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The Allison Model 250, now known as the Rolls-Royce M250, (US military designations T63 and T703) is a highly successful turboshaft engine family, originally developed by the Allison Engine Company in the early 1960s. The Model 250 has been produced by Rolls-Royce since it acquired Allison in 1995.
One of Allison's most successful projects is the Model 250 turboshaft/turboprop engine family, which was started by the company in the early 1960s, when helicopters started to be powered by turbine, rather than reciprocating, engines. Allison turbine engines were used to power Bell 206 Jet Ranger and Long Ranger helicopters as well as the ...
Pages in category "Rolls-Royce aircraft gas turbine engines" The following 53 pages are in this category, out of 53 total. ... Allison Model 250; Rolls-Royce Medway ...
Pages in category "Allison aircraft engines" The following 18 pages are in this category, out of 18 total. ... Allison Model 250; P. Pratt & Whitney/Allison 578-DX; T ...
To meet an Italian Army requirement for a short take-off liaison aircraft, SIAI-Marchetti modified the design of the Cessna 305A/O-1 Bird Dog with a new turboprop engine and a revised tail unit. The prototype first flew on 24 May 1969 powered by a 317 hp (236 kW) Allison 250 -B15C turboprop engine.
Allison T40 (Allison 500, 503) Allison T44; Allison T54; Allison T56 (501-D) Allison T61; Allison T63; Allison T71; Allison T78 [22] Allison T80; Allison T406 (AE1107) Allison T701 (Allison 501-M62) Allison T703 (Allison 250) Allison TF32; Allison TF41 (development of Rolls-Royce Spey) Allison GMA 200; Allison GMA 500; Allison AE3010; Allison ...
The first production model, powered by two Allison Model 250-C20 turboshaft engines. It made its first flight on 4 August 1971. Initially, the A109 was marketed under the name of "Hirundo" (Latin for the swallow), but this was dropped within a few years. A109A EOA Military version for the Italian Army. A109A Mk.II
The RR300 is the second attempt to develop a lower-rated version of the Model 250, coming 20 years after the 350 shp Allison Model 225 of 1987. [ 2 ] The five-seat Robinson R66 light helicopter features the RR300 as a turboshaft engine, Robinson having originally intended on utilizing the standard Model 250-C20.
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