ADVANCED COMBAT TRANSMISSIONS - THE SAPA ACT1000, ACT850 & ACT1075

This paper describes the architecture, capabilities, and readiness of the SAPA Advanced Combat Transmission (ACT) family. The ACT850, ACT1000, and ACT1075 utilize scalable and modular technology across the product line, applicable to tracked vehicles weighing 35 thru 75 tons. The ACT family of transmissions are designed to improve the size, weight, power, and cooling (SWaP-C) characteristics of armored vehicle powertrains. Common features of the ACT family include high efficiency (>90%), low heat rejection under all operating conditions, 32 speed mechanical propulsion in forward and reverse; high efficiency mechanical steering delivering smooth agility from pivot turns thru straight paths and enabling use of lower power electric motors to provide for silent maneuverability; drive-by-wire control interface to reduce operator fatigue and training requirements; and reduced powertrain cooling, weight, and space claim impacts on the vehicle.