Geiger HDP 10
# Geiger HDP 10

The Geiger HDP 10 is a German electric motor for powering electric aircraft, designed and produced by Geiger Engineering of Seigendorf, Hirschaid, Oberfranken.

## Design and development

The HDP 10 is a brushless 58 volt design producing 12.5 kW (17 hp) at 1950 rpm, 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 a reduction drive.

## Specifications (HDP 10)

Data from Tacke

### General characteristics

* Type: Brushless electric aircraft engine
* Length: 171 mm (6.7 in)
* Diameter: 215 mm (8.5 in)
* Dry weight: 3.75 kg (8.3 lb)

### Components

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

### Performance

* Power output: 12.5 kW (17 hp) at 1950 rpm
* Voltage: 58V nominal
* Best efficiency: 93%
* Power-to-weight ratio: 3.3 kW/kg
