Handling Accessory Loads on a Free Turbine Engine

The advantages and disadvantages of driving accessories from the gasifier section of a free turbine engine are reviewed. Because of the elevating effect of power extraction from the gasifier shaft on turbine inlet temperature in an existing engine, an analysis is made of factors influencing that temperature. Some of the techniques available for avoiding excessive turbine inlet temperature as a result of heavy accessory loads are listed, several of them being illustrated by past vehicular installations.