I plan on putting a home made rocket on a bicycle or sled. I'll use kerosene and nitrous oxide for fuel, but I don't know how to build the nozzle for the escaping gases........help? I'm hoping for speeds in excess of 300 mph.
2006-12-19 05:37:43 · 6 answers · asked by john S 1 in Science & Mathematics ➔ Engineering
That sounds like a really good way to get killed (if you plan on riding the sled/bicycle) or to get someone else killed (if you don't ride it).
There are a number of high-power rocketry groups on the web, and I would strongly reccomend that you contact them first. This will do two things for you -- forst of all it will put you in touch with people who know exactly how to build the nozzle you need, and secondly it will get you some experience working with rocket motors. Experience is what will keep you from killing yourself or someone else with a rocket -- they are VERY tricky little devices and have a nasty habit of exploding.
PS -- I would suggest you use parafin wax with binders instead of kerosene. This is called a Hybrid Rocket Motor (because the fuel is solid but the oxidiser is liquid) and it retains the throtlability of a liquid fuel motor while having the added safety of not blowing flamable kerosene all over the place if it blows up.
PPS -- you need an destructive devices permit to build high power rocket motors. You also need a safe place a long ways away from any non-involved people to test them. In this age of terrorism awareness, expect the FBI, CIA, and BATFE to be all over you if you try to build one withoout the proper permits. Heck, expect them to be crawling up your rear end with a microscope every 2 or 3 weeks even if you DO have the permits.
2006-12-19 05:57:00 · answer #1 · answered by Mustela Frenata 5 · 0⤊ 0⤋
if you know about rocketry I would suggest building a model to scale, and testing various designs, ( cheaper and easier ) do it small first.
When you get it right then go big,
a 300mph bike would crush the speed record, ( I think you need something with a lot more kick than K1 and nitro, ) kerosenes flash point and burn rate isnt high enough ,
however you can build a turbine engine that runs on K1 for a few grand that would easily help you on your way to the coffin, ( thats a jet ) not a rocket.
OMO
2006-12-19 05:51:12 · answer #2 · answered by fighterace26 3 · 0⤊ 0⤋
You can achieve some kind of efficiency even with a crude cone nozzle (see the Wiki article), but your greatest challenge is going to be the choice of materials, as well as delivery of the fuel to the combustion chamber. These things have a tendency to explode. And most materials won't be able to handle the high temperatures involved even if it didn't explode. Best bet would be to use solid carbon, and try to machine it. Get insurance first. I mean life insurance.
2006-12-19 06:00:42 · answer #3 · answered by Scythian1950 7 · 1⤊ 0⤋
The problem with R & D on a nozzle if you don't know what you are doing is that you really want to start pick, and work your way down.
This means that you cannot start with a block of metal (nickel alloy) and start with a small hole, and if you don't like it, make it bigger. If you try to go this way, you will blow up your combustion chamber.
There are some on-line references to help you. Search "nozzle sizing" and "rocket". There are other fools just like you out there.
2006-12-19 08:51:45 · answer #4 · answered by www.HaysEngineering.com 4 · 1⤊ 0⤋
i might could say that person is actual clueless. The rocket engine is getting extra useful and extra gas efficent not as quickly as autos yet getting there. the key's what variety of rocket engine he became talking approximately sturdy gas or liquid gas. sturdy gas can in basic terms get extra efficent by changing the formula of the gas it makes use of. an occasion may be one formula gets me one hundred lbs of thrust in keeping with pound of gas and yet another formula gets me one million,000 lbs of thrust in keeping with pound of gas. The mechanics of those rockets is in simple terms too easy to refine as they're extremely in simple terms tubes with a nozzle on the tip. something is gas. The Liquid rocket on the different hand would properly be sophisticated and is sophisticated generally so as that a engine that sucked up a great variety of area in a motor vehicle interior the 60's now's in simple terms 2/3rds that length and particular extra useful probably much extra gas efficent with computing device controled gas pumps and valves. desire this became useful.
2016-12-30 15:58:33 · answer #5 · answered by sterman 3 · 0⤊ 0⤋
Watch "October Sky," that is a big part of the movie.
2006-12-19 05:53:42 · answer #6 · answered by Anonymous · 0⤊ 0⤋