Great bit of work Grim and Forrest.
Is a W shaped valve block in the offing?
Graham.
Search found 571 matches
- Wed Dec 10, 2008 7:47 pm
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
- Mon Dec 08, 2008 8:19 pm
- Forum: How to improve this site
- Topic: Rossco injector
- Replies: 1
- Views: 4522
Rossco injector
Questions about the Rossco injector appear regularly. Perhaps collect all the stuff and make it a sticky under Tools?
Graham.
Graham.
- Mon Dec 08, 2008 7:49 pm
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
Re: dynamic modeling of a strip valve
Hi Forrest.
That impresses the hell out of me. Only one odd harmonic and DC, Hmm.
Is the function reasonably easy to use?
Graham.
That impresses the hell out of me. Only one odd harmonic and DC, Hmm.
Is the function reasonably easy to use?
Graham.
- Mon Dec 08, 2008 2:10 pm
- Forum: Valveless pulsejet forum
- Topic: New guy getting started
- Replies: 53
- Views: 28086
- Sun Dec 07, 2008 9:14 pm
- Forum: Valveless pulsejet forum
- Topic: New guy getting started
- Replies: 53
- Views: 28086
- Sat Dec 06, 2008 5:16 pm
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
Re: dynamic modeling of a strip valve Jerk
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?
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?
- Sat Dec 06, 2008 2:01 am
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
Re: dynamic modeling of a strip valve
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...
- Fri Dec 05, 2008 11:55 am
- Forum: Valveless pulsejet forum
- Topic: See through jet
- Replies: 53
- Views: 26867
Re: See through jet
Casio ExLim. High speed movie recording at up to 1200 fps
http://exilim.casio.com/browse_cameras/ ... lim/EX-F1/
Graham
http://exilim.casio.com/browse_cameras/ ... lim/EX-F1/
Graham
- Fri Dec 05, 2008 8:37 am
- Forum: Valveless pulsejet forum
- Topic: New guy getting started
- Replies: 53
- Views: 28086
Re: New guy getting started
... 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...
- Wed Nov 26, 2008 7:44 pm
- Forum: Valveless pulsejet forum
- Topic: See through jet
- Replies: 53
- Views: 26867
Re: See through jet
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...
- Fri Nov 07, 2008 1:13 am
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
Re: dynamic modeling of a strip valve
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 ...
- Fri Nov 07, 2008 12:19 am
- Forum: Valved pulsejet forum
- Topic: dynamic modeling of a strip valve
- Replies: 144
- Views: 2938365
Re: dynamic modeling of a strip valve
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.
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.
- Thu Nov 06, 2008 4:38 pm
- Forum: Valved pulsejet forum
- Topic: The Cybernetics of a Pulse Combustor
- Replies: 28
- Views: 2830918
Re: The Cybernetics of a Pulse Combustor
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...
- Wed Nov 05, 2008 8:52 pm
- Forum: Off topic forum
- Topic: Death of jetZILLA Predicted
- Replies: 25
- Views: 23039
Re: Death of jetZILLA Predicted
And what a shame that the company responsible for some of the Great "Akira Kurosawa" films should also be responsible for this?
Graham.
Graham.
- Wed Nov 05, 2008 8:15 pm
- Forum: Off topic forum
- Topic: Death of jetZILLA Predicted
- Replies: 25
- Views: 23039
Re: Death of jetZILLA Predicted
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.
Thank you so much for this.
I now see Godzilla in a totally new way!
You are a real JOY
Best Regards
Graham.