Search found 421 matches

by ace_fedde
Fri Sep 09, 2011 4:58 pm
Forum: Valveless pulsejet forum
Topic: DIY high temperature composite pulse jets
Replies: 17
Views: 10493

Re: DIY high temperature composite pulse jets

ace_fedde wrote:Have to find some very heat resistent coating against oxidation, carbondioxide doesn't work that well as construction material :lol:
Fedde
Took one fiber out of a sheet of carbon fiber and tried to light it. It didn't burn, melt or oxidize! :shock:

Fedde
by ace_fedde
Fri Sep 09, 2011 11:53 am
Forum: Valveless pulsejet forum
Topic: DIY high temperature composite pulse jets
Replies: 17
Views: 10493

Re: DIY high temperature composite pulse jets

Unfortunatly water glass, that is so easy to use, melts already at 1088 C. Not really usable for PJ construction. I would like to experiment with charcoal as construction material. It has a melting temperature of above 3000 C. I have a pottery oven that easely reaches the temperatures needed for car...
by ace_fedde
Fri Sep 09, 2011 9:42 am
Forum: Valveless pulsejet forum
Topic: DIY high temperature composite pulse jets
Replies: 17
Views: 10493

Re: DIY high temperature composite pulse jets

"Water glass is a useful binder of solids, such as vermiculite and perlite. When blended with the aforementioned lightweight aggregates, water glass can be used to make hard, high-temperature insulation boards used for refractories, passive fire protection and high temperature insulations, such as ...
by ace_fedde
Thu Sep 08, 2011 8:10 pm
Forum: Valveless pulsejet forum
Topic: unknown valveless p-j
Replies: 3
Views: 1683

Re: unknown valveless p-j

Hi Jerry,

It would be a bit easier if you post a photo.

Fedde
by ace_fedde
Wed Sep 07, 2011 8:43 pm
Forum: Valveless pulsejet forum
Topic: mark I am not worthy
Replies: 4
Views: 1830

Re: mark I am not worthy

already reported it.

Looks Mike is pretty busy, reported lots of them but they are still here.

Metiz for moderator? Vote all for Metiz 8)

Fedde
by ace_fedde
Fri Sep 02, 2011 9:08 pm
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 715945

Re: More free plans: 40 pound Chinese

I didn't see much if any debri entering the engine, it would almost pause before being pulled into the main exhausting stream. We were already planning to put a thin tube on a smoke generator and use it like they do with cars in a windtunnel, and of course film it at 1000fps. Probably it would give...
by ace_fedde
Fri Aug 26, 2011 7:26 pm
Forum: Valveless pulsejet forum
Topic: Susan Engel Joins Portero, Inc. As CEO
Replies: 2
Views: 1547

Re: Susan Engel Joins Portero, Inc. As CEO

Danny,

Can't figure out what you're trying to sell, spam? :lol:

Would like to meet Susan Engel, after all, she is a CEO!!

Fedde
by ace_fedde
Fri Aug 26, 2011 7:24 pm
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 374
Views: 1757074

Re: Please put your "I am new and need help" question here.

Michieltje,
MichielWolthaus wrote:I'm sorry, i'm from Holland :wink:
Dont't be sorry :evil:

Search the forum for "thrust", "formula", etc. You will find your answer and you'll learn a lot more!!

Fedde
by ace_fedde
Fri Aug 26, 2011 7:19 pm
Forum: Valveless pulsejet forum
Topic: Please put your "I am new and need help" question here.
Replies: 374
Views: 1757074

Re: "I am new and need help"

cosmo,
cosmogod wrote:And am ready to face a steeper learning curve. :D
Do so. Just start building something simple (from this forum)and start with a simple fuel (propane/butane), that will be your steeper learning curve. Dig the forum :D

Fedde
by ace_fedde
Mon Aug 15, 2011 8:40 am
Forum: Ramjet forum
Topic: Steve's ramjet revisited
Replies: 30
Views: 11086

Re: Steve's ramjet revisited

metiz wrote:Fedde, has your situation cleared up to the point you can do "fun stuff" again?
:( :( Not really
by ace_fedde
Sun Aug 14, 2011 9:35 pm
Forum: Ramjet forum
Topic: Steve's ramjet revisited
Replies: 30
Views: 11086

Re: Steve's ramjet revisited

I've read it about halfway through, but it's too complex for me to make any sense of. Don’t try to understand the whole paper, just look at fig. 2, 5 and 7. Fig. 2 names the different sizes of a choked ejector, fig. 5 and 7 show the effects of different ratio’s between the sizes. That’s all you hav...
by ace_fedde
Sun Aug 14, 2011 12:23 pm
Forum: Ramjet forum
Topic: Steve's ramjet revisited
Replies: 30
Views: 11086

Re: Steve's ramjet revisited

but that also means that the air speed is reduced significantly. The orifice on the ramjet will also have to be a lot bigger. Ha! think so? read this paper: Performance of choked unsteady ejector nozzles Miller.pdf Looks you can even make a oscilating augmentor (ejector), which is of course the opp...
by ace_fedde
Sun Aug 14, 2011 9:46 am
Forum: Ramjet forum
Topic: Steve's ramjet revisited
Replies: 30
Views: 11086

Re: Steve's ramjet revisited

Metiz,

Think about this set up:
PJ - augmentor - ramjet
The augmentor will produce a cooler, oxygen-richer and more constant flow to feed the ramjet.

Fedde
by ace_fedde
Tue Jun 21, 2011 9:06 pm
Forum: Valveless pulsejet forum
Topic: Kraken
Replies: 44
Views: 12148

Re: Kraken

Been away for a while and see what happens :shock: WOW!