Starter Generators

Starter Generator

UAV manufacturers face a complex set of trade-offs to meet the performance requirements for any given application.  The permanent magnet brushless generator or starter generator is a critical component for ensuring the electrical system can meet the design objectives of the aircraft. 

ePropelled Gwynt series are the most versatile starter generators in their category. Its slim line design boasts a patent pending active air cooling system that allows it to operate in temperatures in excess of 200°C in certain applications. Our unique patent pending adaptor allows bearing less mounting of the starter generator directly on to engines.

 Designers need to understand the trade-offs in starter generator specifications that will have a major impact on the success of their UAV.  Weight, operating temperature and efficiency have a major influence on performance parameters such as flight duration, payload, operating ceiling and range.  In addition, the starter generator must integrate with other electrical system components.

Best in Class Temperature Range

ePropelled’s patent pending technology enables high continuous operating temperature range (up to 200°C) in its class. This allows UAVs to operate at higher altitude where the air is thinner or where it is in an enclosed environment.

Low Weight 

The Gwynt outer rotor series boasts the lowest weight in its class with outstanding power density.

High Efficiency

Lightweight and compact design combines a high power density (2.3kW/kg continuous, 6kW/kg peak) with high efficiency (above 90%).

Find the Right Model

ePropelled has a range of off the shelf options. Click on the link to download the data sheet from our resource library.


  • Bearingless option available with dedicated mounting jig
  • Directly driven on engine crankshaft with customizable shaft coupling ring
  • Optional customizable active air-cooling rotor hub
  • Optional K-type thermal sensor to measure winding temperature

Our series of starter generators can be customized to meet your exact application including low and very high power output options. ePropelled offers a range of electrical system components, such as PMUs, that are engineered to work with these starter generators.

Contact us to discuss your specific requirements.