Full Throttle Test: Did we Push a Pulse Jet Engine to its Limits?!
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- čas přidán 7. 06. 2024
- We bought and built a pulse jet engine. We test it without an augmenter in this video, stay tuned for our next video where we try to increase its thrust. If you try to do this at home, please do it safely.
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something aspiring scientists should note here. "I was wrong" is a valid outcome and not something to be ashamed of.
I know that I can be wrong about nearly anything but only because it's happened so often in the past.. 🤪
Hell, me being wrong in some way is about the only thing I can really count on being true most of the time.
The most powerful thing in science isn't "Eureka!", it's "Huh... that's odd. I wonder why it does that?"
let's take it one step further-
when you have a theory in your hand
practice reversing it several times
and only then allow your mind
to look for ways to investigate-
you see in this way
there is only investigation
-the only wrong is knowing the outcome
-before you do the experiment
ps everyone; be a scientist
You should do everything you can to disprove your hypothesis. If it's not falsifiable it's not science.
"I didn't believe them..." The line that starts all great science stories. ❤
And not really starting small...
I been thinking, couldn't a Tesla valve possibly be used on one of these engines? Keeping the flow in one direction possibly inject fuel in the valve?
No.
The problem with his valve is that even though it favors one direction of flow, the difference is relatively small. To achieve a significant difference, it requires a lot of stages, and this interferes with flow in the desired direction.
@@TechIngredientsCould one CAD that and run a fluid flow analysis?
bruce simpson from new zealand has been working on these and posting them on the internet since around 1999, google it if you want some nearly lost internet science
Waiting for rotating detonation engine
There is a universe close by where Tech Ingredients and Integza are neighbours 😂
And Styropyro lives across the street!
Or a turbo strapped to the exhaust nozzle!
I agree 👍 that would be awesome 😊
Oh
"Loud, and so far, no police" sounds like me on a night out. Great video guys
So far no Interpol.
no great story ever started with a glass of milk
An ER nurse shared that her patients too often are still reveling in a good time.
Kudos for good judgement!!
@@SupremeRuleroftheWorldEver play Legend of Zelda?
@@gaelonhays1712 i have no. i refuse to buy nintendo because of their shitty treatment of customers.
When I was 16, in the 1950s, I tried to make a pulse-jet from a 3 inch steel naval gun shell casing that my dad brought home. I went through several drill bits opening up the base as that casing had been hardened from its one time use. Not having worked out the flutter valve yet, I wanted to test the fuel injection, which for me was a Colman stove generator unit. It scared me when it shot a flame 16 feet long across the garage floor and I instantly closed the valve. Apparently I had built a flame thrower instead.
Tipping the shell casing up outside the garage I looked down the barrel and seeing some remaining liquid at the bottom decided to get rid of the evidence. I dropped a match down it and the resulting puff of flame singed my eyebrows off. I was lucky that that was the worst of that experiment in jet power.
Eyebrows are a small sacrifice for a good story .
hey, i also have tried to drill through spent large calibre casings..hardened through its one time use??i never considered that,makes sense! thanks
Nice to see someone here older than me. Was 7 as I cleared to 50s. Reminds me of looking down the throats of dual quads when the engine backfired. My brother said, "You should see your hair man!🤣"
You’re lucky. I still have scars on my arm. 4th degree burns.
I call that a partial success!
By the way, one of the engineers helping build the pulse-jet for the V1-german-rocket in WW2, lived after the war in Eastern Germany, and invented the 2stroke-engine-resonance-chamber, based on the function-principle of the pulse-jet... Was later taken by the Japanese (Suzuki), to help them with his know-how win 2stroke-bike-races for Suzuki... The resonance-chamber is what first turned the 2stroke into a performance-beast as it replaces the charger (which 2strokes anyway didn´t have, or any other engines, for that matter), and it´s a piece of tuburarly-shaped-metal-sheet, very cost-efficient, when compared to expensive turbo-chargers...
I played around with expansion chambers for two strokes in my youth. I didn't find them efficient for road use. I think there is a very narrow bandwith in RPM and temperature at which they work and it's hard to keep to this in everyday road riding conditions. They are popular on small 2 stroke aero engines which usually operate in constant speed conditions.
@@nrml76 The whole theory around them isn´t trivial at all. If the baffle and the diffusor (the 2 cones of the chamber) have flatter (so, the 2 cones are longer), the bandwidth loses height, but gains extend. If you make them flatter, you have to make the belly(straight piece between the cones) smaller, cause the altogether-volume of the chamber has to be constant (depending on the cylinder´s cc). there´s a lot to that, sadly, and during youth one has time, but not experience or knowledge. if the cones have sharp angles, the bandwidth is high, but short too. if the cones are sharp, but the exhaust-pot´s upper edge is rounded, it counters the effect of the sharp cones, and nullifies the chamber´s effect somewhat, giving you a short AND low bandwidth. if you make the port´s upper edge straight, and the cones shap, you get the shortest bandwidth, but the highest one, aka highest performance. If you make such a sharp chamber´s pipe gliding on the exhaust pipe (2-piece-pipe, gliging in each other by a strong servo, automatically matching load and rpm), u get a the sharpest combination (aka highest performance), but can match it then to every rpm/load-situation, stretching the bandwidth 3-4 times (to a few 1000rpm). But it´s very few people doing that (the pipe from the port to the chamber is a 2-piece pipe, gliding in each other, so the exhaust can be short or longer, depending on engine load/rpm). Normally done solely in previous Eastern Germany (2stroke-tradition cause of the decades-long trade-embargos of the West, that made 4strokes unreachable) and Holland (racing-tradition on 2strokes). Look for "Variable length two stroke exhaust with servo", you´ll find 2 video´s in YT, and there´s a few more...
Living in a railroad town in the 50-60s railroad brakemen had a portable pulse jet for heating up frozen running gear on train cars. Our town also had a pickup truck mounted pulse jet that expelled DDT for mosquito control..
Anyone else thinking of Colin furze pulse jet bike right now ?
But with our beloved "main presenter" giving a great ignited expand./ retracte restart blow by blow description of the entire pulse jet engine process ..
There's a old guy named Robert Maddox who put a pulse jet engine on a go kart and goes to the salt flats early in the mornings to drive it around. He put them on skateboards, sleds, all kinds of things. Living his best life you could say. He has a CZcams channel, highly entertaining, definitely recommend it. PS I love the look of satisfaction on your face when that thing starts up flawlessly.
Yup, Rocket Man.
British CZcamsr Colin Furze did something insane with a valveless pulse jet . I won't spoil the video but it's worth a watch .
@@TechIngredients I was super impressed at how reliably it started, but underwhelmed at only 30 pounds of thrust. Can't wait for the augmenter. There was discussion of using an augmenter on canard aircraft piston exhaust to increase cooling suck from the cowling.
rocket man, burning up his propane out there alone.
@@balaclavabob001Excellent video! He also made a turbojet in his shed that was hilarious when he fired it up.
bolt your test platform down in the back of your pickup, that way you might even be able to show a "practical" implementation using the thrust to power a vehicle.
Just wait...
If my calculations are correct, when this baby hits 88 miles per hour, you're gonna see some serious shit.
Would your vehicle remain "Street Legal" at that point? But the real question would be could the police catch you to tell you it wasn't legal anymore? LOL.
If you can build a muffler for a pulse jet that doesn’t kill the power output, you’d really have something fun to drive around town! No more tailgaters either. Or at least not repeat offenders!
@@robertedwards7749 they might keep a fair distance to you, with lights and sirens on, the sirens you wont hear though. having a glowing red pulsejet engine on your back speweing flames .... yeah 50m minimum
"let's go outside and annoy the neighbors!" I love it...
When I was a youngster, sixty years ago, I really wanted to build a V1 on a test stand. Thanks, I love this!!!
Perhaps a good starting point to go forward safely is to anchor a table with short legs.
For a pulse jet, there's an optimum length and shape for the tube, and the cylinder isn't it. It's simply the cheapest.
Yours was by far the best explanation of pulse-jet operation I've heard yet!
There's an optimum for power output, an optimum for power-to-weight ratio, an optimum for fuel efficiency, an optimum for cost...
Since pulse jets are usually used where cost optimization and ease of production are more important than power or efficiency, I'd argue that a cylinder *is* optimal. Rockets are better for power but inefficient, turbojets are better for efficiency but expensive, etc.
Surely the cylinder is most practical, unless you want to compensate for differences in soundspeed in the variously heated portions of the chamber. This is like making a transmissionline, as in acoustics. Tuned to a frequency by the length of the tube. Like a flute even.
Everyday is a good day when Tech Ingredients has a video out.
"Hello, 911? Yeah, it's me again. He's blowing something else up. "
Well it wasnt illegal the last 6 times you called so please stop.
