Rolls-Royce AE 2100

The Rolls-Royce AE 2100 is a free-turbine turboprop engine developed by the Allison Engine Company, now part of Rolls-Royce North America, and known first as the GMA 2100 when Allison belonged to General Motors. It is a derivative of the Allison AE 1107C Liberty turboshaft (the Rolls-Royce T406) and shares that engine's high-pressure core, as does the Rolls-Royce AE 3007 turbofan. The two-shaft design was the first to use dual full authority digital engine controls for both engine and propeller, so that one lever adjusts both. Production variants are the civil AE 2100A and the military AE 2100D2/D2A, D3, J and P. It powers the Saab 2000, the Alenia C-27J Spartan, the ShinMaywa US-2 and, in D3 form, the Lockheed Martin C-130J Super Hercules.