New Rocketman show starting 2017 900lb thrust twin Pulsejet engine .
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- čas přidán 9. 02. 2015
- Most powerful pulsejet engine in the world?
Bob Maddox of Maddoxjets.com test firing his 900 pound static thrust pulsejet engine out in the desert.
The engine is using 6 Gal/min of gasoline and making 900 pounds of staid thrust ( the V1 engines made around 550 static - Věda a technologie
"Believe it or not, these engines are going on a sailboat" you sir, have got a subscriber
lol, he had me at "the world's loudest sailboat"
I'm in, he's got 2.
I'm ready for that video update
Well what gets me is, sail boats are usually eco friendly, using wind for power.....
Runs engine for 30 seconds, "yeah, it burnt about 2 gal in the time it was running.
(Assuming the intro vid was taken after the test vid. Like most channels do. Edit later. Boom, decent vid.)
Love the channel man. Been a fan for a while, just not on this account, lol.
link to boat mount czcams.com/video/qnG8Wxe3L0A/video.html
Oh, wow the USA has their very own colinfurze! Cool ;-D
Yes, I was doing all this many years before Colin and all I here is how I'm copying Colin, By the way I LOVE Colin he is the man!
Robert Maddox Hey... I don't remember saying your copying him. You both build loud and crazy machines.
Outland hes just saying he gets that alot
Now this is really amazing! Thanks for taking the time to make this video. I'm thoroughly impressed.
Imagine how scared the British were when they heard the V1 Rockets come in.
@Howard Pearcey I thought it stopped due to fuel starvation
@Howard Pearcey
Hearing one would be bad because you would know what was coming... I think the V1 sounds intimidating in flight - but that dreadful moment of silence to follow would be quite horrible though I agree...
Yes the shake was crazy, I made it out of thin material for weight, I will put two wide strap motor mounts, one just behind the cone and one midway down the pipe, that should control the shake.
Where did you go to test this? I have no idea where I would go in my area that I would be allowed to test something like this. Do I google public use land or something?
Robert Maddox out of interest what grade steel did you use for this? also you may have been close to a resonant frequency for that diameter, if you had it smaller and longer you may be able to push it harder, temperature allowing.
Hey Rob
Is there any way of improving the fuel efficiency
Robert Maddox the welds bud you must be a master welder to make welds hold under that much rapid flex
+Paul Anthony the only way to do that is to add a turbine driven compressor, more air to fuel= a more complete fuel burn which in turn creates more high velocity thermal energy per pound of fuel burnt.
full throttle sounds SO awesome
pulse jet= jet engine using taco bell as fuel.
lol
This is awesome! It’s crazy how much the forward side of the tubes were flexing. Curious to know what the durability of the engine ends up being after a few hours of use. A little worried that some welds may crack open with all the intense vibration but I would LOVE to try building a pulse jet like this! Great job. 👍
Wish I could see more frequently thanks for the videos definitely want to see it pushing that sailboat
jeez, made my day. staying tuned for more. happy to find you.
wow........ I cant wait to see this thing mounted on the boat. awesome vid
mounted on boat czcams.com/video/qnG8Wxe3L0A/video.html
It's time for dubstep
Here's a thought:
Pulsejet Orchestra.
Pulsejets that fire at different frequencies to produce different pitches.
I wonder; would it be considered a wind, brass, or percussion instrument?
a combustion instrument
+Angelo Cancio A percussion ( err... repercussion ) instrument.
Definitely a brass instrument
Love your work!
This gives a brand-new meaning to "chariots of fire"
Wow, I want to see one of these in person!
Please post footage of this once it's mounted on the sailboat, because I'm having a hell of a time trying to visualize how it would work. I don't know a lot about sailing, but wouldn't it be hard to keep the boat balanced and under control with such a powerful thruster?
here it is czcams.com/video/qnG8Wxe3L0A/video.html
When I first hear it.. Im like thats a damn loud pulse jet.. Then he hits that "note" and omg was in disbelief.. Would LOVE to hear this in person...
1:48 love the boom. Makes me wanna build one too, just for fun.
Another way of making that dubstep wobble bass :))
9 years have passed and the shockwaves are still traveling around the Earth.
A "Buzz Bomb" you can ride. Impressive !
sounds almost like the 30mm cannon on the A-10 warthogs
Those welds around the combustion chamber area looked like they were about to give out.
Looks/Sounds like a good way to break up a riot!
The sound of a V1 Rocket
holy shit that is fucking crazy! this is taking pulse jets to a whole new level!
Hi Robert, love these videos, and love your engines. I have been thinking about putting one of your engines on a full scale home made plane. I just noticed in this video that these engines seem to flex a bit. You probably are already aware of it, I just thought I'd mention it for the sake of it. Thought maybe with these bigger engines, instead of going up in thickness of the walls of the combustion chamber ect, you could maybe add 1 inch strips of metal weldded vertically down the length of the engines following the contours. Preventing some of the flex whilst keeping weight down.
