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decook1110 wrote: He also mentioned how Gene seemed to be having a hard time getting his 130R's working and that he had to do some mods to get these working. He didn't do a very scientific test on the engine, he only ran one engine at a time and used a bathroom scale against the planes nose to measu...

Luc, Hooo...one more thing, I guees you have figured that one out... But in case you need to know, there is alot of air coming out of the 3rd stage at max power. During warm-up, the intake stack is capable of maintaining the flame front inside. But this thing spit like a dragon at max power. One thi...

Viv, If the two peeks coincided but were antiphase they would cancell and reduce the the size of the resultant not increase it. I don't get it. Don't the peaks shown at ~431 and ~460hz on the spectral curve correspond to the peak of the sound wave (in phase) and the troughs in between correspond to ...

Viv, Luc, OK. I will try to give some more acoustic imput after my debacle with the tuning calcs with the Riley Manual info. I have attached a file showing Luc's engine's sound file as Viv just posted, but with my own comments. Note that the Third harmonic is really close to and unknown second sourc...

Luc wrote: we ran during summer time but at that time, we had serious problems with our LoadCell set-up, but the values recorded then, never was close to the 130 lbs. expected. Also remember over a month ago, we ran the engine inside (@ 70 °F) but still had that poor 45 lbs. of thrust. Even if I be...

Hi Luc, Have you run your tests in the Summertime? Your low jet temps got me thinking (I know, a dangerous thing). While I don't think this is THE problem, low tank temps can certainly be A problem. Low tank temps mean somewhat lower fuel jet velocity which means slighly misadjusted 1st stage tuning...

message for RAYMOND .
are you able to UNZIP the file i send you ?
if not let me know , i have talk to a guy at work and he have explain me how to do for unziping it in one single file .
PATRICK .

No Joy.

Raymond

Danger! Danger! Danger! (well, maybe not that severe) Okey ... I think we are not on the same values at all. But I am not saying I am right. Okey, here are the numbers Viv and I talk about this morning. Luc, Your numbers are correct. I was using the equation out of Riley's manual, and IT IS WRONG!!!...

Hi! I'm not an Acoustic Expert, but I play one on TV! ;o) Quick observations: Using the frequency equations from the manual, I have calculated resonences from the test run to compare to the sound file. See attached Excel file below: Note: These values are incorrect!!! See post below Stage 1 Resonenc...

Luc wrote: I also have to ask ... Were is Graham and Raymond. We have all the data we wanted. Now we need support and I am also preparing the engine with the other coils for further test. Don't let us down guys ... we need you. It's good to feel wanted :o) Sorry, other things have kept me a little b...

Luc Wrote: Is'nt that great ... Why did'nt we think of that one sooner ... he he he. As Homer would say, "Doh!!" I was wondering the same thing myself when the thought came to me. Patrick Wrote: ok right now i'M trying to send you the program . i have call my internet companie because i was unable t...

Does anyone have any sound recordings or video (w/sound) of a "working" Gluey, ANY model? If we have a recording of a "good" engine (again ANY model) then we can back out what is going on so that we know EXACTLY what to look for in the 130R recordings. By working model, I mean one that develops clos...

Patrick,
I believe I can recieve emails of 12 megs. I have a call into my ISP to verify, but they havn't called back yet. Please send if you will.

Thanks,
Raymond

Hi All, It's been a bit since my last post, so... Luc, Dave and Patrick, Thank you all so much for running these tests AND sharing your experiences. It is the cooporation that we see here that will do more for developing these fun little engines than any amount of competition, that keeps important i...

I've been following the sound recording conversation and wanted to add some things. First, there has been talk of using a FFT Spectral analysis to look at the waveform to find resonent frequencies. Does anyone on this list have the software and the expertese to do this? Is there a specific file form...