@@thetruthexperiment "Noise complaint? ... Noise complaint..."
Gentlemen, I hope you appreciate the opportunity presented to you to be able to work with your Dad, the presenter.You will look back on these times as some of your most precious memories. Your father is a genius with a curious mind in many different fields and also a great teacher. Without even knowing him I love him. He reminds me so much of my own father who not only was a genius and excelled in his chosen field of chemistry, he was also a teacher and an athletic coach during his life. He touched many lives. You all are living special lives, cherish every minute together if you can.
"Ask Questions, Question the Answers!!!"...an excellent indicator of all true scientific inquiry!!!
And answer the questions, eventually :)
You guys are awesome, bringing High Technology to the realm of the back yard mechanic.
I'm from New York, if you guys ever did a Tech Ingredients Festival I would be there.
I love this video it may be one of my favorites from you so far. I appreciate so much that you admitted you were wrong, and showed that being wrong isn't a bad thing either. You had an idea, tested it and found your result. Even though it wasn't the one you wanted. Then stopping the tests to make sure you all stayed safe I hope so many take away these great examples you're setting.
I absolutely love this channel! Its always so fun to see what's next!
Always a joyful moment when I see you guys upload a new video! Thanks for your ongoing efforts.
looking forward to your next upload, best of luck with the project and well wishes.
Cant wait to see the augmenter in action. Great video as always. Thanks guys!
Love this channel!! Great work!
That power is insane, you could almost feel the vibrations through video haha. I love that you're making more jet engine related content again by the way, keep it up.
It's such a joy watching this excellent channel grow.
Mad scientist!!! Love your work. Educational and entertaining
Absolutely love this channel
I love this channel's absolute in depth nitty gritty explanations, it's always the little basic things that can catch you out on a project, but they cover everything, plz never change
You do everything I think about. Glad to see you enjoy yourself learning new things and applying your knowledge to what you do.
Love this series and the quick updates!!!
Amazing demo of a pule jet. That's nuts!
I fully appreciate you STOPPING what you are doing as opposed to getting into the "get it done" mindset. Very nice showcase of proper procedure.
Cant wait to see the next experiment. More power to you !
very cool. i appreciate the precision you use with language when you explain things. you are very good at explaining things.
Wonderful video as always. Can't wait for the next one! I hope that possibility of double the power output turns out true
This was a beautiful test thank you
Great job as always!
Awesome. And I like the commitment to safety, that might be the most important message in this video
Beautiful. Keep it going!!!
Another excellent video, guys.
I am happy to see Safety is not last, have fun be safe love the videos, and can't wait to see the next one.
Love the new short vids. Keep em come'n boys 👦 🔥
Great stuff as usual...
Once again,very cool,very funny,and best of all, very safe...who knew?? I think the two of them are beginning to "get" humor. keep em comin!! thanks for making my birthday great!
Great Lecture!
Love this series, the engine sound is so intimidating.
Best explanation of a pulse engine i ever heard 👍🏼❤
This channel will reach 3 million subscribers at least I’m surprised it’s not there already, I really enjoy watching these experiments and how you go into depth on them? And such a variety of experiments as well, thank you.
Great video, nice explanation. Thanks
Thank you for sharing this video! It's fascinating to see you experimenting with a pulse engine. I appreciate the emphasis on safety and cautioning viewers to be careful if they try to replicate the experiment at home. Looking forward to watching your next video and seeing how you plan to increase its thrust. Keep up the great work!
Such a nice adventure, the priceless smile on your faces. The strong vibrating table was for me a concern too. And now op to the million+ subscribers. we can’t get enough of these “ naughty “ experiments.
Very good to stop and make it more safe. We don’t want you become airborne….
That was fantastic. I love pulsejets to no end. I'm sure everyone within a mile of you is substantially less in love with it right about now, but I sure enjoyed it. And yes, I totally understand your hesitation in running the augmenter on that setup. Might be best to anchor that table to the ground with some concrete anchors or something. Because that getting out of hand could be very deadly. But awesome video anyway. Really looking forward to seeing what happens later with the augmenter. Great video!
Grate video. I had built one a few years back and it was fun. The main prolbem i had was bending the reed valves (triangle springs) from the heat and pressure. It defiantly had the whole neighborhood calling the police on me. Mine failed spectacularly. 😊
I love these videos, Good Stuff
Looking forward to that next video, thanks
Another exciting video, can’t wait for the follow up.
