www.pulse-jets.com

Great bit of work Grim and Forrest.
Is a W shaped valve block in the offing?

Graham.

Questions about the Rossco injector appear regularly. Perhaps collect all the stuff and make it a sticky under Tools?

Graham.

Hi Forrest.
That impresses the hell out of me. Only one odd harmonic and DC, Hmm.
Is the function reasonably easy to use?

Graham.

The man himself.

viewtopic.php?f=3&t=4212&p=48580#p48580

Graham.

Hi Clay.
You could try this method:

viewtopic.php?f=3&t=2021&start=0&st=0&sk=t&sd=a

Graham.

Agreed.
And finally do you think that the 3rd derivative (Jerk?) in the region near where the valve opens and closes would materially influence the valve life?

Wow, That's a good fit. The second derivative looks very good. I've been wondering if an FFT Analysis of the curves could generate a better fit? Perhaps by creating the curves as abstract amplitude values against dimensionless time then expressing the result of the analysis as a polynomial? Hmm, now...

Casio ExLim. High speed movie recording at up to 1200 fps

http://exilim.casio.com/browse_cameras/ ... lim/EX-F1/

Graham

... Or could one simply scale up the Short Lady design? I didn't think you could really simply scale up a design, since resonance plays a role and I can't imagine that ratio to size is simply linear. I have been searching here for about 20 minutes with no large lockwood plan results. Any ideas? Tha...

Hi Metiz You could try Silicone sealant. Nothing special, the clear stuff you'd use round a bath. In my experience it's tough stuff and will last longer than the glass. If you use it as a bed as opposed to a thin adhesive layer the little bit of additional flexibility may help cushion the glass from...

Dear Forrest. I'm sorry for this stupid question but this work is important (at least to me)! Using Your Graph for w/wn=0.3 as an example and telling you that the colours for p12 and Theta are similar on my monitor. Is the Lower of the two lines the Reed action and the upper the Pressure drop or is ...

Dear Forrest.
Wonderful stuff.
Is it possible to see the response of the valve (&p12) when the exciting pressure in the box (Psource)is offset in the +ve direction, say about 0.5psi?

Graham.

Dear Forrest. I'm wondering if the Damping Curve is itself a function of a number of variables that can change during the motors start-up process. It wouldn't surprise me at all. Lately I've been modelling (with NUDiS) some short valveless motors. 'Short' as in The total combustion time being a long...

And what a shame that the company responsible for some of the Great "Akira Kurosawa" films should also be responsible for this?

Graham.

Dear Larry.
Thank you so much for this.
I now see Godzilla in a totally new way!
You are a real JOY

Best Regards
Graham.