel preventing it from working well.
You do realise that you have a redhot(read: 750 deg C plus) mild steel( read: not reliable above 450deg C) combustion chamber that is sitting at 200 to 300 kPa with flammable gases!...wood gas that effectively consist of carbon monoxide and hydrogen ! Scrapnel from the failing turbo might be the least of of your worries ! ... but still very cool project, but don't injure yourselves or worse maybe consider incorporating some industrial burst panels to direct the "woof" when the dog want's to bark!
@@vlakkieaarde I couldn't of said it better. The way that thing is heating up its about a minute or so from becoming a really bad day for all around it. At the least they need some blast panials and maybe even some stronger steel and some hi heat bolts. That 4mm door is way to thin. The best case sanaro was the turbo blowing. It really needs some kind of pop off for the extreme pressure buildup also. I think your observations were spot on.
Egt too high but thats alright, it needs a wastegate. Run 40psi, cummins isx usually run around 38 psi so 40 should be fine, 60 would be pushing it and it was probably pushing 200 psi in this video hahah
I wonder what would happen with a water injection system upstream of the exhaust turbine? Spay in enough water too keep the EGT around 500-600C. Not only will that avoid slagging the turbo but it would actually give *more* volume to power things with. The downside is that it would require a long enough manifold to fully vaporize the water or risk eroding things.
@@benjaminshropshire2900 I reckon the water would either shut it down or blow it up immediately depending on if the exhaust is hot enough to vaporise all of it. If it is hot enough it'll be too much steam or not enough cooling. Plus they'd need a high pressure pump and some way to make sure the injection nozzle doesnt get blocked or melt on startup.
@@Patrick-zr8tv I suspect the pressure needed wouldn't be that high: the bucket doesn't look like it would hold more than a few hundred psi anyway. Mostly it will depend on the nozzle choice. Even then a pressure washer would be more than enough. As for how much water to pump in; I was thinking of some kind of closed loop control using a temperature sensor to regulate the EGT. And I don't think too much water shutting down the fire would be a risk as long as the injectors are after the fire box.
Im not even going to lie, I thought this was going to be the worlds hottest BBQ lol. I love the high vis jackets though, so the chunks of super sonic turbine blades can see you in the dark.
This is the same concept of a diesel engine running out of control. It will continue ramping up until some part or parts crucial to maintaining the pressure fails. Needs a wastegate at the very least to not basically be a bomb.
@@shaneintegra a wastegate is a pressure release for the hot side on a turbo and the main idea is to release pressure to stop the turbine from spinning faster thus controlling the pressure
You can try the top end air inlet to the combustion chamber, this will increase the depth of combustion of the fuel and reduce smoke and temperature at the top plate and at the outlet. Great job, fly safe!
Well.. that was something different! I've usually thought already about random things I see people doing but not this one. So much potential. Personally I'd go with a much thicker pressure vessel and one with a quick-lock door, much like in a submarine. Perhaps such things can be found in the food processing industry? Just nuts though. Keep videos coming!
Needs some kind of pipes internal to the burn chamber with a lot of holes drilled in that connect to the intake and exhaust. One to diffuse the intake air a bit better, and the other to help screen out any possible debris. Turbo might last a little longer with those things added and some kind of rudimentary throttling mechanism. Also try and figure out if it's possible to do something interesting with the bleed air on the compressor side, maybe spin another turbine connected to a small generator or something goofy like that.
Fantastic, just needs a waste gate! From the looks of it the waste oil goes in to the burner? Great idea, I wonder if it could be self sustaining just on the oil... I reckon over pressure along with a piece of 'fuel' being ingested is what blew the turbo.
Very self-sustaining. That's the basis of what happens when a diesel engine goes into runaway, an oil seal failure allows the intake spool to atomize the oil and the diesel engine happily consumes it as fast as it can go. A diesel in runaway will continue to accelerate until it blows apart, or all of the fuel is gone. The only way to stop this is to smother it, block the air inlet.
Fantastic build, very well done! Luckily the Turbo failed before the entire device turned into a bomb that even Osama would have been proud of. A daytime run would look amazing with all that smoke, even Greta would come running to see what all the fuss was about!
@@escapetheeveryday do you think you could put a pressure safety valve on there? Don't know where you could get one that could withstand the heat but I think that'd be youre best bet if the boost suddenly spikes before you can react.
@@nickmiroli It'd probably jam with all the debris. Either open or closed. Ideally open. Also you would need a computer of some kind and some kind of pressure feed, both of which would be a bit too complex to justify I think.
@@Patrick-zr8tv you can angle it so it wouldn't catch debris if anything. Also there are lots of wastegates that operate on spring tension and vacuum. No electronics needed.
This is a project I've wanted to embark on for a while actually. Do you have anything covering your combustion chamber design? Controlling gas velocity inside the combustion chamber would go a long way to helping prevent so much particulate matter going through the turbine. Fuel air mixture is probably not ideal either. The next progression, that I really want to try is a twin turbo system that runs off a gasifier. Both turbos fed by the same exhaust, but one compressor is drawing wood gas, the other fresh air and that is combined in the combustion chamber.
