Aus der ARocket-Mailingliste:

"The hardest part was not making the thing itself but finding a way ot get the fuel into it at a decent rate. For the ramjet itself I chucked the shell into my drill press and with a file ground off the excess material around the primer so the end tapered down to the extractor groove. I opened up the primer pocket to about 1/4" and drilled a 1/8" hole about a 1/4" from the end of the case. I took a 1/16" ID brass tube and crimped the end so only a small orifice remained inserted that into the hole so the orifice would spray the fuel into the center of the shell.

I soldered the injector tube in place and made a fuel tank from a few film cans. I hot melt glued some film cans and pieces of tubing together. One can, the fuel tank had a tube coming out of the bottom for the fuel, the top of it had a tube going into it from another can. The fuel can had some alcohol in it and the other can which had a tube going all the way to the top had vinegar in it. The top can was left open til I was ready to fire it, and then I added some backing soda and caped it off. The baking soda and vinegar reacted and the CO2 came through the tube into the alcohol and pressurized the fuel tank. At that point the ramjet had already been hooked up to an air compressor and had a big igniter in it. I hit the switch and it made a nice hum and a huge flame for about 6 or 7 seconds until the fuel ran out.

It was pretty cool but the fuel system didn't work that well."

Eine Babelfish-Übersetzung versucht mit Dateien zusätzliches Material zu entfernen und findet besser gekleidetere Taschen in dem Text, von daher...

Oliver



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