The Bristol Hercules 734 radial engines that powered the type, along with all of its major subsystems such as the cowling, oil tank, cooler and control cables, could also be easily detached for servicing; an entire engine replacement could be performed within 90 minutes. The fuel system is uncomplicated, being contained within a pair of 300-gallon fuel tanks positioned in the interspar bays of the wings; neither fuel tanks or hydraulic pipelines were present in the outer wings. The only elements needing hydraulic systems were the clamshell doors and flaps. The electrically controlled carburation system had three different intakes, each suited to starting the engine under different conditions – these being hot, sub-zero, and temperate climates.