Maybe shoot a little propane, it will light off easier. Do you want the afterburner effect or the rolling orange ball of flame effect?

I assumed you wanted this effect http://image2-0.rcuniverse.com/e1/fo...30/Al71960.jpg

here's nice vid of same truck-- it's called "Shock Wave" and Mr.Shockley really puts on a show- thats hot!!! >

http://www.break.com/index/semi-truc...t-engines.html

From the picture, I would try to do that with straight propane. Low pressure, short duration, and you can control it with a solenoid valve. Plus, you could have one small bottle on board, last a long time for short duration boosts.

Hmmmmm, So, the question I have is does anyone know if there is indeed any usable oxygen left over in the exhaust? There must be some, but is it enough to do...... you know what! I wonder if there is a way to actually calculate it? I suppose you would have to know what the combustion pattern physically looks like inside the CC to figure out just how many of the holes are simply supplying "Cooling air" to the exhaust stream, if any.

Also, I just wanted to get some clarification on the afterburner situation. I remember reading in the rules set forth by the AMA that no Turbine shall have an afterburning capability. Does this mean that they aren't supposed to period, or does this mean that if the turbine does have an afterburning capability that you will not be covered by insurance?

Brandon

There is plenty of Oxygen
He does not want an afterburner
AMA for a luge?

Hi Bob,


Even though you don't want or need any boost you still need to understand AB design in order to have flames. If you inject fuel directly to the exhaust stream it won't burn but will vaporize and give off a lot of smoke. I doubt that even a very fine mist will help.

There are 2 things you can try.
1) Preheat the fuel. Wind the tube around the outside of the tailcone. You need to experiment with the length of the tubing. Too short and the fuel won't vaporize properly. Too long and the fuel may burn in the tube giving off little explosions and possibly blowing a hole in the tube.

2) You need some kind of flame holders. A small wedge with the pointy end pointing at the turbine. Have the injector blow the fuel into the "sheltered" area behind the wedge. This is like sheltering a candle from the wind with your hand. The idea is to prevent the wind from blowing it out.

If you don't want any boost then this should be enough. Dump enough fuel there and you should get a nice flame. Actually getting boost from an AB is much more difficult. It has been done, though. [link=http://www.airtoi.com/special/spec2.htm]http://www.airtoi.com/special/spec2.htm[/link]