Whats a Jam Jar and how can i build one?

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Stephen H
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Whats a Jam Jar and how can i build one?

Post by Stephen H » Wed Aug 11, 2004 6:36 am

A Jam Jar is a type of valveless pulsejet that was invented by Francois H. Reynst of Switzerland, it’s also called a Reynst jar because of his name. These are simple jets that can be made using a average jam jar with a hole in the lid about 12-13mm diameter. Approximately 5mm of methylated spirit’s is put into the bottom of the jam jar, the lid is placed on and with the whole covered with your finger shake it. Then it can be lit. this will show pulsed combustion for about 8 seconds before the jar breaks of heat.

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