That's a pretty good idea actually. You'd almost certainly need the bigger turbo drawing the wood gas (due to the restriction of the gasifier and all the fuel you'd need to draw through), and then a smaller one to drive the combustion chamber.
@@raelik777 I've done a fair amount of the math and by the time you count all the restriction of the gasifier, you can make up for it with filtration/restriction on the clean air side. Woodgas needs to be somewhere around 1:1 afr, so two identically sized turbos should be perfect, then balance the turbo output with throttle plates on the inlet side. I have been eying up the turbos off the nissan twin turbo 300zx. Little tiny things that they are, would be perfect for a test rig. Just can't afford to build a gasifier and turbine setup.
what happened is a self-sustaining chain reaction. where the turbo will accelerate until it explodes (unless its rotation is controlled by the air intake, as solid fuels have no burning control). that's the problem with rocket engines. once the reaction starts, it will occur at its maximum potency. basically you created a reaction engine, a turbojet, with a brayton cycle.
Looks fun! Just a thought, looks like oil return is connected to the burn chamber.. wouldnt pressure in here on full chat be higher than the oil feed, thus pushing the oil back or restricting flow, starving the turbo?
@@So-Flo indeed, we had a honda cr-v in last week for a turbo replacement, snapped shaft. Turns out the oil hadnt been changed in 80k miles, alas none of the thick black gunge was getting to the turbo bearings!
It absolutely will 100 % I only know this cause an engine with excessive blow by will do the exact same thing or cause a huge pile leak in the turbo housing which also starves the shaft of oil
Here's a fun thought. Let's pretend the only fire buckets I know about are the kind used for putting fires out and not starting them, and then explain what this thing is and why it needs to be turbo charged.
That was very cool ! Appears to have gone into runaway mode on you or it sucked something from burn chamber into it. For sure needs some way to bleed off pressure lol
Well there’s no active control, and it’s a positive feedback loop, so it’s either damped so much that it can’t self sustain (below critical rpm) or it is running away unless som other damping comes into effect to limit rpm increase
Possible modifications for future iterations: Wastegated turbo (ball bearing?) - might act to self-regulate system pressure and therefore shaft speed Dump valve on the compressor pipe - let you use chamber pressure rather than compressed air directly to the compressor to spool up, while free-wheeling the turbo, then once it has some speed, route discharge air into the combustion chamber and shut off starting air. Double-wall and/or stiffening ribs on the access door. Or use a plug-type door of the kind used for service doors on liquid tanks, mounted on the side so it isn't directly exposed to the heat of the fire as when mounted above. Just spitballin...
As far as I know with turbos, the blades are threaded on in a way that they get tighter when they spin. So if it were to spontaneously seize the turbo shaft at high rpm both blades on the turbo shaft can excitedly leap off the turbo shaft.
This definitely needs a way to control boost pressure, seems like since all the exhaust has to go through the turbo it can go in a cycle of more air in causes more combustion causes more exhaust causes more air in and keep speeding up until it explodes. Normally the fuel supply is controlled to control the power level but here the air supply could be controlled instead with a restrictor on the inlet or a wastegate/bypass on the exhaust so it doesn't all go through the turbo
Could you guys give a technical explanation on how that system works? I can’t seem to wrap my head around how the turbo is able to keep spoiling without outside air.
They blow fresh compressed air in,fanning the fuel, until hot exhaust gas pressure is enough to turn turbo, becoming self sustaining. The outside air is coming in where he is blowing the compressed air. (Front of turbo)
I think, the pressure the turbo does is higher compared to the pressure of the exhaust gas from the drum (but not the amount). Thats makes the turbo put air into the chamber while exhaust gas is driving the turbo at the same time. Therefore it seems like a perpetuum mobile but its not, because it consumes fuel.
I think the lubricating oil needed a loop with a cooler built in. An interesting way to get rid of garden waste quickly... Next you need to work out how to fuel it while it's running. Bleed off air to run a shredder, maybe?
That was one of the most awesome things I have ever seen. Oh the ideas that are spawning.... my neighbors are really going to hate me now. Thank you. EPIC!
Methanol injection would keep it cool nitrous will yeet it to the fuckin moon or possibly methamphetamine injection that way it gets amped up runs around and steels people shit I know I would watch
@Bushman......you've heard of a "Runaway Diesel" in trucks or locomotives. This is a "Runaway BBQ Grill"....and everything you cook on it....is well done. :)
@@jlew5545 Well Mr. Lew.... Once again... Unusual. But then again , Rolls Royce fires frozen chooks into the intake manifolds of jet turbines running flat out to see what happens so I suppose your rather detonative practice of disintegrating truck turbo chargers in your rather imaginative manner is not quite as unusual as I first thought. But, if I might add a word or two of advice, it may serve to add a perforated cooling chamber directly attached to the underside of the BBQ plate through which you might pump compressed air into the fire drum in a similar manner to that used in jet engine afterburners. Might stop the BBQ plate from becoming so deformed. And as an additional thought, although I am not a workplace and stupidity nazi (because I firmly believe in the order of natural selection), you might consider constraining the detonative force of your exploding turbo chargers with a reasonably heavy mesh cage to avoid possible damage or destruction to expensive cameras. Best of luck with it.
