Search found 1190 matches

by Zippiot
Tue Mar 06, 2012 7:58 pm
Forum: Rocket forum
Topic: Finally back, building PVC Rocket!
Replies: 1
Views: 1678

Finally back, building PVC Rocket!

Been gone a long time, the Military wouldnt let me build nor photograph the cool things Ive done. A bit more settled down now and after a careful reading of my barracks rules and regulations I am finally able to get back to building (only a few things). This time its Rockets! I had a while to perfec...
by Zippiot
Sat Feb 27, 2010 7:15 am
Forum: Jet Vehicles, All Types
Topic: Jet Beetle
Replies: 1
Views: 2156

Jet Beetle

I know its an oldie, but he is my neighbor and I saw the bug the other day. Reminded me to show you all just how far an engineering degree can take you!

http://www.ronpatrickstuff.com/
by Zippiot
Sat Feb 27, 2010 5:38 am
Forum: Rocket forum
Topic: MLRS
Replies: 0
Views: 1755

MLRS

Just took the ASVAB and got a 99th %tile, qualified as MLRS Crewman. Its my 2nd choice after Apache Pilot (seriously) but the more I look the cooler it becomes. For those not familiar here is a short vid showing it in action http://www.youtube.com/watch?v=GJlGZCgPqts&NR=1&feature=fvwp Though I am pr...
by Zippiot
Tue Jan 26, 2010 9:34 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 85287

Re: Calculating top speed on ice...

Im using an Aeromotive Bypass Regulator, Ill take some pics tomorrow but its easier to describe how it works. It was the cheapest bypass regulator which actually works differently from a "normal" fuel regulator. The inlet is actually 4 female threaded holes around a spring loaded cone. The cone seal...
by Zippiot
Fri Jan 22, 2010 9:29 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 85287

Re: Calculating top speed on ice...

Wow missed a day and you already filled out anothr page...
Will you be using that old throttle valve for throttle or regulation? Its exactly like my fuel regulator for my car.
You can get stainless that doesnt work harden, cant remember the grade but its listen on mcmastercarr.
by Zippiot
Wed Jan 13, 2010 5:20 pm
Forum: Valveless pulsejet forum
Topic: Aerospike valveless?
Replies: 6
Views: 2546

Re: Aerospike valveless?

Yeah sorry about the plagerism, just googled valveless pj plans and it took me to an old forum post. Copy-paste etc :(
by Zippiot
Wed Jan 13, 2010 3:50 pm
Forum: Valveless pulsejet forum
Topic: Aerospike valveless?
Replies: 6
Views: 2546

Re: Aerospike valveless?

I was thinking that, but its a very large area inside there would be hard to control fuel once it heated up.
Gotta work on the intake, maybe Ill make the spike ceramic refractory but I dunno if it will stand up to the pressure flux inside the PJ.
So much to do....
by Zippiot
Wed Jan 13, 2010 7:38 am
Forum: Valveless pulsejet forum
Topic: Aerospike valveless?
Replies: 6
Views: 2546

Re: Aerospike valveless?

Guess Ill have to roll some cones and hop on the lathe this weekend :(
by Zippiot
Tue Jan 12, 2010 10:38 pm
Forum: Valveless pulsejet forum
Topic: Aerospike valveless?
Replies: 6
Views: 2546

Aerospike valveless?

If you kept the volume of area and angles the same, think it would run?
My pic was the best I can draw on my cell, and I have given 0 thought towards intake etc.

Image
by Zippiot
Mon Jan 11, 2010 9:12 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 85287

Re: Calculating top speed on ice...

Could hang upside down from the plane?
by Zippiot
Mon Jan 11, 2010 4:17 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 85287

Re: Calculating top speed on ice...

Do it, you are almost there!
Image

you know you wanna
by Zippiot
Sat Jan 09, 2010 5:47 am
Forum: Ramjet forum
Topic: Ducted Ramjet that is meant to fly.
Replies: 35
Views: 25361

Re: Ducted Ramjet that is meant to fly.

Regular epoxy melts but Pheonlic resin is ablative, instead of melting it flakes away as it burns. Cant find it at Tap Plastics but can be ordered from fireworks suppliers
by Zippiot
Wed Dec 30, 2009 7:29 am
Forum: Gas turbine forum
Topic: Italian pre-WW2 jet engine?
Replies: 3
Views: 2493

Re: Italian pre-WW2 jet engine?

Probably the one from the Camproni jet, it wasnt actually very fast and couldnt fly high. Was it Camprini...
by Zippiot
Tue Dec 29, 2009 2:27 am
Forum: Valveless pulsejet forum
Topic: Tighter airvalves?
Replies: 28
Views: 6055

Re: Tighter airvalves?

Naw just get some ablative glue, like phenolic resin. Then maybe itll last 10 or even 15 seconds :P
by Zippiot
Mon Dec 28, 2009 11:18 pm
Forum: Valveless pulsejet forum
Topic: Tighter airvalves?
Replies: 28
Views: 6055

Re: Tighter airvalves?

glue, I vote glue!