Instructables

Step 10: Have fun making lots of noise and shaking the ground while impressing friends and neighbors with your new toy!

This is the fun part! Starting your new engine for the first time. The parts you will need are...
1) The engine
2) Ear defenders (ear muffs)
3) Lots of fuel (diesel, kerosine, or jet-a)
4) A leaf blower
5) a washcloth

This is where things get interesting. Firstly you set up the jet in a place where you can actually start it without making anybody mad with the loud noise. Then you fuel it up with your choice of fuel. I like to use jet-a because it just works well and has the right "smell" of a jet engine. Switch on your oil system and set the oil pressure to a minimum of 30 psi. Put on your ear defenders and spool up the turbine by blowing air through the engine with the leaf blower. Yes, you can use electric or air starting on these engines, but it is not the norm, and it is much easier to just use the leaf blower. Turn on the ignition circuit and slowly apply the fuel by closing the bypass needle valve on the fuel system until you hear a "pop" when the combustor lights. Keep increasing the fuel and you will start to hear the roar of your new jet engine. Gradually pull the leaf blower away and see if the engine speeds up on its own. If it does not, reapply the leaf blower and give it more fuel until it does. Lastly enjoy the sound of your new engine and remember to use the washcloth to clean up in case you poo your pants! There is so much power in these engines that it will startle you to the point of losing bodily control.

Videos of our running engines are available as flash movies below. We hope you enjoy them! You will probably need to size your browser down when viewing them so they are not pixelated.

That is about it. Our websites cover all of the build processes and hopefully will get you started on the journey of making your very own jet engine. Be sure to send us pictures if you make your own.

Combustor kits can be purchased by contacting Russ at Bad Brothers Racing. Different kits and configurations are available to help you in creating your jet engine. Fully assembled engines are also available to qualified buyers who sign a release of liability. The plans in this documentation and kit designs are Copyright 2006 Bad Brothers Racing, and may not be reproduced in any way, nor may they be sold.

Please remember that our websites are funded by donations and clicks on advertisements. If you feel generous, please help out with a monetary donation. If you are cheap, give us a few "clicks for the cause" to help the projects keep coming! See you soon, and we hope that you enjoy the sites!

This information was provided by Bad Brothers Racing and Gary's Jet Journal. Please visit our sites to see what is new as we update often with new and exciting projects.
http://www.badbros.net
http://www.garysjetjournal.com
 
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How big would this be? Also how much thrust would you get? I was thinking about turning this into a jet pack or something?
Nander21a3 years ago
Has Anybody gotten enough thurst out of one of these to get some lift for an aircraft?
jj.inc3 years ago
Does anyone know how to attach a direct drive, so you can gear it down and turn some wheels, this doesn't run like an engine on a jet plane, it is more like a modern tank that uses a turbine to spin a pump to spin a motor ext. Except this lacks the connection shaft and I am not sure how to do it.
Raphet1233 years ago
I am afraid this would not run on said diesel, kerosine, or jet-a, but i found with LNG it seems to run much more effective and efficient.

As for building it with aluminum, i found that this was a much simpler way of construction than the said methods above, due to the ease of which you can machine it.
yea, aluminum is a VERY bad idea, because of the gas it puts off when exposed to this kind of heat, its toxic and causes alzheimers, on top of that your bound to end up with a failing engine in general, and for machining your generally wrong, because special equipment is required to weld aluminum, and you can weld steel, iron, etc with basically any welder if you know what your doing and have the voltage skill and equipment
Ive seen a lot of these home made Jet's now. Whilst they seem to make a shed load of noise and produce impressive blue flames with an afterburner. They are still very low on thrust output. I belive to resolve this problem a seccond compressor is needed to run in serries with the first. Obviousley the first would need to be of a much greater diameter. such as a Diesel Locamotive Turbo compressor then pushing into a Garret T4 Compressor. Finaly before the Combustion chamber a large size (high Pressure) Intercooler could also help. The real task for a home Builder is how the bloody heck to drive both shafts with only one Turbine. But by Pre- compressing the air, then feeding it into a seccond compressor, then cooling the very hot gases with an Intercooler. You will have a far greater concentration of Oxygen and at a much cooler temerature as it first enters the combustion chamber. The result is a very efficient and powerfull combustion process. Last of all even a single stage turbine system could benefit from the use of an Intercooler. You just have to make sure you build one that can handle the very high pressures.
I slolved the thrust problem differently, I created pipe with holes drilled diagonally, this I then connected to the exhaust hole. It sort of works as a turbo on your exhaust, it increases your thrust incredibly high. I now hit speeds to about 150 mph.
killer wats the power to weight ratio i might try one see wat i cook on the exhaust
hiigaran6 years ago
suppose you make some of these jets and then add them onto an aircraft of 12m wing span and 6m fuselage length. would 2 or 3 be sufficient? and before anyone says that it wont produce enough thrust, consider this: the jet would have an intercooler, a secondary tank around the combustion chamber (main fuel tank delivers fuel here. purpose is to cool combustion chamber, and pre-heat the fuel for better combustion), and fuel injectors at the start of the exhaust nozzle for extra burning.
I was very interested in doing this a while ago but everything else got in my way and I never did get to an answer of possibility with the research I did. Now I really am dying to build a turbo jet for a project that I have been concoting and wanted something more than rocket power (it's not reusable) Have you any figures for the amount of thrust provided by your jet. I can easily aquire a reconditioned turbo of something big cheaply (thinking front loader or loading shovels as I know there are just the parts i need lying around people's workshops from now broken machines. also how much did the whole assembly weigh before and after you put on the afterburners.
ghandi7 years ago
very impressive project, have you built a pulse jet yet? PS:I think if you add an afterburner you will increase overall efficiency, though it will require more fuel.
russwmoore (author)  ghandi7 years ago
Hi, I have built a pulse jet. They are fun, but don't compare in power to a turbine. Still, their ease of construction makes them a great project to build in a few hours. As for the afterburner, I actually have dual burners on the bike right now. See our website www.badbros.net for more info on how things turned out!
kool idea, but won't the superbike burn your butt off? it looks like the engine's exhaust port is right where one's butt is traditionally placed.
russwmoore (author)  AlbinoBlackSheep7 years ago
The picture of the bike was just a mock up. For pictures of the real bike, go to my website at http://www.badbros.net and follow along for the entire build process.
Ogrecycle7 years ago
Me thinks after the Ogrecycle A jet cart is in my future thanks and good job!Ogrecycle
russwmoore (author)  Ogrecycle7 years ago
Glad you like the project. I think you will enjoy building one up. I enjoyed reading about the OgreCycle too! Nice contraption of parts that shouldn't go together, but did quite nicely! Keep up the good work!