TheGeiger HDP 13.5 is a Germanelectric motor for poweringelectric aircraft, designed and produced byGeiger Engineering of Seigendorf,Hirschaid,Oberfranken.^[1]

The HDP 13.5 is abrushless 58volt design producing 13.5 kW (18 hp), with an outrunner coil. It has a 93% efficiency. The low working rpm of the engine means that it can turn a propeller at efficient speeds without the need for areduction drive.^[1]

Data from Tacke^[1]

• Type:Brushless electricaircraft engine
• Length: 181 mm (7.1 in)
• Diameter: 215 mm (8.5 in)
• Dry weight: 4.70 kg (10.4 lb)

• Coil type:outrunner
• Cooling system: air
• Reduction gear: none

• Power output: 13.5 kW (18 hp)
• Voltage: 58V nominal
• Power-to-weight ratio: 2.9 kW/kg

Related development

• Geiger HDP 10

Related lists

• List of aircraft engines

• Official website

• Aircraft electric engines

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