You made a, I assume, trash fired jet engine... A waste gate could be added to control pressure and maybe a blow-off valve on the inlet could be used to throttle. Maybe even a ball valve to regulate pressure / air into the burn chamber. I wonder what the turbine inlet temps were. Too hot there can cause a failure. I would put a probe just below the turbo inlet in the up pipe. Regulating air in could help there. Also, keep on it when air starting it. With real jet engines they start with an air or electric start, then you add fuel while still cranking to get the speed up to where it can run on it's own. If you have a dead battery or low air pressure and that drags on it can cause a hot start condition and can damage the turbine. For the door, maybe add something like 38x38x4mm angle welded to reinforce the door. Love the build!
Great eye protection. After all, what could go wrong? You only have something making boot pressure, and spinning at 100,000 rpm. MYE EYES ARE IMPERVIOUS TO FLYING METAL PIECES! You keep telling yourself that. I’m glad to see you had your safety squints on, and I’m sure your arm was plenty long to get you out of the danger zone. That extra 1/2” of arm stretch at the end really gets u into the safety zone.
What an amazing project , Not sure what it's good for but off the scale in ultimate coolness. Will be subscribing and watching the follow ups . A thought for a similar project 🤔 neodymium magnets mounted into intake fan and some coils on back of housing for power generation.
When the first line is the best bro .. basically it started with " I was drinking one night with the buddies around campfire night. And this was created "
What in cousin f'ing tarnation?? 🤣 that was beautiful, well done! Please don't blow yourself up building V2 though... and you may consider some ties going to the center of the flat door.
Ok, I'm halfway through and I'm thinking "Dude, clamp that line down and step tf back". Standing next to it is nerve-wracking. So grateful that he did just that.
HEY EVERYONE THE TWIN TURBO IS IN THE WORKS 🔥🔥🔥 stay tuned 😝
this is crazy lol
Working in the gas turbine industry. You may want to put a small shield around the rotating hardware. Because, I really want to see more of these and that would be hard without the guys that did it.
Awesome video guys.
yeah when i saw pieces flying my muscles clenched.
I was thinking the same, things under pressure go boom
Never forget the words of our elders “too many fast spin go boom”
I was thinking to myself I don't know how they didn't do the iconic "have I been shot" torso pat down. Because that was a lot of kinetic energy those pieces of metal flying apart had.
I grimaced when I saw how close the guy filming was
Typical Aussies, who else would build a turbo charged Barbie! Well done lads.
need a locomotive turbo on it.
@@rearspeaker6364 nah it clearly needs a turbo from a RT-flex96C
@@einar8019 that........just might be perfect!!!
Yea us Aussie make some weird shit
Idk who started it but us Americans have been doing this for a while. I don't care who makes them I just enjoy seeing them.
This is what CZcams used to be was stuff like this. Very refreshing.
This is why Americans love you guys
"Can I put the food in yet", "no the ovens still spooling up".
😂
Turbine may have ingested a piece of solid fuel. You might be able to prevent it from happening next time but what fun would that be?
Why wouldn't you fix that issue if it's gonna go boom boom every time if you don't?
More likely no lubrication. Oh they had an oil feed.. that oil is got to be pretty toasty. Did they have a full loop with a return and everything?
ID rather see the whole thing glowing red and then fail instead of a premature failure
@@Len_M. the oil return just went into the chamber which would have had enough preasure to just stop the oil from feeding
Bigger turbo with sharper, harder teeth?
You need to have two-stage combustion (i.e. gasifier-combustor) to avoid throwing hot char into the turbo that will damage it in minutes. Even if you control the turbine speed by controlling air flow, you will end up with badly corroded turbine wheel in the first run. See my 2008 project (in my CZcams channel) with downdraft gasifier along with cyclone gas cleaning and cyclone combustor. I used smaller turbo (TD05) and generated 1 kw electricity using second stage (holset) turbo
I feel like the gasifier ruins the simplicity. There has to be a way to filter or inertialy separate the char. Either cyclone separator or a coaxial tube with the compressor outlet outside the turbine return. Then maybe cooling air could be circulated back as well, cause imma guess heat was a problem. I just would try everything I could before trying to do a gasifier.
I mean to be fair gasifier is the right way to do it. I just can't possibly imagine getting that to work without tears. many tears.
@@astronichols1900 Adding a series of vertical baffles (first coming from top, second coming from bottom, third from top, etc.) will eliminate large char. Then, can have one bypass tube at the compressor outlet directly connecting the compressor to the turbine (preferably passing through the main shell to heat air) while an air valve can be added to the main air supply at the combustor inlet to control turbine speed and temperature. Closing the valve partially will reduce air to the combustor forcing air through the bypass. Turbine inlet temperature should be always below 900 degree C.
