Search found 111 matches
- Wed Apr 13, 2005 6:51 pm
- Forum: Valveless pulsejet forum
- Topic: Using UFLOW to model Reynst-ish engines
- Replies: 13
- Views: 10647
re: Using UFLOW to model Reynst-ish engines
Thanks for your comments RG, I don't want to re-invent the turbo jet and I think moving parts are best avoided but I do try to mentally explore every possible avenue. I dont think it would be practical to exchange expansion energy for compression as in a turbo jet but the rotating vanes might provid...
- Sat Apr 09, 2005 6:22 pm
- Forum: Valveless pulsejet forum
- Topic: Using UFLOW to model Reynst-ish engines
- Replies: 13
- Views: 10647
Re: re: Using UFLOW to model Reynst-ish engines
jmhdx- Yeah, I was kinda thinking about something like that myself. Mark posted a website on Eric,s thread about supersonic shock waves emitted by one of his engines. This site belongs to a researcher exploring toroidal vortices, and he displays some amazing video. Have you seen it? He has found a ...
- Fri Apr 08, 2005 4:08 pm
- Forum: Valveless pulsejet forum
- Topic: Using UFLOW to model Reynst-ish engines
- Replies: 13
- Views: 10647
re: Using UFLOW to model Reynst-ish engines
My instincts tell me the seperation of the two chambers would be unecessary. Otherwise that should work. I sketched up a barrel shaped chamber and immediately wondered if it could spin and that led me down a whole new path. Once running as drawn ever increasing a small hole between the two chambers ...
- Sun Mar 20, 2005 3:53 pm
- Forum: Off topic forum
- Topic: Pulsejet vs Turbine
- Replies: 14
- Views: 11836
re: Pulsejet vs Turbine
Hi Jetset, did you see the Scrapheap Challenge episode where both ideas were tried? Bruce Simpson built a lockwood the other team a turbo jet, the lockwood valveless won becuase there were no parts to fail, it's almost a hollow tube. I think the speeds were in the 40-50mph range. I live within earsh...
- Mon Jan 24, 2005 8:51 pm
- Forum: Valveless pulsejet forum
- Topic: Intake into exhaust tube instead of CC
- Replies: 9
- Views: 9646
Re: Intake into exhaust tube instead of CC
Hi Adam, good to see some fresh ideas on the forum. I thought I'd take the liberty of posting this design again as it has some possibilities. The radial tubes were intended as gas springs, to return some of the blast to aid compression as this design I hope would suck little back up the augmented ex...
- Thu Jan 13, 2005 10:09 pm
- Forum: Valveless pulsejet forum
- Topic: Proposed CC design
- Replies: 48
- Views: 36971
Re: Proposed CC design
Hi Adam, with regard to the picture posted by Bill(Hinote) I think I see your point. If a flash of light originated in the spherical end of the bell, the walls were mirrored and the intake and exhaust were of equal exit area indeed more light would escape through the exhaust. I believe it would "foc...
- Sat Jan 08, 2005 5:02 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's question to K-PT engine series fuel injector types
- Replies: 2
- Views: 3869
Re: Mike's question to K-PT engine series fuel injector type
Thanks for the detailed reply, I think you might have stumbled upon a cheap, simple albeit crude way of preheating a good volume of gas. Can you lean the motor out well?
- Thu Jan 06, 2005 10:05 pm
- Forum: Valveless pulsejet forum
- Topic: FWE Theory - Focused Wave or NOT Focused Wave?
- Replies: 92
- Views: 67307
Re: FWE Theory - Focused Wave or NOT Focused Wave?
(3) To the augmenter assimilation distance discussion: Look at the video. As you can see the shut-off point of the engine is reached at a relatively long distance between the intake/induction pipe mouth and the cone (which is used as an augmenter) mouth. Also notice the engines changes in sound. OK...
- Wed Jan 05, 2005 11:29 pm
- Forum: Off topic forum
- Topic: Venturi Poem help, anyhting is taking
- Replies: 6
- Views: 6503
Re: Venturi Poem help, anyhting is taking
Poor spelling really gives the game away!!
Oh and less is more; more, less is. Think Yoda.
Oh and less is more; more, less is. Think Yoda.
- Wed Jan 05, 2005 11:23 pm
- Forum: Off topic forum
- Topic: Venturi Poem help, anyhting is taking
- Replies: 6
- Views: 6503
- Wed Jan 05, 2005 11:09 pm
- Forum: Valveless pulsejet forum
- Topic: metal jam jar experiments
- Replies: 458
- Views: 341360
Re: metal jam jar experiments
Hmmmm is right! I see no hmmmmms there. A Chinese is (veeery broadly speaking) a 2-dimensional kind of Reynst. Its intake is a single conduit on one side, rather than an annular slit. So, let's reduce the Reynst to two dimensions. Look at a longitudinal half-section of a Reynst pot. I have added a ...
- Tue Dec 21, 2004 9:57 pm
- Forum: Valveless pulsejet forum
- Topic: My Kart
- Replies: 6
- Views: 6637
Re: My Kart
Your engines geometry looks a little under optimized. The combustion chamber seems large for the exhaust and intake pipe diameters, shortening it by a couple of inches might help.
This is possibly the most optimised lockwood, try to copy it's geometry.
[img]C:\My%20Documents\pulse\bg37.jpg[/img]
This is possibly the most optimised lockwood, try to copy it's geometry.
[img]C:\My%20Documents\pulse\bg37.jpg[/img]
- Tue Dec 21, 2004 9:16 pm
- Forum: Valveless pulsejet forum
- Topic: Valveless for R/C Flying?
- Replies: 13
- Views: 10945
Re: Valveless for R/C Flying?
I was thinking the same thing, you could do a surgical tubing inflated like what's his name in Oregon, and that could be your fuel pump, a collapsing tank of rubber. Then too you could make a feedback mechanism that ran off the heat of the engine to pressurize the fuel line with valving to control ...
- Mon Dec 06, 2004 10:16 pm
- Forum: Valveless pulsejet forum
- Topic: FWE engine for valveless testing and valveless pulsejet calc
- Replies: 45
- Views: 34056
Re: FWE engine for valveless testing and valveless pulsejet
Excellent work on the closed end approach, I think it's about nailed the chinese priciple, It's down to where you put the gap in the tube. For a closed end length of pipe there is a mean harmonic when running at L/? the Logan point. I thank Larry for his explanation of this some time ago. I would re...
- Tue Oct 12, 2004 7:22 pm
- Forum: Valveless pulsejet forum
- Topic: M1E Preview
- Replies: 49
- Views: 39231
Re: M1E Preview
Hi jmhdx, For an online calculator, go to http://hyperphysics.phy-astr.gsu.edu/hbase/sound/souspe.html Al Belli Thanks Al!. The difference is large indeed although I appreciate its not a straightforward application of the math to calculate the effect on pulse combustion. I think we can conclude tho...