Air Turbine Starter Sizing for a Proper Bleed Source Match

This paper presents a description of the sizing process for air turbine starters. The emphasis is on optimum system performance through proper component matching.

The system includes all equipment from the pneumatic energy source, through the air delivery duct system, to and including the starter itself. While the load imposed by the engine defines the power output required at the starter, the limitations of the available bleed-air source and delivery system often dictate the starter size. All pneumatic system components must be properly matched to provide the smallest, lightest combination of components that will meet the engine starting requirements.