Search found 163 matches

by ed knesl
Fri Sep 02, 2005 12:53 am
Forum: Valveless pulsejet forum
Topic: Annular Engine Running
Replies: 13
Views: 5537

Re: re: Annular Engine Running

When done, email me the text file. If you have pics to email, use jpegs and try to keep them down to about 400x500 or 500x400 pixel size and only send a couple at a time (per email message is what I mean). I can't really do higher resolutions justice on a web page, anyway. L Cottrill Larry, If I wr...
by ed knesl
Thu Sep 01, 2005 9:27 pm
Forum: Valveless pulsejet forum
Topic: Annular Engine Running
Replies: 13
Views: 5537

Re: re: Annular Engine Running

Ed - Congratulations, sir! Very nice job proving that it really can be done. I am not surprised that it's a touchy beggar - it's such a simple concept that if it was easy, there'd be some plans out there that you could just follow and everyone would be doing it. Nice work! Please consider writing a...
by ed knesl
Thu Sep 01, 2005 9:24 pm
Forum: Valveless pulsejet forum
Topic: Annular Engine Running
Replies: 13
Views: 5537

Re: re: Annular Engine Running

I wonder if the sleeve concept is fussy from the way the air flow is allowed to enter the engine? That is, I can see it having an opportunity to chase in around the sleeve erratically, whereas with a snorkel type intake duct or ducts, the air is forced to be coherent or more timed in its arrival. M...
by ed knesl
Wed Aug 31, 2005 6:04 pm
Forum: Valveless pulsejet forum
Topic: Annular Engine Running
Replies: 13
Views: 5537

Annular Engine Running

Finaly !! Engine on enclosed image finaly runs. It is very, very difficult thing to get going. Any mathematical and theoretical stipulations did not materialized. After few different "heads" fitted, I came up with just slightly oversized CC/Intake ( head ), than I started inserting additional restri...
by ed knesl
Wed Aug 31, 2005 4:27 am
Forum: Valveless pulsejet forum
Topic: Bruno's "Valveless Pulsejets" discussion (split)
Replies: 18
Views: 6345

Re: Valveless Pulsejets 1.5 -- the latest version

Bruno Ogorelec wrote: Hope you like it.
Bruno, YOU BET !

We all thank you for putting such paper together and keeping it up
to date. A great work !
I have read right through without any brake. It is easy to read despite
many many technical informations and details. Super !

Ed
by ed knesl
Wed Aug 31, 2005 12:36 am
Forum: Valveless pulsejet forum
Topic: October PJ Meet
Replies: 6
Views: 2436

re: October PJ Meet

Ooo, that is too bad everybody is busy. October is the nicest part of the year, stable weather with Indian summer. If anybody changes his mind, let me know, otherwise we must wait till May 06. :( Erik, you have to make it this time ! BTW, anybody knows what happened to Nanosoft - Mikhail Jones ? Don...
by ed knesl
Mon Aug 29, 2005 4:39 am
Forum: Gas turbine forum
Topic: 160,000rpm
Replies: 25
Views: 16525

Re: re: 160,000rpm

Nice piece of work, Horace! Bruno, you may find it interesting that model two stroke engines of only few cm^3 volume are running up to 35,000 rpm easily. E.g. my tuned 3.5 cm^3 engine is optimized for about 29,000 rpm. Marten, what have you done to that engine to get 29 K ? Stock would go around 15...
by ed knesl
Mon Aug 29, 2005 3:37 am
Forum: Valveless pulsejet forum
Topic: October PJ Meet
Replies: 6
Views: 2436

October PJ Meet

Fellow PJ Freaks,

Anybody interested in meeting somewhere in the West in late October
to run and seriously test some engines ?

Mike Everman and Bill Hinote expressed some interest a while ago.
I would be ready for it !

Ed
by ed knesl
Thu Aug 25, 2005 3:16 am
Forum: Off topic forum
Topic: Illiterates to Mars
Replies: 24
Views: 10879

Re: re: Illiterates to Mars

Well, at least everybody who speaks English is using the same letters now. Imagine the confusion when printers stopped using that 'f' without the crossbar and started using the letter 's'. Orthography is important, but it should be mentioned that many of the greatest men in Canadian history had ter...
by ed knesl
Fri Aug 19, 2005 5:25 am
Forum: Valveless pulsejet forum
Topic: Annular PJ issues
Replies: 7
Views: 2540

Re: re: Annular PJ issues

Also, look at any turbojet and fanjet -- they are all annular, with flow ducted around the thick core. Ooo, Bruno, they have turbocompressors or turbofans, totaly different thing ! Well, build one, test it, run it, draw the plans and we all follow your ideas... I have built one, tested it, runs on ...
by ed knesl
Thu Aug 18, 2005 6:38 pm
Forum: Off topic forum
Topic: Illiterates to Mars
Replies: 24
Views: 10879

re: Illiterates to Mars

Bruno, There is a reason for all that !! Dumbing down the masses always work well for power elite. It is hard to control smart and educated people. Do you remember from history at Old Rome they gave to the plebs "Bread and Games". It worked well for quite long time, then the empire collapsed from al...
by ed knesl
Thu Aug 18, 2005 6:17 pm
Forum: Valveless pulsejet forum
Topic: Tharratt Pulsejet
Replies: 26
Views: 12038

re: Tharratt Pulsejet

Hagent, This thing is a bear, very hard to tune up. As Bill H. suggested the boudary layer is a serious problem and I can testify to that. Mine was running just fine with little of forced air, I was close but for pure luck than any method behind it. When I changed coulple of things, the beast quit a...
by ed knesl
Thu Aug 18, 2005 1:16 am
Forum: Valveless pulsejet forum
Topic: Annular PJ issues
Replies: 7
Views: 2540

re: Annular PJ issues

Ooo, Bill, This is great ! Yes, simply too much surface area to deal with and losses resulting from that. The question is why to do that ? I was going to write some similar analysis comming to conclusion, that it doesn't pay off reinventing the wheel. A single pipe is the most efficient means of del...
by ed knesl
Wed Aug 17, 2005 2:08 am
Forum: Valveless pulsejet forum
Topic: Tharratt Pulsejet
Replies: 26
Views: 12038

Re: re: Tharratt Pulsejet

Ed: Another note: The intake flare will look too wide on your engine, when it's done correctly. The intake angle is formed by the concentric tube on the inside, and the flare on the outside--so all the flare angle has to be put into the flare itself. Just think of the correct angle for the flare as...
by ed knesl
Tue Aug 16, 2005 7:35 pm
Forum: Rocket forum
Topic: Calculate thrust required for a given altitude
Replies: 10
Views: 6036

re: Calculate thrust required for a given altitude

Marten, Unfortunately, things are lot more complicated. Fuel used, plays a big role, also type of fuel grains. Burning gas pressure in CC affects the thrust and burn time. Pressure depends on mass flow and nozzle diameter and exit cone angle and length. There are some Excel based programs for motor ...