I would use 2 combustion chambers, piped like a modern high-bypass jet engine.
Only a small amount of the boost air goes into the fuel chamber to keep the fire hot. The rest of it goes to a second chamber, where the fuel-rich gases are gradually mixed with the remaining air over a baffle so that they are cleanly consumed before being diluted to a lean mixture that will avoid overheating the turbo.
This second pipe could quite easily double as a cyclone separator to throw out any large debris back into the 1st chamber.
Also, am I seeing this correctly that the oil overflow from the turbo was piped back into the combustion chamber? You've basically guaranteed a fuel-rich runaway doing that. The excess oil should go to a cooler and filter, then get reused.
Jesus loves you alot trust in His death 4 salvation and be saved from eternal hell
Can you do this to my George Foreman grill?
the complete lack of fuel and boost control means that these things will just continue to spool as long as they have fuel. meaning i cant see them not exploding. if you had a way to shut off air remotely you would be able to throttle it to a sustainable level. otherwise the turbo is just going to keep spooling up until you exceed the tourque limits of the shaft. which is what it looks like happened here. the power being transmitted from the exhaust wheel to the compressor wheel snapped the shaft.
if it has some kind of boost controler, you could have yourself a wood fired gas turbine.
Congrats.. you got the point of the video.. or maybe you didn't lol...
turbos do not produce a lot of torque. that turbo makes at Max 50 to 100lb-ft of torque. no where near enough to break the shaft.
they blew this turbo because they are hilljack morons who over speed it till it exploded the turbine wheel. they likely over temped it too.
nothing in this video exploded... they destroyed the hot side of the turbo with too much heat as well as large particles eroding it....
@@cbrunnem6102 may be true in this case, but not always true. i work with turbos that are rated to 2500 shaft hp. admittedly they rocket engine turbo pumps. but thats more or less what this is, a self feeding, zero cut off infinitly cascading turbine. its going to keep building until it fails or runs out of fuel. and they can indeed build up so much boost they break their shaft. compressing air takes a lot of power.
@@jondepinet John would a large external Wastegate plumbed between the combustion chamber and exhaust housing be effective at controlling boost? Or be better off controlling the air feeding out of the compressor and into the combustion chamber? I'm very keen to build one. I'm a pressure welder and car nut and quite keen to build one but dont want to blow it up every time I fire it up.
What a cracking experiment, interesting concept. I would say the turbo failed and not your idea. Need to fit a boost gauge to see what pressure it was building before it let go. Yeah, I will definitely watch more of this. Thanks for some fresh footage.
We just had a 2nd one going tonight! The vid will be out in a few weeks but let me tell you it makes this look like a fairy haha!
I have a boost gauge he can have! It has a high psi rating
@@escapetheeveryday did you put a waste gate on it?
@@stevesyncox9893 don't want to waste boost , haha
@@escapetheeveryday just subscribed
Power steering pumps make great oil pumps, that's what I used powered by a furnace fan motor with a tank and T fitting bypass valve to regulate pressure.
4:38
Idk why but i love the fact that it changes the high pitched annoying whine for a Deeper, Angrier and Strong whine at full speed.
That thing just Screams POWER an i love it.
Thank you , to my untrained eye, that thing becomes a jet engine, you just have the limited amount of fuel in the burn chamber. Absolutely amazing build, I loved seeing it! Did you say bigger and twin turbos to come?
Yes that is correct! We are actually doing another test run with a single large turbo today to make sure our door can handle it, then we move into twin turbo buil
No... this is a turbine assisted blast furnace
@@escapetheeveryday
Thought of putting the oil return line into the turbo inlet?
The exhaust impeller sure hates eating burning wood.
Could it run on just the oil from the turbo? How much higher is the pressure inside the chamber compared to the exhaust manifold of a vehicle?
@@ICRob
Yes, but there would be a lot of unbury oil spewing out the exhaust turbine.
The pressures are the same as in a car
I was watching without sound half way through...though this was a very fast and hot BBQ grill and I assumed "the rectangular door" was the flat grill top part...I was definitely wrong....when I replayed the video with sound I understood that it wasn't a grill at all....yet
..
Great job everyone. Keep up the recycling of parts.
Could you use old crankcase oil as a turbo lube then feed to an injector or atomizer nozzle within the burn chamber.? That way the heat from the bearings will be partially cooled thus thinning the oil with heat . Thin copper tubing could also be traced around the exterior of the bearing housing to collect more heat ...then finely sprayed into the "Super Combuster "
I mean you could probably grill on that plate lol
the oil drain on this is going into the firebox.
Ultimately this is supposed to be a BBQ.
What is it then?
@@rearspeaker6364 I think that's part of the reason it failed. The pressure within the chamber would have been pushing back up the drain. Not allowing it to lube properly.
