Rolls-Royce AE 2100J is an active turboprop variant in the AE 2100 family and powers the four-engine ShinMaywa US-2 amphibious aircraft. Rolls-Royce's current AE 2100 data sheet lists the exact J at 4,591 shp (3,376 kW) with a 16.6 pressure ratio; it also identifies a 14-stage compressor and two high-pressure and two low-pressure turbine sections without asserting an additional spool scalar.