Experience Thrust with a Successful M40 Pulsejet | Metiz Design

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The discussion centers around the successful operation of a self-sustaining M40 pulsejet engine, with the creator adjusting the injector for optimal thrust. The engine's thrust is demonstrated through visible shaking of a bicycle during operation, although the exhaust appears non-steady. Participants express interest in building similar engines for RC airplanes, noting the inefficiency and loudness of pulsejets. The creator uses an LPG tank for fuel, emphasizing that a larger amount is necessary for ignition. Concerns are raised about noise levels and potential neighbor complaints, but the creator mentions operating the engine away from residential areas.
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this is my second pulsejet which is self sustained..iam just holding the injector using the air gun..and trying to adjust the injector for good thrust.this is a successful thrust you could see the cycle shaking due to the thrust produced by the engine..this will be clearly visible from 0:50..

design by: metiz (thanks for the help sir)

 
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That's cool, the exhaust looks non-steady tough, I'm sure you can improve it.

I wanted to make one too and build an RC airplane around it but they are very inefficient (and really loud)
 
Curl said:
That's cool, the exhaust looks non-steady tough, I'm sure you can improve it.

I wanted to make one too and build an RC airplane around it but they are very inefficient (and really loud)
you can fix it in RC planes it will be cool..because in my video you could see the engine thrust shaking the bicycle..
 
Very cool. Can you lengthen the exhaust a little for sustained combustion? From what I understand a good portion of the exhaust resonates back up the exhaust tube to compress and ignite the next cycle.
 
Phrak said:
Very cool. Can you lengthen the exhaust a little for sustained combustion? From what I understand a good portion of the exhaust resonates back up the exhaust tube to compress and ignite the next cycle.

the engine was actually self sustained but i was not able to take that video because it was exam on that day for me,so we were not allowed to take videos..But this video was took two weeks before,in this video it self sustained but i was adjusting the injector to check the thrust in different positions..
 
ganuganu said:
the engine was actually self sustained but i was not able to take that video because it was exam on that day for me,so we were not allowed to take videos..But this video was took two weeks before,in this video it self sustained but i was adjusting the injector to check the thrust in different positions..

My mistake. Still very cool. It's difficult to tell the proportions from the end-view. I would try to make one myself but I couldn't get away with it. It would really piss off the neighbors.
 
here are the pictures,you could see the engine clearly..
 

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Very nice weld work. Do you have a small propane tank you can mount on the bike?
 
Phrak said:
Very nice weld work. Do you have a small propane tank you can mount on the bike?
iam not using propane tank,instead iam using LPG tank(15kg)..
 
  • #10
LPG is short for liquid propane gas. You can buy these in little 14 and 16 oz. canisters that might serve will on a bicycle.
 
  • #11
Phrak said:
LPG is short for liquid propane gas. You can buy these in little 14 and 16 oz. canisters that might serve will on a bicycle.
i think its liquefied petroleum gas..because it contains mixture of propane and butane..this engine requires more fuel 16oz is not enough to start the engine..
 
  • #12
Wow. You're right. All this time, I've been wrong.

Good grief, if it takes 16 oz. just to start it up. You're neigbours must be up in arms and ready to roast you for dinner.

Seriously, you are really pissing them off with the horrendous noise. They don't have to say anything; they're just building up steam ready to burst each time you fire it up. They will eventually compare notes, and shut you down with lasting animosity toward yourself and your parents. You should consided playing elsewhere, where it's not so noisome.
 
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  • #13
Phrak said:
Wow. You're right. All this time, I've been wrong.

Good grief, if it takes 16 oz. just to start it up. You're neigbours must be up in arms and ready to roast you for dinner.

Seriously, you are really pissing them off with the horrendous noise. They don't have to say anything; they're just building up steam ready to burst each time you fire it up. They will eventually compare notes, and shut you down with lasting animosity toward yourself and your parents. You should consided playing elsewhere, where it's not so noisome.
i started this engine in my collage not near my house..so no problem for me..:cool::-p
 
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