Reminds me of the Monty Python and the Holy Grail scene, "run away, run away!" "We need a bigger turbo", ahahaha, yeah that's the solution.
With no boost control, that's what you call a positive feedback loop, with the sole limitation on infinite power being the fuel supply and rotational speed limits on the turbo. I don't blame them for getting away from it. And that was totally epic! :)
When that bugger became self-sustaining and the revs soared, that's exactly what I was thinking! 😆 "Run away! Run away!" czcams.com/video/YWTJ8iZr7ro/video.html&ab_channel=SunBunz
tim the enchanter: hahaha i told you so! xD
You know it's dangerous when you see aussies backing away .
Great video! I think you should try a closed loop oiling system next time. Because this system simply has too much back pressure from the burn barrel preventing it from working well.
i think that why it faild
I come to the comments to say the same thing. The turbo needs lubricant especially at that speed!
You do realise that you have a redhot(read: 750 deg C plus) mild steel( read: not reliable above 450deg C) combustion chamber that is sitting at 200 to 300 kPa with flammable gases!...wood gas that effectively consist of carbon monoxide and hydrogen !
Scrapnel from the failing turbo might be the least of of your worries !
... but still very cool project, but don't injure yourselves or worse
maybe consider incorporating some industrial burst panels to direct the "woof" when the dog want's to bark!
@@vlakkieaarde I couldn't of said it better. The way that thing is heating up its about a minute or so from becoming a really bad day for all around it. At the least they need some blast panials and maybe even some stronger steel and some hi heat bolts. That 4mm door is way to thin. The best case sanaro was the turbo blowing. It really needs some kind of pop off for the extreme pressure buildup also. I think your observations were spot on.
Yeah, the turbine shaft sheared. That is lubrification problem right there.
They should put a 12V auxiliary oil gear pump
Egt too high but thats alright, it needs a wastegate.
Run 40psi, cummins isx usually run around 38 psi so 40 should be fine, 60 would be pushing it and it was probably pushing 200 psi in this video hahah
I wonder what would happen with a water injection system upstream of the exhaust turbine? Spay in enough water too keep the EGT around 500-600C. Not only will that avoid slagging the turbo but it would actually give *more* volume to power things with.
The downside is that it would require a long enough manifold to fully vaporize the water or risk eroding things.
@@benjaminshropshire2900 I reckon the water would either shut it down or blow it up immediately depending on if the exhaust is hot enough to vaporise all of it. If it is hot enough it'll be too much steam or not enough cooling. Plus they'd need a high pressure pump and some way to make sure the injection nozzle doesnt get blocked or melt on startup.
@@Patrick-zr8tv I suspect the pressure needed wouldn't be that high: the bucket doesn't look like it would hold more than a few hundred psi anyway. Mostly it will depend on the nozzle choice. Even then a pressure washer would be more than enough.
As for how much water to pump in; I was thinking of some kind of closed loop control using a temperature sensor to regulate the EGT. And I don't think too much water shutting down the fire would be a risk as long as the injectors are after the fire box.
Semi turbos can easily 80+ psi, waste gates main purpose is to prevent the engine from receiving 80+ psi because pistons don't like it much.
Im not even going to lie, I thought this was going to be the worlds hottest BBQ lol. I love the high vis jackets though, so the chunks of super sonic turbine blades can see you in the dark.
Crazy, I’ve never seen a bbq with turbo lag
You seem to have created an extremely efficient pollution creator... congratulations???
ITS A BURN BARREL ITS ONLY PURPOSE IS TO BURN TRASH
That's just flat out ridiculous, sketchy, I like it.
Keep this craziness going! Love it and want to see it sustainably running
This is the same concept of a diesel engine running out of control. It will continue ramping up until some part or parts crucial to maintaining the pressure fails. Needs a wastegate at the very least to not basically be a bomb.
This is nuts ! I am sold in and subscribed. Waiting for the twin turbo !
I have always wanted to build one of these! You don't need a bigger turbo, you need some type of boost pressure control like a wastegate
That is what wastegates are supposed to do, regulate the boost pressure. I feel it would be the solution.
Just control the fuel. Use a flow restriction.
i want to know how much pressure it made
What are they for exactly?
@@shaneintegra a wastegate is a pressure release for the hot side on a turbo and the main idea is to release pressure to stop the turbine from spinning faster thus controlling the pressure
try putting a safety valve on it to release some pressure if it gets too high
whats the fun in that?
@@Patrick-zr8tv Not turning it into a homemade bomb and dying
I think the screw-on lid works as a safety valve.
@@dave161141 it's closer to to a claymore than a safety valve.
You can try the top end air inlet to the combustion chamber, this will increase the depth of combustion of the fuel and reduce smoke and temperature at the top plate and at the outlet.
Great job, fly safe!
I just found this and it looks amazing. My neighbors would love this.
I always thought about this! Glad to see someone did it.
Well.. that was something different!
