Search found 613 matches

by pezman
Sun Oct 28, 2007 9:41 pm
Forum: Off topic forum
Topic: Toys R Us Super Computer
Replies: 4
Views: 2047

Toys R Us Super Computer

I stumbled across a few articles about the Cell processor in the Sony PS3 -- right about when the price dropped to $500 -- so now I own a purported super-computer. At any rate, it wasn't too hard to find the 3.7 gig Yellow Dog Linux download and burn a dvd: tp://ftp.yellowdoglinux.com/pub/yellowdog/...
by pezman
Fri Oct 26, 2007 6:30 pm
Forum: Tools and Construction
Topic: Odd Metal jars
Replies: 554
Views: 1730454

Ready made 22 degree flaming frappus?

The average flame cone angle for my better running jars (4" to 8") are approx. 22 degrees. My next project will be to build a CC matching a flame cone of 22 degrees. As a side note I compared the FWE chamber and found it to be approx. 10 degrees. As an aside-aside, the oil jars that Mark posted loo...
by pezman
Mon Oct 22, 2007 1:01 am
Forum: Tools and Construction
Topic: Odd Metal jars
Replies: 554
Views: 1730454

stainless steel olive oil decanters

I have seen very similar items at Target.

There are usually a lot of other interesting proto-pulse-jet items there as well ...
by pezman
Mon Oct 15, 2007 8:29 pm
Forum: Jet Vehicles, All Types
Topic: Exploding Kayaks
Replies: 11
Views: 4615

You're not the only one El-K

I think that a quick glance at the link that I posted will reveal that you are not alone ...
by pezman
Thu Oct 04, 2007 1:46 pm
Forum: Valveless pulsejet forum
Topic: Radial inlet
Replies: 34
Views: 9286

Annular engines

Well, who says the section of the annular duct has to be the same as in a corresponding tubular duct? No one, as far as I can tell. I think that there is general agreement that you would need to fiddle with the duct dimensions to get them where they need to be. I just proposed "1/4 CC cross section...
by pezman
Thu Oct 04, 2007 1:20 am
Forum: Valveless pulsejet forum
Topic: Radial inlet
Replies: 34
Views: 9286

Radial Inlet

I think that there have been a few coaxial engines that have been made and I'm pretty sure a few of these have actually been successfully operated. One problem with having OD of the inlet "annulus" match that of the combustion chamber is that you are basically maximizing the friction. It might be be...
by pezman
Tue Oct 02, 2007 2:00 am
Forum: Off topic forum
Topic: Open Office sub for MS office
Replies: 1
Views: 1446

OpenOffice

It's all I use at home. I like Excel a little better than Open Office Calc. On the other hand, OO offers a lot more variety in the scripting department. I never use Access, and wouldn't use it even if it were free, so I haven't compared it to OpenOffice "Base", its free alternative. Open Office Writ...
by pezman
Sat Sep 29, 2007 12:26 am
Forum: Gas turbine forum
Topic: NGV's and Turbine wheels...!
Replies: 23
Views: 11800

Deep Thoughts, by Jack Handy

LOFL, love your new tag line! I need a new one. Glad you enjoyed it :lol: Can't remember where I got it though??, not one of mine unfortunately, I'm not that smart! If we can't have a laugh every now and then, we've lost the plot!! Cheers, Smithy. I remember it as one of the "Deep Thoughts, by Jack...
by pezman
Sat Sep 29, 2007 12:19 am
Forum: Off topic forum
Topic: A steam generator with possible over unity
Replies: 32
Views: 13619

the motor itself would be excess to requirements ...

tufty wrote:If it was able to produce more energy that was put in, the motor itself would be excess to requirements, except for starting.
Reminds me of the movie "Primer".
by pezman
Thu Sep 27, 2007 9:09 pm
Forum: Valveless pulsejet forum
Topic: Crossed Flow Intake
Replies: 15
Views: 5710

Experimenting with fluidic circuit ideas

It's pretty easy to make little jigs out of lexan and wood that can be used as 2d flow simulators. Depending on what you are testing, you can sometimes run a simulation using a steady-state flow. In other cases, you might need to simulate a combustion cycle (the jig can probably survive a single-cyc...
by pezman
Thu Sep 27, 2007 9:04 pm
Forum: Valveless pulsejet forum
Topic: Flash Jam Jar built by university
Replies: 2
Views: 1835

Stagnation point combustor

On the other hand, I did some experiments firing a "pop-gun" device into a stagnation chamber and the results are astonishing -- maybe for some of the the same reasons. The combustion in the pipe seems to drive gasses ahead of it, and as they bounce off the back wall of the chamber, the flame front ...
by pezman
Tue Sep 25, 2007 4:26 pm
Forum: Valveless pulsejet forum
Topic: Crossed Flow Intake
Replies: 15
Views: 5710

Wet blankets and all that

Well, I'm a little confused by the introduction of wave issues, since fluidics rely on flux -- and with the size of the intakes on an average pj vs the wavelength, the system is probably best modeled as a time-varying flux, so I'm not sure that I see any domain mismatch here. Granted that whether a ...
by pezman
Fri Sep 21, 2007 4:17 am
Forum: Rocket forum
Topic: High thrust water rocket
Replies: 3
Views: 3265

Water rocket car

Wow, it looked like War of the Worlds!
by pezman
Wed Sep 19, 2007 3:02 am
Forum: Valveless pulsejet forum
Topic: Crossed Flow Intake
Replies: 15
Views: 5710

x-flow

Wow, that might be an absolutely ingenious idea. I think that I remember seeing a patent where they used scavenged air from a jet compressor stage to prevent reverse flow in a valveless pulsed detonation engine. If that idea works well, then maybe the following would work. Suppose that you have two ...