Actually, the Jetex series are actually sold fuel <u>rocket</u> motors as they do not "inhale" any air. Several sizes were made from the mini Jetex 35, the most popular Jetex 50, a Jetex 150-legal for AMARocketry and Payload competition, and the mighty Jetex 600 or Scorpion. The original fuel, in solid pellet form, was derived from bat guano and later removed from the market as the military used it in their missiles, such as the Sidewinder. I don't have any proof of this but that was the rumor of the day. Jetex then offered a different fuel composition which burned much hotter and melted the gasket seals between the motor case and nozzle. It was also difficult to get this replacement fuel to burn reliably as you had to scatch or score the surface and use a coil of fuse to get alightoff.Several kits wereavailable for Jetex motors franging from simple balsa gliders tobuilt-up stick and tissue scale models-some were imports from the UK. Jetex motors have long been discontinued but replaced by a Rapier series availablefromthe Czech Republic. These are flown in AMAfreeflight rocketry competition. I cut my eye teeth on these very early "jet" motors.

Art ARRO