I've usually thought already about random things I see people doing but not this one. So much potential. Personally I'd go with a much thicker pressure vessel and one with a quick-lock door, much like in a submarine. Perhaps such things can be found in the food processing industry?
Just nuts though. Keep videos coming!
vessel could rupture when its glowing, thicker walls are better.
Maybe we figured out why engines have waste gates on the turbos🤣
The fact that you did that to 4mil steel is equally frightening and impressive.
Needs some kind of pipes internal to the burn chamber with a lot of holes drilled in that connect to the intake and exhaust. One to diffuse the intake air a bit better, and the other to help screen out any possible debris. Turbo might last a little longer with those things added and some kind of rudimentary throttling mechanism. Also try and figure out if it's possible to do something interesting with the bleed air on the compressor side, maybe spin another turbine connected to a small generator or something goofy like that.
Need to tap the high pressure side and make a reburner for the fuel rich exhaust. Bet you could get a wicked flame instead of a column of smoke
This is a good reason to NEVER invite the OSH Rep to a Barbecue.
I think I'm proud to be Australian 😎
Leo I love how I keep finding you in comments on videos I watch haha, guess you like the same stuff I do then.
I wanted to build this. Thank you for saving me a lot of time and money.
Fantastic, just needs a waste gate!
From the looks of it the waste oil goes in to the burner? Great idea, I wonder if it could be self sustaining just on the oil...
I reckon over pressure along with a piece of 'fuel' being ingested is what blew the turbo.
Very self-sustaining. That's the basis of what happens when a diesel engine goes into runaway, an oil seal failure allows the intake spool to atomize the oil and the diesel engine happily consumes it as fast as it can go. A diesel in runaway will continue to accelerate until it blows apart, or all of the fuel is gone. The only way to stop this is to smother it, block the air inlet.
Drunk CZcams for the win again. I concur with the need for a bigger turbo. Possibly a debris screen upstream too 🤣🤣 Can’t wait for the next one
The turbo spolling up to create a black hole 😂😂
Fantastic build, very well done! Luckily the Turbo failed before the entire device turned into a bomb that even Osama would have been proud of. A daytime run would look amazing with all that smoke, even Greta would come running to see what all the fuss was about!
We do have regrets on that, tbh we didn't think it would even go! We have Installed a safety switch!
@@escapetheeveryday What about a wastegate to regulate boost
@@escapetheeveryday do you think you could put a pressure safety valve on there? Don't know where you could get one that could withstand the heat but I think that'd be youre best bet if the boost suddenly spikes before you can react.
@@nickmiroli It'd probably jam with all the debris. Either open or closed. Ideally open. Also you would need a computer of some kind and some kind of pressure feed, both of which would be a bit too complex to justify I think.
@@Patrick-zr8tv you can angle it so it wouldn't catch debris if anything. Also there are lots of wastegates that operate on spring tension and vacuum. No electronics needed.
This is a project I've wanted to embark on for a while actually. Do you have anything covering your combustion chamber design? Controlling gas velocity inside the combustion chamber would go a long way to helping prevent so much particulate matter going through the turbine. Fuel air mixture is probably not ideal either. The next progression, that I really want to try is a twin turbo system that runs off a gasifier. Both turbos fed by the same exhaust, but one compressor is drawing wood gas, the other fresh air and that is combined in the combustion chamber.
That's a pretty good idea actually. You'd almost certainly need the bigger turbo drawing the wood gas (due to the restriction of the gasifier and all the fuel you'd need to draw through), and then a smaller one to drive the combustion chamber.
@@raelik777 I've done a fair amount of the math and by the time you count all the restriction of the gasifier, you can make up for it with filtration/restriction on the clean air side. Woodgas needs to be somewhere around 1:1 afr, so two identically sized turbos should be perfect, then balance the turbo output with throttle plates on the inlet side. I have been eying up the turbos off the nissan twin turbo 300zx. Little tiny things that they are, would be perfect for a test rig. Just can't afford to build a gasifier and turbine setup.
I'm not a save the planet kind of person but that was a lot of pollution still pretty cool with the explosion near the end
You just randomly showed up on my feed, and this video has got me hooked, this was crazy
Good to see safety first fella’s. 😂❤️🇦🇺
We did use gloves 🙈🤷♀️
@@escapetheeveryday exactly
My kind of content! Subbed.
Dude this thing turned into a damn turbojet.
Can you imagine a steam locomotive with a huge turbo in it? Holy waaa! Now thats some powah!!!
Excellent 👍🏽 I would include a waist gate in this design to lower the explosion risk. GREAT JOB 👏
that may be the ultimate idea, for the whole thing to blow, not a turbo.
Came here to say the same thing
he said he doesn’t want to lose boost 😂😂😂 guys a madman hope they can make it work without one
@@saab-xq8lc I know 🤣 INSANE but very cool!!!
Have you considered adding a throttle before the intake?
