Allison T56
The Allison T56 ( civilian version of Model 501) is a wave turbine of the U.S. manufacturer Allison Engine Company, which has been used since the mid-1950s, especially in the transport aircraft Lockheed C -130 Hercules. With a production start in 1954, the T56 from all major Turboproptriebwerken is the longest located in series production patterns. 2009 surpassed it with an uninterrupted production period of 55 years in this regard, the Kuznetsov NK - 12th There are four main series have been developed which provide power 3250-5250 WPS. Following the acquisition of Allison by Rolls -Royce, the engine under the name "Rolls -Royce Allison T56 " is marketed.
History
The T56, the first test runs in 1949 were made at the factory Indianapolis, was a development of the Allison T38 turboprop. A pre-production sample was installed in 1954 for experimental purposes in the nose of a Boeing B -17 ( 44-85747 USAF-Seriennr. ), followed by the attempt installation of any two YT56 in two Convair CV -340 ( serial numbers 91 and 131) after the conversion as YC - 131C were called. With over 3000 flight hours continuing flight testing was funded by the USAF. The engines delivered a power output of 3250 hp. Sequently sold the planes were given the unofficial name Convair 770
By February 1976, a total of 11,000 and until 1 January 1983 produced 13,000 copies.
Military variants
Civilian variant
The Model 501 is the civilian version of the T56 and has about 75 % common components with the military version. The main changes relate to the compressor housing, which consists of the forged parts and the installation of the reduction gear. The 501 can also use JP -1 fuel. With the Type Certificate on 20 May 1955, the 501, the first approved for civilian use turboprop was.
Use
- Lockheed C -130
- Lockheed P-3
- Lockheed Electra
- Grumman E-2 Hawkeye
- Grumman C-2 Greyhound