Can't wait, stay safe. Thank you
Quite a work! Thanks a lot
That sound was unexpected! Very cool!
These videos are not only educational, they're so much fun!
Can't wait to see the augmenter in action. Best of luck!
I greatly admire tipping your hat to safety, bowing down to the "by-the-book" hunch, better to regret not doing the test that day then regret any other outcome. good job boys
Almost 1M subscribers. You deserve it.👍
The first pulse jet I built was made out of an empty brake clean can, some conduit, and some muffler mender puddy. I had about 2.5 seconds of resonance before it blew apart. All of the mechanics in the shop all threw their hands up and cheered 🥹 it worked perfectly!!
Top video, love these crazy pulse jet engines ;)
Great stuff! Thanx for sharing!
In the 1960s, some model pilots built pulse jet engines with star-shaped flutter valves. However, these valves only lasted for a very short time for one or two flights.
So, with modern materials....
5 flights🤣
this is the best explanation of a pulse jet engine ever!!!
Loved this. Glad tou mmare making a part 2 with the augmenter. Want to see what level of force it can generate
Fascinating and exciting. Thanks for sharing. I’d love to know more about the early history of the pulse engine.
A new Tech Ingredients so fast? Makes sense since you had the equipment on hand from the last video, glad to see it.
You mean *the ingredients*? Eh? Eh?
@@joelandersson3474 hehehe yes hehehe
I've ALWAYS been interested in pulse jet engines and you explained how the actual science works very clearly, thank you!
You guys like playing with fans, hot things, and thrust... I'm sure you guys have seen the turbo burn barrels that were popular on the net a bit ago and I think you guys should try to make one but put your own Tech Ingredients spin on it.
If anyone isn't aware of what it is, it is a barrel full of wood that is sealed except for one hole which is fed into a turbocharger. The turbo is spooled up with a leaf blower which pushes more air into the barrel which makes the fire burn hotter which spins the turbo faster and faster. They are crazy.
They are.
The major issue is turning them off! Unlike a fuel line with a valve, the only option is to block the intake of a running turbocharger, and that can momentary over speed the compressor and turbine.
@@TechIngredients I can't remember which video it was, but there was a group that made one that quickly got out of hand and it definitely seemed like they were having a hard time stopping it. I wonder if a high strength valve of some sort could be placed in between the hot side of the turbo and the intake from the barrel so the source of the high pressure gas could be stopped.
I've always been interested in the operation of turbochargers whether on car engines or when people repurpose them as a jet engine or a burn barrel.
@@TechIngredients whood is lame! just put a nozzle in the barrel and pump any flammable liquid, it will burn fine and its painless to stop.
Oh wait that its just a jet engine with extra steps.
@@TechIngredientsBlocking the compressor section inlet, will cause an instant "compressor surge", wich is a kind of compressor instability phenomenon, with inlet flow reversal, highly probable to damage shaft bearings and seals.
In commercial airliner engines, compressor surge can be experienced in rare occasions by simply altering the inlet flow direction (by getting the Angle of Attack of the airplane too high, or by sidewise wind during take-off or initial climb. But modern jet engines being of the Axial Flow design, the surge phenomena is of a slightly different geometry than in centrifugal compressors, but on the Pressure-Flow diagram, both are the same "surge" phenomena.
I think instead of blocking the turbo, have a lid that clamps over the end of the barrel, so nowhere for the 'exhaust' to go.
Yay! Always get a little excited when I see a new Tech Ingredients video uploaded! I wish I could be this fellows neighbor! We’d get along very well I suspect!
That is so mean! 😄 Can't wait to see part 2 of this one.
Man realy hope to see the next video soon so hype
Thanks for another awesome video!
One of the most satisfying moments is the genuine mad scientist laugh... 😊..... of course the son's very genuine 'nope , nope , I don't like it ' response is very reasonable and also satisfying 👌
You all are having way too much fun!
This has remained my favorite channel and I'm confident it will continue that title.
this channel rocks.
13:20 The laughter is so genuine and infectious! 🙂
Looks great! I recommend only one thing: fire extinguishers at the ready. If the vibrations loosen a connection or who knows what. 👍🏻👍🏻
Very similar to two stroke engines with a Reed valve. Great video.
Love you guys, Also from NH
The previous jet engine was a small engineering marvel and looked more efficient too but i can't not fall in love with the angry tube, brutal!
Pulse jets are their own whole level of awesome. A good scientist is always learning. Just as you do.
