Search found 20 matches

by haaken
Thu May 13, 2004 3:17 pm
Forum: Valved pulsejet forum
Topic: Pulsed Outboard Motor?
Replies: 42
Views: 20815

Mark wrote:That was a nice find Haaken, are there any more pages that you have on that water pulsejet, some written discriptions of characteristics?
Thanks,
Mark
No, but its an part of the A.R.J pulse jet dravings/plans .

Does anyone seen something similar that was produced?
by haaken
Tue May 11, 2004 6:41 pm
Forum: Valved pulsejet forum
Topic: Neoprene coated valve seats
Replies: 1
Views: 1883

Neoprene coated valve seats

I have just read a document by Bureau of Aeronatics, they coated a the valve grid/seats on a 22 inch pulsejet. They extended the valve life to 164 minutes of operating time! Surely beats 30 minutes! The valve grid vas coated with neoprene by the means of a process developed by the B. F. Goodridge co...
by haaken
Tue May 11, 2004 12:35 pm
Forum: Valved pulsejet forum
Topic: Pulsed Outboard Motor?
Replies: 42
Views: 20815

Re: Pulsed Outboard Motor?

Moving water is FAR more effective then moving air right, therefore I propose that if one was to put the exhaust underwater it would create a seriously powerful outboard motor. By pushing against water there will be far more pressure in the chamber, so you would need strong valves (slow), but this ...
by haaken
Tue May 11, 2004 9:45 am
Forum: Valveless pulsejet forum
Topic: valveless construction dravings
Replies: 1
Views: 1917

valveless construction dravings

Doe anyone her got the drawings on a valveless that is easy and cheap too build?

The cost of stainless vent up 20% here in Norway
by haaken
Tue May 11, 2004 9:37 am
Forum: Valved pulsejet forum
Topic: My 35 kg trust pulsejet
Replies: 1
Views: 2094

My 35 kg trust pulsejet

Tryed too start my pulsejet too day, but i did get nothing but big flames coming out of the tailpipe and on occasions some dull bangs. I suspect the compressor i was using did not deliver enough air pressure and volume. I altso did have big problems with the spark plug, due to a missing capacitator ...
by haaken
Sun May 09, 2004 12:29 am
Forum: Valved pulsejet forum
Topic: My 35 kg trust pulsejet
Replies: 6
Views: 3513

Tryed too start my pulsejet too day, but i did get nothing but big flames coming out of the tailpipe and on occasions some dull bangs.


Any suggestions?
by haaken
Sun May 02, 2004 5:46 pm
Forum: Valved pulsejet forum
Topic: TIG welded stainless steel pulse jet
Replies: 1
Views: 1957

No, i dont think stain less steel inflicts the resonance too mutch since this material holds up to heat quite well. Just be avare that stainless steel can be hard to roll due to the stiffness. If you are going to build a large one, play safe and use at least 2mm thick steel plates. A pulsejet that c...
by haaken
Sun May 02, 2004 5:36 pm
Forum: Valved pulsejet forum
Topic: My 35 kg trust pulsejet
Replies: 6
Views: 3513

Mike Everman wrote:Hi, Haaken.
Heck yes, we all want to see whatever you've got!
Ok, here are some pictures.
Enjoy!
by haaken
Sat May 01, 2004 8:23 pm
Forum: Valved pulsejet forum
Topic: My 35 kg trust pulsejet
Replies: 6
Views: 3513

My 35 kg trust pulsejet

My 35 kg trust pulsejet is very soon ready for test start.
The only remaining things are to veld the fuel injector in place, and fabricate a high voltage source.

The first test run will be on propane, and diesel will follow.
If anyone are interested i can post pictures

Haaken
Norway
by haaken
Sun Apr 11, 2004 1:49 pm
Forum: Tools and Construction
Topic: heat insulation
Replies: 11
Views: 5452

heat insulation

I am wondering if it is possible to coat the inside of a pulsejet with some kind of heat reflektive material. On large pulsejets this can possebly increase power output .

It will altso make it a lot safer to operate , because the themperature of the surface will be cooler.
by haaken
Fri Apr 02, 2004 9:16 am
Forum: Tools and Construction
Topic: injectors
Replies: 6
Views: 2981

Re: injetcors

I dont think i need to use a pump, i will just keep the fuel tanks bottom higher than the injectors, an gravity vill do the rest. Haaken, You wish to inject fuel into an occilating column of expanding and contracting gases. Gravity alone will not provide the pressure necessary to feed the fuel unle...
by haaken
Thu Apr 01, 2004 9:01 am
Forum: Tools and Construction
Topic: injectors
Replies: 6
Views: 2981

injetcors

Haaken, In a previous post about your design you told us that the combustion-chamber diameter will be 185mm. This is big but I don't think you need more than 1 fuel-injector if you use injected fuel. This would also be an advantage because you could make the injector a part of the valve grid and th...
by haaken
Wed Mar 31, 2004 1:59 pm
Forum: Tools and Construction
Topic: injectors
Replies: 6
Views: 2981

injectors

Does anyone have experience using stainless steel tube "Rails" inside the combustion chamber on a pulsejet? I am planning to use it to inject liquid fuel. I suspect the tubes will get hot enough to waporise almoust any type of fuel, but im worried that they may melt due to the extreme heat. They may...
by haaken
Thu Mar 18, 2004 10:13 pm
Forum: Valved pulsejet forum
Topic: my first pulsjet
Replies: 1
Views: 2445

my first pulsjet

Hi, im building my first pulsjet. I have calculated dimentions for 78 lbs ( 35 kg metric ) of thrust. Here is the dimentions: Exhaust pipe diameter : 5 Inch Exhaust pipe lenght : 34.11 Combustion chamber lenght :11.34 Exhaust cone lenght :11.34 combustion chamber diameter 7.28 I am going to use argu...
by haaken
Wed Mar 17, 2004 11:31 am
Forum: Tools and Construction
Topic: Mark, prepare to be jealous!
Replies: 8
Views: 3785

Re: Mark, prepare to be jealous!

It kinda looks like a fuel tank for a V1 !