Editing Allison Engine Company (section)

===Post-war===
With the need for the V-1710 winding down at the end of the war, Allison found itself with a large production infrastructure that was no longer needed. For this reason, in 1947, the Army decided to take [[General Electric]]'s versions of [[Frank Whittle]]'s [[jet engine]]s and give them to Allison to produce instead. The main production model was GE's {{convert|4000|lbf|kN|abbr=on}} I-40, produced as the [[Allison J33]]. By the time production ended in 1955, Allison had produced over 7,000 J33s.

Allison also took over GE's [[axial flow]] engine design, becoming the [[Allison J35]]. The J35 was the primary powerplant for the [[F-84 Thunderjet]] and [[F-89 Scorpion]], as well as appearing on numerous prototype designs. The J35 also finished production in 1955, by which point over 14,000 had been delivered.

Allison also began development of a series of [[turboprop]] engines for the U.S. Navy, starting with the [[Allison T38|T38]] and a "twinned" version as the [[Allison T40|T40]]. The Navy was interested only in the T40,{{Citation needed|date=November 2009}} but the complexities of the drive shaft arrangement doomed the engine and the project was eventually cancelled. Allison tried again with the [[Allison T56|T56]], basically an enlarged T38 with the power of the T40, and was eventually rewarded when this engine was selected to power the [[C-130 Hercules]].  Allison turboprop engines were also used to re-engine [[Convair]] prop airliners which resulted in the [[Convair 580]] turboprop passenger aircraft which was widely used by local service and regional airlines in the U.S. such as [[Allegheny Airlines]], the original [[Frontier Airlines]], [[North Central Airlines]], as well as major carriers [[American Airlines|American]], [[Eastern Airlines|Eastern]], [[United Airlines|United]], and [[Pan-Am]].

Over the years a family of engines based on the T56 configuration was developed, culminating in the T406/[[Allison AE1107]] turboshaft for the [[V-22 Osprey]], the [[Allison AE2100]] turboprop, used on newer models of the C-130 and the Allison/[[Rolls-Royce AE 3007]] turbofan which propels many regional airline aircraft, such as the [[Embraer]] [[ERJ 135]], [[ERJ 140]] and [[ERJ 145]] family of regional passenger jets that continue to be widely used in the airline industry.

One of Allison's most successful projects is the [[Allison Model 250|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 initial version of the [[Sikorsky S-76]] helicopter.