»Rotorway
~ ACIS is lightweight and efficient, allowing helicopter engine to maintain standard sea level performance up to higher density altitude than ever before
~ by not demanding any more power at altitude than is produced at sea level, the life of the engine is unaffected, while its performance at higher altitude is enhanced
~ utilizing a belt-driven supercharger concept, cooler outside air is compressed to a set pressure
~ this method does away with hotter intake air and lag associated with a turbocharger
~ pressurized air from ACIS is made available to intake system through throttle valve
~ manifold pressure is limited only by amount of compressed air available
~ ACIS uses an electro-mechanical inlet gate control and is connected to FADEC which monitors and maintains proper limits

»Induction, Exhaust, and Turbocharger System Principles

»Weber Redline Fuel Injection Systems and Components

»Effect of Altitude on Propeller Choice
~ many modern engines which have electronic fuel injection have barometric pressure sensors in them
~ engine control module corrects for changes in atmospheric pressure such as those that occur with increasing altitude by adjusting fuel/air mixture ratio. ACIS

Related terms(s)
»Engine_Control »FADEC