11:54 Definitely a good idea to be listening to “Silence” by Acoustic insulation when performing a noisy chore like running a pulse jet engine.
The Reed valves the resonance chamber and the simplicity really reminds me of the 2 stroke engine. :)
Excellent. I've found my new favorite white noise. Thirsty little thing. Keep 'm coming
It's also about time to think of a bonus video for hitting the 1 MILLION subscribers target!
Well, almost... but they stopped! LoL
But this one has staying power!!
When I watched the first video I thought you were being quite ambitious with your test bed.
Obviously it could handle it, but it didn't seem to me to be something I'd personally like to use repeatedly.
When the pulse jet was put on it, yeah, that's when those tolerances were put to the test.
Buy some relatively cheap i-beams and dig some nice holes in the ground to seat them in, it'll be faster to weld them together than bolt them, but with some water ballast at the front of the frame it should easily hold it where it needs to be.
My misses was laughing her head off watching me nerd out with this.
Love your videos.
From the moment I heard about pulse jet augmenters, I've wondered how a full-length augementer would behave. Basic idea idea would be to increase the mass flow rate ad a normal augmenter does but also serve to cool the engine and draw a stronger air flow into the intake. If I recall correctly Messerschmidt had some interesting patents to that effect just after the war.
Wow that was loud. Really cool explanation of the mechanism too.
Some hefty diagonal bracing, maybe even extending further behind the table?
A little update on the Flash Graphene experiments, I have a workable setup to safely discharge as many caps as I may care to through the sample in one of two different directions, either through the same axis as the compressive force, or normal to it. I'm building up the number of caps at the moment, I have the PCBs for a modular cap bank, adding 10 x 1000uF per board, but only have 2 of 20 populated so far. Kemet caps are not cheap but chinesium caps are not an option. What I do have is an old low-tension AC variable supply with a relatively hefty output, so I thought I'd see what just passing current through a sample continuously did. From what followed, combined with a pre-print paper that came out in April this year (the first I've been able to find on the subject) it seems that the conversion from carbon to graphene has far, far more to do with the electric field than it does with the heat generated. It's referred to as Joule-Heating, but if the same amount of energy is used in a purely thermal reaction the amount and character of graphitization is very different from a thermo-electric reaction. The authors of the paper posit that the electric field reduces the activation energy for the carbon phase-change reaction dramatically. Yields of turbostratic graphene from a purely thermal reaction = 5% while from the thermo-electric reaction = 98%.
They were able to synthesis not only the turbostratic graphene arrangement but more ordered forms right up to graphite, using electricity, while they were unable to supply enough energy to accomplish this thermally.
My next step is to make a version of my setup that can pulse the power through the sample, as, apparently, this is how the more ordered forms are created. I have a feeling that this is the right avenue to pursue to be able make large, defect-free sheets of single-layer graphene, too. That would be take a very strong field, though, I think.
This opens up many interesting possibilities for a process that is scale-able, and the market is in a state where many companies are offering single-layer graphene, while seemingly none are able to actually supply it. There have been quite a few investigations of the global market offerings, but after characterizing them all few-layer was the best quality obtained, with some samples not even being pure carbon, let alone a high percentage of graphene.
Here's a link to that paper I mentioned: www.researchgate.net/publication/378528487_Electric_Field_Effects_in_Flash_Joule_Heating_Synthesis
Now, if you could just come up with a way to make a DIY Raman spectroscopy setup, and maybe something to measure X-ray diffraction, please?
Watching the newton force on a table that weighs 450 lbs, your thrust to weight ratio looks to be .08. That will be a brain rattler but wont move the table due to your friction blocks. I am afraid, like you, if the augmenter doubles the thrust, you could lift an end of the table and, once that starts, the ratio could go easily over 1 and cause a full flip or worse! Possibly some anchors in the pavement would prevent that but you will also need to strengthen your recoil springs on the force block to lessen the "bucking" from the pulse. It looked like, for a moment, there could have been a harmonic event with the pulse cycles thus amplifying the vibration in the table. You make me ask questions on every show! Love it.
This is so cool!
This channel has awesome builds but the explanations really set it apart. Thinking about the speed of sound in air as a function of the energy of particles bouncing against each other makes so much intuitive sense yet I was never taught it. And to do it all in one shot!
Can't wait for the follow up!
Next week: We build an anti matter warp drive for my truck! Your channel couldn't be any better. Stay safe and keep having fun.