www.pulse-jets.com

Yes, I have that book. Yes, i saw the scaling factors. Ok thanks for help.

Thanks John for reply. I thought that tips can't be 'blunt", but i wasn't guaranted. Also I'am trying to redesign the CC sustaining other working jet engine drawings. Also, maybe you can say how to calculate diffuser angles knowing about compressor nothing?
Ainis.

Now fuel ring has ~30holes 2.5mm diameter. Today I starded the engine. It seems that engine can sustain its speed, but NGV and turbine wheel starts to glow red. EGT is over 800C. If I help engine to acelerate with shop air, glowing disapiers but only until engine is rotating at higher speed from its...

Iam spooling it with shop air. No, now it dont speed up, It just throw flame through the turbine, but i think more holes in fuel ring maybe will make better job.
check the mail, i wrote my story

Thanks Johansson for mail.
I drilled about 14holes in size of 1.5mm in fuel ring, And it looks that now it works better, but not good enough. I think tomorow i will try to drill more holes

No, i talked not about combustor holes, but about gas delivery ring. Mine e-mai is AinisStel@gmail.com or skype BLITZ-as
Thanks.

I saw flame not in the combustor output, but in engine output. I think the problem is that fuel ring holes are too small, that makes gas speed higher than burning speed and that makes that the gas can't ignite at a combustor begining. I'll try to makes holes biger, and drill more of them.

Thanks, Johansson. I tested not a seperate CC, but all engine. I think, i will try to make new CC.

Yes, injetor ring is inside the combustion chamber. The problem is that flame out is not in all turbine output, but about 45degrees of it.

Propane injectors is just 7 ~0.7mm holes in O shape 5mm tubing. Holes looks toward to combustion chamber front, you can see that in first sketch. I market them with 2 lines at top and bottom

Well, i made few tests, but all times i had flame out, but only in one side, about 45degrees of circle. For fuel Iam using LPG gas. I add sketch to understand the problem.

I hope, you can help me :/

Ash, you wrote that minor diffuser radius was made by hand. How do you did that? With rasp?

This is what I have done at this moment: http://i36.photobucket.com/albums/e19/Ainis/this.jpg The CC loks terrible and its made from 0.5mm sheet metal. But it's only for testing. Now it hasn't got any vaporizing tubes, becouse I will test engine on propane. If engine will run good, I will make the C...

Thanks, Johansson. Today I cut slots in NGV for vanes at 25degres. Its my first jet engine, so Iam not going pretty fast

I made some progress on the engine: