The Geiger HDP 13.5 is a German electric motor for powering electric aircraft, designed and produced by Geiger Engineering of Seigendorf, Hirschaid, Oberfranken.
[1] The HDP 13.5 is a brushless 58 volt design producing 13.5 kW (18 hp), with an outrunner coil.
The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for a reduction drive.
[1] Data from Tacke[1] Related development
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