Rolls-Royce Heritage Trust Allison Branch, located in Indianapolis, Indiana, USA, is responsible for maintaining and promoting all aspects of the rich heritage of Allison, which became part of Rolls-Royce in 1995.
The display includes an extensive collection of Aircraft Engines made by Rolls-Royce and USA predecessor Allison Engine Company.
Starting with World War 1, the catalog ranges from; V-12 Liberty, to WWII V1710, W3420 – the largest liquid cooled engine to fly, J-33, J35, J71, Viper turbojets, Spey, TF-41 Turbofans, Dart, T40,T56, AE2100 Turboprops, T56 in a full nacelle, automotive gas turbines, Pegasus and XJ-99 VTOL engines, the Joint Strike Fighter LiftFan, Concorde Olympus, AE1107 turboshaft, AE3007 Civil turbofan, Minuteman II rocket motor case and a very broad collection of large scale models associated with each engine.
Archives are maintained and are accessible on request to researchers and collectors. Over 7,000 detailed photographs are maintained in the historic archive collection.