I'd like to know how far is UP!
The question is too broad. Think about what you actually want to know and ask again.
Search found 187 matches
- Thu Aug 25, 2011 5:18 pm
- Forum: Gas turbine forum
- Topic: What is the potential thrust of a homemade jet engine?
- Replies: 1
- Views: 5683
- Wed Jul 20, 2011 2:57 pm
- Forum: Gas turbine forum
- Topic: Project Radial Jet from a 105mm Holset
- Replies: 40
- Views: 58737
Re: Project Radial Jet from a 105mm Holset
You could try filling the tubes with Sand...or filling with water and freezing it. I've seen some put a spring around it too. The Sand method has always worked best for me...
- Wed Sep 17, 2008 5:23 pm
- Forum: Rocket forum
- Topic: Mini N2O gas canisters?
- Replies: 16
- Views: 23552
Re: Mini N2O gas canisters?
Then wouldn't it make more sense to inject the fuel under pressure and rely on air as the oxidizer? I doubt that you'd really get much appreciable thrust from what you suggest. How are you going to entrain atmospheric pressure air into a chamber that is running at 68 atmospheres. I've thought at tim...
- Tue Sep 16, 2008 6:21 pm
- Forum: Rocket forum
- Topic: Mini N2O gas canisters?
- Replies: 16
- Views: 23552
Re: Mini N2O gas canisters?
fastnova & Ray - I have a better idea -- but, unfortunately, it doesn't belong on the Rocket Forum (unless you'd want to use it as a low-altitude booster or something). Anyway: Rig the little cannister so that when pierced, it blows into the front end of an eductor, so it will drag in a bunch of ai...
- Mon Sep 15, 2008 10:17 pm
- Forum: Rocket forum
- Topic: Mini N2O gas canisters?
- Replies: 16
- Views: 23552
Re: Mini N2O gas canisters?
Your idea works and is available for purchase.
Seems pretty complex for only 11 N of total impulse.
http://www.aeroconsystems.com/motors/Sc ... reamer.htm
Enjoy
Seems pretty complex for only 11 N of total impulse.
http://www.aeroconsystems.com/motors/Sc ... reamer.htm
Enjoy
- Sat Jun 16, 2007 12:29 am
- Forum: Rocket forum
- Topic: Rcandy recipe, not in grams.
- Replies: 4
- Views: 8323
- Thu Feb 22, 2007 3:25 am
- Forum: Rocket forum
- Topic: Solid fuel questions
- Replies: 60
- Views: 61893
Re: Chamber Volume
Now let me ask a simple question, why does the chamber volume increasing by N number of charges lower thrust? what is the difference between this discrete staged increase in volume and that of a progressive volume increase in a normal fuel grain and chamber? In a normal fuel grain there is an incre...
- Tue Feb 20, 2007 5:55 pm
- Forum: Rocket forum
- Topic: Solid fuel questions
- Replies: 60
- Views: 61893
Re: Solid fuel questions
How much residue is left after combustion is complete (ash) Very little, most of the ash I see in a motor is from the casting tubes and liner...I sometimes find a small amount of Al2O3 on the convergent portion of the nozzle, but that depends on formula and pressure. Combustion is usually very comp...
- Tue Jan 16, 2007 5:52 pm
- Forum: Rocket forum
- Topic: Rocket Engine from XCOR
- Replies: 5
- Views: 8814
- Sun Dec 24, 2006 6:53 pm
- Forum: Rocket forum
- Topic: Is it legal to make sugar rockets in Georgia (US)?
- Replies: 2
- Views: 7492
I'm not a lawyer, so I can't speak the legality of making rocket motors. I do know that KN and Sugar aren't regulated substances... Mixing them together doesn't appear to make them a regulated substance (the ATF is starting down that path, but not there yet). Lots of people in the US make KN/Sugar m...
- Fri Dec 15, 2006 3:40 pm
- Forum: Rocket forum
- Topic: Fast Sugar Propellant
- Replies: 37
- Views: 41365
re: Fast Sugar Propellant
Why not core the grain slightly? Just take an appropriate sized drill bit and drill into the grain some distance. It'll increase burning surface area. You'll notice a shorter burn time, higher internal pressures and a nice smooth burn. Depending on how deep you drill and what size you drill you'll h...
- Thu Dec 14, 2006 4:43 pm
- Forum: Rocket forum
- Topic: APCP propellant formulations
- Replies: 1
- Views: 8138
re: APCP propellant formulations
OH MY. Catocene and Ferrocene are not for amateurs...scary stuff that even the professional motor builders (Aerojet, Thiokol, etc) avoid, except this one. Sub 20 micron AP can go high order. spontaneously...be very careful with the grinding. Use a ball mill with non sparking media. Treat the AP as a...
- Fri Dec 08, 2006 1:16 am
- Forum: Rocket forum
- Topic: Physics xtra credit project: Build two 1-time-use candyrocks
- Replies: 29
- Views: 32081
Re: re: Physics xtra credit project: Build two 1-time-use ca
I am sure they are trying to please everyone while keeping us safe. Must be a hard job... Anyone know the nubmer of deaths or injuries caused by rockets per year, just wondering. Thats the point, they are claiming to try to keep us safe...they aren't doing it. Only a total moron of a terrorist woul...
- Fri Dec 08, 2006 12:07 am
- Forum: Rocket forum
- Topic: Physics xtra credit project: Build two 1-time-use candyrocks
- Replies: 29
- Views: 32081
re: Physics xtra credit project: Build two 1-time-use candyr
it won't explode...it will overpressurize the case and go out. Overpressurization and explosion are very, very different things. Explosion is a very specific term...not to the ATF but to anyone that works in the field. It is something that has a supersonic burn rate...ie it burns at over 1100fps (ap...
- Thu Dec 07, 2006 9:41 pm
- Forum: Rocket forum
- Topic: Physics xtra credit project: Build two 1-time-use candyrocks
- Replies: 29
- Views: 32081
Re: re: Physics xtra credit project: Build two 1-time-use ca
If you ask the ATF they will tell you that APCP, ANCP and KNCP based rocket motors are under their regulations. BP motors that contain more than 62.5g of propellant would be under this rule as well. While they will tell you that these are regulated, their own regulations don't support that. APCP is...