Analysis of information sources in references of the Wikipedia article "Motorjet" in English language version.
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..."motorjet" engine, which consisted of a compressor driven by a piston engine...
A rudimentary type of jet engine. At the heart the motorjet is an ordinary piston engine but instead of (or sometimes, as well as) driving a propeller, it drives a compressor. The compressed air is channeled into a combustion chamber, where fuel is injected and ignited. The high temperatures generated by the combustion cause the gases in the chamber to expand and escape at high velocity from the exhaust, creating a thermal reactive force that provides useful thrust.