PPRuNe Forums - View Single Post - Efficiency of jet engines

30th Dec 2002, 20:51

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Private jet

Join Date: Nov 2001

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Steam (external combustion) engines = 20%
Piston (internal combustion) engines = 30%
Gas turbine engines = 30%
Electric motors = 95% !!

These figures are of course very approximate due to the range of variables involved.