This is the exact right level between enginuety and stupidity I was looking for :D
what happened is a self-sustaining chain reaction. where the turbo will accelerate until it explodes (unless its rotation is controlled by the air intake, as solid fuels have no burning control). that's the problem with rocket engines. once the reaction starts, it will occur at its maximum potency. basically you created a reaction engine, a turbojet, with a brayton cycle.
Why does the world need this?
I mean, what is the purpose of a "fire bucket"?
Looks fun! Just a thought, looks like oil return is connected to the burn chamber.. wouldnt pressure in here on full chat be higher than the oil feed, thus pushing the oil back or restricting flow, starving the turbo?
Nah, it didn't sound like they were much past 10psi of boost. Any good oil supply will be 40+psi
@@alexst-laurent5272 looks like they are just using a oil filler pump for oil feed. Wouldn't make much pressure.
I recon you're right. Failure mode supports that also, broken shaft.
Perhaps do as Bobby Mcboost does and recirculate the oil into a bucket
@@So-Flo indeed, we had a honda cr-v in last week for a turbo replacement, snapped shaft. Turns out the oil hadnt been changed in 80k miles, alas none of the thick black gunge was getting to the turbo bearings!
It absolutely will 100 % I only know this cause an engine with excessive blow by will do the exact same thing or cause a huge pile leak in the turbo housing which also starves the shaft of oil
its really impressive how much energy wood has
"I reckon we just gt a bigger turbo and we will be alright" ... crying 🤣
Would love to see a pressure gauge on there and see what it reaches
Excess temp at the turbine and explosive failure?
In any case, it was absolutely mesmerizing. Next time record it with a thermal camera, please.
i think they just didnt get any oil to the turbo
I'm glad to see this get big, this is one of the most creative things I've seen all day
czcams.com/video/83jH0sVCM9Q/video.html
Here's a fun thought. Let's pretend the only fire buckets I know about are the kind used for putting fires out and not starting them, and then explain what this thing is and why it needs to be turbo charged.
That was very cool ! Appears to have gone into runaway mode on you or it sucked something from burn chamber into it. For sure needs some way to bleed off pressure lol
Well there’s no active control, and it’s a positive feedback loop, so it’s either damped so much that it can’t self sustain (below critical rpm) or it is running away unless som other damping comes into effect to limit rpm increase
Possible modifications for future iterations:
Wastegated turbo (ball bearing?) - might act to self-regulate system pressure and therefore shaft speed
Dump valve on the compressor pipe - let you use chamber pressure rather than compressed air directly to the compressor to spool up, while free-wheeling the turbo, then once it has some speed, route discharge air into the combustion chamber and shut off starting air.
Double-wall and/or stiffening ribs on the access door. Or use a plug-type door of the kind used for service doors on liquid tanks, mounted on the side so it isn't directly exposed to the heat of the fire as when mounted above.
Just spitballin...
As far as I know with turbos, the blades are threaded on in a way that they get tighter when they spin. So if it were to spontaneously seize the turbo shaft at high rpm both blades on the turbo shaft can excitedly leap off the turbo shaft.
This definitely needs a way to control boost pressure, seems like since all the exhaust has to go through the turbo it can go in a cycle of more air in causes more combustion causes more exhaust causes more air in and keep speeding up until it explodes. Normally the fuel supply is controlled to control the power level but here the air supply could be controlled instead with a restrictor on the inlet or a wastegate/bypass on the exhaust so it doesn't all go through the turbo
Dude I'd like to know how much pressure built up in the burn chamber right before the turbo went kaput
Could you guys give a technical explanation on how that system works? I can’t seem to wrap my head around how the turbo is able to keep spoiling without outside air.
They blow fresh compressed air in,fanning the fuel, until hot exhaust gas pressure is enough to turn turbo, becoming self sustaining. The outside air is coming in where he is blowing the compressed air. (Front of turbo)
I think, the pressure the turbo does is higher compared to the pressure of the exhaust gas from the drum (but not the amount). Thats makes the turbo put air into the chamber while exhaust gas is driving the turbo at the same time. Therefore it seems like a perpetuum mobile but its not, because it consumes fuel.
Jet engine, basically with wood stove instead of combustion chamber...
Ok that makes more sense now that I think about it
I've no idea what I just watched, but I thoroughly enjoyed it.
you guys are all bloody nuts and that was bloody AWESOME !!! do it again , go on do it again , PLEASE .
I think the lubricating oil needed a loop with a cooler built in.
An interesting way to get rid of garden waste quickly... Next you need to work out how to fuel it while it's running. Bleed off air to run a shredder, maybe?
interesting idea.
And someone driving a Prius thinks they're making a difference.
Its a burn barrel, it creates about as much smoke as a camp fire it just creates all the smoke in a short time.
@@SirFloofy001 I'm not a Prius driver. Burn all my trash Zero fucks given.
4mm (5/32") thick steel completely bulged by the impressive pressure generated by that turbo
Well, pressure plus the fact that is was red hot and very malleable.
That was one of the most awesome things I have ever seen. Oh the ideas that are spawning.... my neighbors are really going to hate me now.
