Search found 10734 matches

by Mark
Fri Oct 17, 2003 11:33 pm
Forum: Valveless pulsejet forum
Topic: Adjustable Jam Jar
Replies: 10
Views: 6136

Re: From howling to thrust

Mark - I also think you could do something like this, not with a true howler tube, but with a simple 'jam jar' type device like John's, but with one addition: a Logan-style tube with external fuel supply and 'choke plate' at the outside end. Imagine John's device [but with the stack solidly attache...
by Mark
Fri Oct 17, 2003 1:22 pm
Forum: Valveless pulsejet forum
Topic: Adjustable Jam Jar
Replies: 10
Views: 6136

Re: From howling to thrust

Mark, An interesting idea, but I don't think the Rijke tube is likely to turn into an engine and produce thrust. Unlike a pulsejet, it only shakes the gas column. There's nothing to push a gob of hot gas in a particular direction. In fact, the tube needs to be vertical, so that actual movement is i...
by Mark
Thu Oct 16, 2003 6:31 pm
Forum: Valveless pulsejet forum
Topic: Adjustable Jam Jar
Replies: 10
Views: 6136

Transitions

That was an interesting flame du jour there. I was toying around with a thought of using a catalyst such as the high surface area hex ceramic car catalytic converter material found in exhaust pipes. They are made up of many little tubes of platinum, paladium, or other active element coating mixtures...
by Mark
Thu Oct 16, 2003 12:48 pm
Forum: Valved pulsejet forum
Topic: More about my pulsejet
Replies: 1
Views: 2500

Re: More about my pulsejet

Good, my pulsejet is carbureted, I use normal gasoline!!!! . I modified a Dyna jet engine and my suply line is not grater then 3mm in diameter, my pulse jet starts to run but than it stops ( it run not more then 1 second, I feel it whants to go away, but!!!!),i thing there is problem whit thi carbu...
by Mark
Wed Oct 15, 2003 12:57 am
Forum: Tools and Construction
Topic: Walls
Replies: 2
Views: 1915

The black bar and a personal aside

I've had sugar-free immitation mango fruit beverage from mexico recently that used guar gum. I wouldn't call it pleasant--soon after mixing it became thick and slimy. Thixotropic, in case you didn't know, is the interesting property of a material that liquefies under shock. If you take clay and slo...
by Mark
Tue Oct 14, 2003 10:30 pm
Forum: Valved pulsejet forum
Topic: Clam baker
Replies: 18
Views: 10371

entrepreneurism

Pieter van Boven wrote:Is this a picture of the engine we are talking about?
Imagine the sound...

Pieter.
Might suffice as a lifting object to supply tundra people their supply. ha
by Mark
Tue Oct 14, 2003 12:52 pm
Forum: Valveless pulsejet forum
Topic: Proposed Design - 'Reflector Bucket' Valveless Pulsejet
Replies: 19
Views: 10927

Re: Never Hopeless

>Larry, I think this is a hopeless task. If you intend to use the rebound of compressed gas from the 'bucket', this bucket will have to be very long to accommodate all the gas spewed out of the engine intake, and to start spewing it back only after the 'normal' intake is over. If the compressed gas...
by Mark
Mon Oct 13, 2003 1:17 pm
Forum: Tools and Construction
Topic: Walls
Replies: 2
Views: 1915

Walls

After Al's topic about the silicate/steel high-temperature compound, my sister mentioned some kind of new home construction material that is somewhat see-through and used to make walls for houses. I have no idea what it is made from, but it started me wondering, if a water-glass/fiberglass based mat...
by Mark
Sat Oct 11, 2003 10:31 pm
Forum: Valved pulsejet forum
Topic: Clam baker
Replies: 18
Views: 10371

Clam baker

There is a pulsejet you can look at for sale on eBay. Just type the word "pulsejet". I think it might be a Katydid, or about the same size. It's all of 30 pounds and produces 110 lb static thrust. Ok, all you terrorists, buy it now.
Mark