Wow see that thing vibrate is crazy lol wow nice work. Sail boat hahaha nice ! ~Russ
Nice pulsejets
the echo from those would be awsome
Great content, these are pretty intriguing engines. Seems like a risky endeavor putting something like this on any kind of boat though, with how much heat these put off.
Awesome Bob! Can't wait to see them on a boat.
+MrBen527 Wow and people think what I do is crazy ! Lol I guess it's my Huge fear of getting burned ! You guys got balls MrBen ! Still looks like fun.
Prog X
Thanks!
how exactly do you control the fuel flow? and was the forced air coming from that little air tank?, i find it insane how you build this, its amazing, i would love to know how one of these is constructed
I take it by the noise they're making, that they are 'valved' pulse jets.
As opposed to the 'U' shaped ones I usually see on Youboob.
As a matter fact i think this is the first 'valved' pulse jet I've ever seen.
Richard Hutchinson Valved. Check out the Mythbusters on this, it may be the same guy.
would you ever consider releasing plans for this one?
Nice Work.Sounds Powerful.Dying to see them in Drag Racing one day.Its where they belong.Next to a Turbine Jet .
omg, i will volunteer to drive a go cart with this on it
That's awesome! Maybe add wheel chocks to the list of needed safety equipment. haha
Nice subwoofers!
Wow this is real one
Have you considered starting it on gasoline and after it heats up switching to diesel? Might get a longer run time/ more thrust.
Watching this gives me crazy ideas for my future 1/4 scale FPV SR-71 build.
Wow, the sheet metal from that whole engine is shaking and trembling. Funny to watch how the shock wave lifts the sand :-) Ever tried a mix of different fuels? Or doesn't that make any difference? Also would love to watch it operate in super slow motion, just to reveal what the shock wave does to the engine.
Great video!
How did you come up with your 900 lbs of thrust number? Not doubting it, just curious.
That thing is something else. A gallon of gas every 10 seconds redefines gas guzzler.
can I find plans for this particular model anywhere? I'd love to build one with inconel rivets instead of welding it
Nice machine. For airplanes, barely its simplicity could overcome its mad fuel thirst.
Does it make sense a pulse jet working inside a ramjet, intake section of pulse placed on highest pressure zone of ramjet, heat of pulse jet cooled by inflow, it turn red glow, heat of outer layer of pulse jet added to thrust?
Blessings +
My grandfather talked about the pulse jet, the sound of death 💀 when it stopped everyone tried to hide.
awesome!
Will it fit in my honda?
+Alfie Smith MCM rep
anything will fit if your brave enough
Stuff it up the ass, I mean, trunk.
Any idea on the decibels different jets make? How loud are the smaller ones?
Dropping the bass
How long do the flapping vales last? It seems that they have a high inertia from the frequency of pulsating, it sounds the same frequency as the German Flying bombs over London, Now you can guess my age.
How is the structural resonance? Have you ever had one vibrate apart? Why no structural ribs running the length? Are they not necessary?
Have ever put anything behind one of your pulse jets (even the smaller ones) to see the damage?
loVed it! Super!
That thing's gotta get hot as hell! 700 degrees Celsius or what?
Did some math and you can expect about 45mph with no sail and pure jet power. You’ll also consume about 3 gallons(12L) of fuel per minute.
mó zika o baguiu mano
Robert Maddox what is the biggest pulsejet you've seen or built?
Beast
So this is one of the valved engines? What do you use for the valves?
Now thats base.
so this is where all the strange noises from around the world come from
Correct me if I'm wrong, doesn't the pulse jet, self destruct because of the heat it generates
Scary as hell
How thin was the steel on these engines
two minutes longer those things looked like they were going to come apart from the pulses
Could the whole engine be made smaller but with the same thrust ?
That's a gigantic noise generator.
A-10 Warthog rapid firing. Kill confirmed.
o ronco desse motor é simplesmente demais ,adorei
I like that for my flying machine
How much sound decibel radiates such an engine?
Then you can get a contusion))
How can I get ahold of this guy, his website is down, been trying for a bit wondering about the feasibility of a part 103 aircraft powered by pulse jet
Wouldn't a taper and fins inside to make a swirl make a more uniform and condensed pressure wave
Maybe you should test your theory yourself?
looks like the body engine is subject of distortion during full power work, no fear it could explode if working long time ?
Well they can't explode, but yes it would damage itself in time.
Man, you can already see the thing turning temper colours in a few seconds lol
snubbers or stiffeners?
They can and will when the metal gets fatigued , especially with this light gauge material.
Could that engine lift itself vertically?
I would like to purchase one of your smaller jets in the near future, but I have some questions about it if you don't mind answering.
You crazy i have to follow
A pulsejet engine works by making an explosion behind the vessel which has more energy on that one side to push the vessel than forcing the ingredients overboard in that direction.
