Allison Gas Turbines

Allison Branch Newsletter Articles

Thanks to the generosity of the Rolls-Royce Heritage Trust Allison Branch, Inc., the AEHS is pleased to reprint a series of John Leonard's feature articles from the Allison Branch newsletter.

The Rolls-Royce Heritage Trust is one of the world's great engine information resources. Memberships are reasonably priced and provide a number of benefits.

For more information, see the Rolls-Royce Heritage Trust web pages under the home page Links tab.

The F-80 TriJet
A White Paper on XF-84H Propulsion

Rolls-Royce Allison 250 Images from AirVenture 2009
Photos by Tim Wheat

Rolls-Royce (Allison) 250-B17F cutaway. 450 hp @ takeoff, 380 hp @ normal cruise, 377 hp @ 90%, 314 hp @ 75%, pressure ratio 7.9:1, output shaft 2,013 rpm @ 100%, gas generator 50,970 rpm @ 100%, power turbine 33,290 rpm @ 100%, specific fuel consumption ranges from 0.613 lb/shp-hr @ takeoff  t0 0.673 lb/shp-hr @ 75% cruise, 205 lb dry weight.