Thank you. EPIC!
czcams.com/video/83jH0sVCM9Q/video.html
Egt too high. Should have mounted a pyrometer.
do the next one with friggen nitrous into the turbo maybe keep it cool longer, or something, idk itll be fucking cool though
nitrous to keep it cool yeah great idea ;)
if you add more oxygen the heat of combustion increases. what you need is liquid injection
Methanol injection would keep it cool nitrous will yeet it to the fuckin moon or possibly methamphetamine injection that way it gets amped up runs around and steels people shit I know I would watch
@@davidrice4873 don't tell him that!!!!!!
@@rearspeaker6364 lmao maybe i overstepped. And dont believe everhthing people say on the internet
This is the kind of thing only an Aussie could conceive of.
That explosion sounded so sick. I wish my turbo let off with that sound 🤣
Turbo fire bucket?? What is it and what is it supposed to do?
it is to spool turbos to death for our entertainment hahaha
@@jordanbishop8471 Riiiight. Fair enough. Seems like an expensive way to have fun though.
@Bushman......you've heard of a "Runaway Diesel" in trucks or locomotives. This is a "Runaway BBQ Grill"....and everything you cook on it....is well done. :)
@@jlew5545 Well Mr. Lew.... Once again... Unusual. But then again , Rolls Royce fires frozen chooks into the intake manifolds of jet turbines running flat out to see what happens so I suppose your rather detonative practice of disintegrating truck turbo chargers in your rather imaginative manner is not quite as unusual as I first thought. But, if I might add a word or two of advice, it may serve to add a perforated cooling chamber directly attached to the underside of the BBQ plate through which you might pump compressed air into the fire drum in a similar manner to that used in jet engine afterburners. Might stop the BBQ plate from becoming so deformed. And as an additional thought, although I am not a workplace and stupidity nazi (because I firmly believe in the order of natural selection), you might consider constraining the detonative force of your exploding turbo chargers with a reasonably heavy mesh cage to avoid possible damage or destruction to expensive cameras. Best of luck with it.
Who am I to judge. But that's pretty Dumb in my opinion. But if you having fun, carry on.
You made a, I assume, trash fired jet engine...
A waste gate could be added to control pressure and maybe a blow-off valve on the inlet could be used to throttle. Maybe even a ball valve to regulate pressure / air into the burn chamber.
I wonder what the turbine inlet temps were. Too hot there can cause a failure. I would put a probe just below the turbo inlet in the up pipe. Regulating air in could help there. Also, keep on it when air starting it. With real jet engines they start with an air or electric start, then you add fuel while still cranking to get the speed up to where it can run on it's own. If you have a dead battery or low air pressure and that drags on it can cause a hot start condition and can damage the turbine.
For the door, maybe add something like 38x38x4mm angle welded to reinforce the door.
Love the build!
with all this heat, I want a 10mm thick door.
"I reckon we just get a bigger turbo and we should be right" - loved that quote
Great eye protection. After all, what could go wrong? You only have something making boot pressure, and spinning at 100,000 rpm. MYE EYES ARE IMPERVIOUS TO FLYING METAL PIECES! You keep telling yourself that. I’m glad to see you had your safety squints on, and I’m sure your arm was plenty long to get you out of the danger zone. That extra 1/2” of arm stretch at the end really gets u into the safety zone.
What an amazing project ,
Not sure what it's good for but off the scale in ultimate coolness.
Will be subscribing and watching the follow ups .
A thought for a similar project 🤔 neodymium magnets mounted into intake fan and some coils on back of housing for power generation.
czcams.com/video/83jH0sVCM9Q/video.html
That was insane, great work boys
sweet vid when i seen the black smoke and could hear the turbo take off i knew that its gonna blow or run out of gas
Maybe you guys could fabricate a mesh screen to catch any large objects from impacting the turbine? Anyways, awesome video. That was great.
This is absolutely incredible.
Gotta love the mage in his safety shorts! Lol
Beautiful biomass turbine
Literally a wood powered jet engine.
The bucket looks like angry bull when u stand back nice stuff u guys
As soon as I head the accent and saw the shorts I knew this was gonna be great
When the first line is the best bro .. basically it started with " I was drinking one night with the buddies around campfire night. And this was created "
That was absolutely epic!! Colin furze would be proud 🤣😂🤣
There might be easier ways to grill steaks, but hey, I’m down for whatever.
That must be the weirdest looking barbecue grill
What in cousin f'ing tarnation?? 🤣 that was beautiful, well done!
Please don't blow yourself up building V2 though... and you may consider some ties going to the center of the flat door.
Now the mad scientist and myself have to rip apart the block, and replace the piston rings you fried. 🤣
Ok, I'm halfway through and I'm thinking "Dude, clamp that line down and step tf back". Standing next to it is nerve-wracking. So grateful that he did just that.
Now that looks like a turbocharged BBQ smoker. Ok let's lite the grill. I ❤️ it!👍💙💛