Search found 539 matches

by Hank
Fri Nov 11, 2005 6:46 am
Forum: Valveless pulsejet forum
Topic: help?
Replies: 2
Views: 1881

re: help?

Hello- I used to live in Union Co.

Look at some of the plans available on this site for a sense of the size of parts.

Hank
by Hank
Thu Nov 10, 2005 10:08 pm
Forum: Off topic forum
Topic: Chaos and Creation
Replies: 4
Views: 1704

Chaos and Creation

Hello- I've spent a lot of time over the past twenty years or so listening to music of the 60's and 70's that I did not hear the first time around because the musical sphere was eclipsed by the Beatles. Still, they did provide the soundtrack for the period. This in the news regarding one of the two ...
by Hank
Wed Nov 09, 2005 10:37 pm
Forum: Off topic forum
Topic: Internet Evolution
Replies: 1
Views: 1106

Internet Evolution

Hello- I've currently run into one of the tenets of evolution. That is that all living things must die. Some of the websites (History) that I inhabit besides this one are currently owned by dead people. The sites must be operated by some sort of trust and are not maintained. Junk posts abound with s...
by Hank
Wed Nov 09, 2005 10:28 pm
Forum: Tools and Construction
Topic: Uflow usable for pulsejets?
Replies: 16
Views: 13823

re: Uflow usable for pulsejets?

Hello- The Manual that downloads with Uflow is in Spanish. The Help file is in good English, with enough info to operate the program.

Thanks for this one.

Hank
by Hank
Wed Nov 09, 2005 10:06 pm
Forum: Valved pulsejet forum
Topic: New guy needs alot of help!
Replies: 14
Views: 6829

re: New guy needs alot of help!

Hello-Tell your computer to go to the NACA Technical Report server and print out the following two documents: NACA TM-1131 This oldy but goodie is a reprint of a German document published in 1943. Heavy on the math with some good graphics of operating parameters. I don't know if the following is net...
by Hank
Wed Nov 09, 2005 8:56 am
Forum: Valved pulsejet forum
Topic: Limit cycle behavior realized
Replies: 15
Views: 8122

re: Limit cycle behavior realized

The ocilloscope photos, I believe, were of British tests of the Argus duct. Black and white and grainy. Their posting predates the fractal posts.
Their presence is valuable in a visualization of the system in operation.
Hank
by Hank
Wed Nov 09, 2005 5:35 am
Forum: Valved pulsejet forum
Topic: Limit cycle behavior realized
Replies: 15
Views: 8122

Re: Limit cycle behavior realized

[quote="WebPilot"]My previous work on a system dynamic model of a pulse combustor (earlier this year) stalled, in that no matter how I tried, the simulation either blew up or decayed to 0,0 in the phase portrait. --Why would it not return to 0,0? If one considers this point as O pressure then it wou...
by Hank
Sat Nov 05, 2005 2:32 am
Forum: Valveless pulsejet forum
Topic: Increase net thrust?
Replies: 32
Views: 14419

re: Increase net thrust?

and this......
by Hank
Sat Nov 05, 2005 2:30 am
Forum: Valveless pulsejet forum
Topic: Increase net thrust?
Replies: 32
Views: 14419

re: Increase net thrust?

Hell, Cheat- If that one threw you get a load of this.

Hank
by Hank
Fri Nov 04, 2005 9:42 pm
Forum: Valved pulsejet forum
Topic: Valve life
Replies: 82
Views: 37645

re: Valve life

Hello- Thrust augmentaion by the use of water injection might successfully increase the mass flow if admitted into an augmentor (ejector). You would not be affecting the primary driver, though more space betweem the driver and the augmentor might be called for due to the increase in vacuum the incre...
by Hank
Fri Nov 04, 2005 8:48 pm
Forum: Valveless pulsejet forum
Topic: Increase net thrust?
Replies: 32
Views: 14419

re: Increase net thrust?

Hello- Forrest , long dead Nazarines have nothing to do with it. We are on our own. There was mention in one of the above posts that thrust is in one direction and the drawings in others show flow in one direction. Please see the attached drawing, made by me when I was working on how a pulsed combus...
by Hank
Fri Nov 04, 2005 3:53 am
Forum: Valved pulsejet forum
Topic: My engine is ready to move my plane!
Replies: 18
Views: 10404

re: My engine is ready to move my plane!

Your link does not connect to anything.
by Hank
Thu Nov 03, 2005 8:21 pm
Forum: Valved pulsejet forum
Topic: Valve life
Replies: 82
Views: 37645

re: Valve life

Hello- Check the photograph in the Helmond engine post in this forum. The fuel inlet design ensures that the air that operates the valve assembly is not fuel rich which lowers the heat the valve assembly is subjected to.
Hank
by Hank
Tue Nov 01, 2005 9:11 pm
Forum: Valved pulsejet forum
Topic: My engine is ready to move my plane!
Replies: 18
Views: 10404

re: My engine is ready to move my plane!

Hello- Nice fabrication and machining. The diffuser looks to be a tad long.
Please post a picture of it running and after the first run.
Yes, what airframe to you plan to power?

Hank
by Hank
Tue Nov 01, 2005 8:08 pm
Forum: Valved pulsejet forum
Topic: Helmond pulsejet
Replies: 5
Views: 3909

re: Helmond pulsejet

Hello- I see three advantages to the fuel inlet placement used in the Helmond engine. One is the fuel placement will be close to where the burn starts in a tuned, valved duct. That is 1/7 the duct, or near where the diffuser section meets the combustion chamber. The internal vacuum of these engines ...