Anotherwords - the energy output is larger than the mass of the two ingredients.
It works by the equation force = mass × acceleration. It runs by sound waves that match the natural frequency of the return wave bouncing off the open air at the exhaust exit 2:18 and pulling in air from the intake side having one way reed type vanes ( valves) the let air enter from the front that in is mixed with a continuous flow of injected fuel and once ignited from a ignition source like arc ( spark plug) it needs no more ignition as once the combustion starts in the combustion chamber it deflags at a rate lower than sonic and heats the air so quickly as to push it out the back but closes the front vanes sealing the intake mouth so it breathes fresh air in from not only the front nut uses a sound wave that is precalibrated as a open pipe or closed on one end so the near empty tube is lower than atmosphere and pulls air in front both directions and the rear suspension sucks back in part of the flame and fresh air that isnt used as combustion of the fuel ( maybe some but it is a volume if air that is accelerated by heating and providing a net thrust. It does this cycle of breathing from both ends , combusting , expanding in both directions but it closes off the front thus only the rear or exhaust is the flow of gases / air accelerated to, the when it's over the momentum of the moving column of air actually drops the interior below atmospheric creating a vacuum but not only that like a musical instrument, its geometry ( length to diameter ratio) is matching the harmonics that the sound wave once leaving the exhaust bounces or reflects back into the exhaust thus compressing the fuel / air charge entering from the front, more air is sucked back in as well as flame and the cycle starts over. Based upon the size and length of the pipe dictates the pulses per second or frequency. It is a two cycle jet e gine in a theory ( not a 2 stroke gas engine or desiel) but I stead of 4 seperate cycles in a car engine that has intake- then compression then power then exhaust the pulse jet has intake and compression as one cycle then combustion and exhaust at the same times . Pretty simple in basic operation but not in mathematics as they really still to today dont know all the details of what is happening inside the combustion chamber at all times. The Internal temp is off the charts hot. Up to 2000 Celsius or higher. The only jet engine that breathes on it's own without forced air parasitic load. A stationary ram jet in principle altho a ram jet uses a special intake nozzle to compress the incoming air y shock waves from its spiked diamond shaped nozzle on the intake side and doesnt suck in air from both ends but from moving g
Air from hi speed plane at start of ignition to force air in mouth and compress it with no moving parts. The only moving part on the valved pulse jet shown is the flapping vanes opening and closing 40 or so times per second. Their is another type of pulse jet having NO moving parts but has two seperate length intake and exhausts between the combustion chamber acting again like a tuned musical pipe to get work from the so d waves matching between the two ends to meet at same time to compress new air / fuel charge. Wow ....what a novel just written
Bello good
"strange sounds heard in the desert sky trumpets?'
Sounds better than dubstep
How much thrust do these make?
Damnit son 🤘
Me and the boys going to London
I wanna see these in the bed of a pickup for a drag race!
Stealth engines on an Americas cup boat? lol 👍
Congratulations! Your the first person in history to use the word "Stealth" in relation to a Pulsejet engine.
Thanks!
Stealth? You misspelled deaf
no.. you see his genius. they are so loud they will make everyone deaf so no one will realize its coming :P
Green Silver It's so loud it echos everywhere so you don't know what direction it's coming from.
Kind of like how radar jammers work, they don't hide your aircraft, they just fire out tons of radar and blind your enemy so they cannot get any accurate information on your range. like shining a bright like in someone's eyes.
You guys are all geniuses.
How loud are these in decibels?
so is there a way to 'idle' these up and down? or do you just find that happy area of fuel/air mixture and thats it?
chaseme81871 I think the innards are so simple, that you have a narrow range between idle and maximum thrust, where you’re more or less consuming the same amount of fuel.
WOW!
are your tires chocked?
I think there is some serious potential for pulse jet technology as a means of transportation in the future.
jetpacks?
+Clayton lanz They are super loud and inefficient, which makes them impractical for most things. They are cheap, light, and simple though.
+lobsterbark stick an axial flow turbo charger on one end of a valveless pulsejet preferably a U shaped one and you can get much better efficiency
100GTAGUY But you can way better efficiency with a normal jet. Pulse jets are really cool, but impractical for actual planes.
+lobsterbark Yes there compression ratios suck but there's barely any moving parts. If they came up with an innovative aproch to increase displacement and compression there would be some serious use for these. they remind me of expansion chambers on two strokes in the last 40 year the tech for expansion chambers has developed drastically by fine tuning the shape of these tuned pipes increasing power.
Boanerges! SFC?
Is that Colorado
This would be a pretty bitchen/scary ultralight engine! Wonder if an engine like this has been tried on an ultralight? Seems like that engine would be very light for the thrust it’s able to produce.
How do I make one of these 😍(but smaller)
Why do I get the feeling it's going to explode any second?
1:48 How I feel having a reaper chilli
1:53 How I feel after taco bell
Dude!!!
Believe it or not thease engines are going in a smart car. XD