Jetex 100
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The Jetex 100 was one of the first to be marketed by Wilmot Mansour. It had three helical springs to act as a safety valve.
Rated equivalent to a 0.3 cc diesel, its end surge could give up to 1½ oz - 1¾ oz of thrust.
There were two derivatives. The original drawn case later gave way to a turned version. Eventually, and despite its popularity, this version was eventually replaced by the Jetmaster.
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Jetmaster
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The Jetmaster was a sophisticated motor designed for use with an augmenter tube, hence the unusual nozzle shape. It was useful for large scale models and contest work.
It was criticised as a result of the many parts that made up the end cap and the "flimsy" nature of the mounting bracket. The venturi-shaped nozzle required a special tool, which was supplied, in order to clean the nozzle after every flight and the instructions have repeated warnings to ensure such precautions were taken.
In defence of the Jetmaster, it must be said that it was not necessary to tamper with the many parts that made up the end cap, and the difficulties encountered with the mounting bracket and wick threading could be overcome with ingenuity. They were more than compensated by the efficient springing, augmented thrust and the fact that the motor could take an extra half pellet increasing the duration to 22 seconds.
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