Please put your "I am new and need help" question here.

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metiz
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Re: Please put your "I am new and need help" question here.

Post by metiz » Sat Jun 26, 2010 8:02 pm

Hello Mitchell

your engine isn't running, it's just growling. I seriously doubt that you will get it to sustain even on idle and forced air with a combustion chamber that small. it is just not getting enough compression.
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Avengeddeville17
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Re: Please put your "I am new and need help" question here.

Post by Avengeddeville17 » Fri Jul 02, 2010 1:28 am

Hey my name is brad. I have built a few small valveless pulse jet engines to practice for my first big one. I have the majority of the engine built but haven't decided if I want to go "valved" or "valveless". My question is, what produces more power? If you could help me out that would be greatly appreciated, thank you.

metiz
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Re: Please put your "I am new and need help" question here.

Post by metiz » Fri Jul 02, 2010 8:13 am

I you have most of the engine build then you don't have much choise. depending on design it's either valved or valveless. do you have some dimensions?
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Re: Please put your "I am new and need help" question here.

Post by akhil » Sun Jul 04, 2010 7:04 pm

hi
how can i buy spring steel for pulsejet
i need your help!
i think it must be blue tempered spring steel c1095(0.20mm-0.15mm)
but i don't found it anywhere... :?

metiz
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Re: Please put your "I am new and need help" question here.

Post by metiz » Sun Jul 04, 2010 9:36 pm

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Re: Please put your "I am new and need help" question here.

Post by Mark » Mon Jul 05, 2010 4:32 pm

Presentation is Everything

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Re: Please put your "I am new and need help" question here.

Post by parabellum » Mon Jul 12, 2010 8:47 pm

Considering the heat production of running PG, was somebody trying to inject water in order to raise thrust? Is it applicable in this type of engine?
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parabellum
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Re: Please put your "I am new and need help" question here.

Post by parabellum » Tue Jul 13, 2010 3:00 am

Ok. The answer is yes, they did PJ with water injection and it raises more questions. Is there significant performance raise? What are pros and contras of water injection? Can be water injection continuous or only a short bust and engine cools down?
“The significant problems we have cannot be solved at the same level of thinking with which we created them.”

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Re: Please put your "I am new and need help" question here.

Post by Deepu » Sun Oct 03, 2010 4:11 am

I'm planning to use a liquid fuel(most probably kerosene...) for my chinese valveless pulsejet.Is this a good choice? what are the safety precautions to be followed while using a liquid fuel?


P.S: propane is not available in my place,L.P.G is the only available gaseous fuel.

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Re: Please put your "I am new and need help" question here.

Post by Mike Everman » Sun Oct 03, 2010 2:06 pm

Liquid fuels scare me because they stick and burn. I suggest gloves, glasses, hat, ear protection of course, and long sleeve cotton shirt that you can strip off in a hurry. You may never have a problem, but please treat the danger with utmost respect.
Welcome and happy pulse jetting!
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Re: Please put your "I am new and need help" question here.

Post by Deepu » Mon Oct 04, 2010 2:25 pm

Thanks for the reply mike.I have one more query.Is there a chance of fire getting into the L.P.G tank? do you guys employ any safety valves to prevent this from happening?

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Re: Please put your "I am new and need help" question here.

Post by Mike Everman » Mon Oct 04, 2010 3:09 pm

No that cannot happen. There is no oxygen in the tank. The greatest danger is accumulation of propane around you in still air. Always experiment outside.
Mike
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Re: Please put your "I am new and need help" question here.

Post by Deepu » Tue Oct 05, 2010 3:03 pm

Thanks for the clarification Mike :D

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Re: Please put your "I am new and need help" question here.

Post by keith mcconnell » Wed Oct 13, 2010 4:36 pm

how to you post a jpg photo. I tried to attach it but it say its invalid file. Am I doing something wrong?

metiz
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Re: Please put your "I am new and need help" question here.

Post by metiz » Wed Oct 13, 2010 6:01 pm

check to see if it's 2mb or less
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