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AE 3007 on an Embraer ERJ 145. In 1988, Allison Engine Company (then owned by General Motors) and Rolls-Royce plc began joint studies of a 33 kN (7,400 lb f) RB580 to power the proposed Short Brothers FJX regional jet, combining the T406 core with a Rolls-Royce low-pressure spool.
After the United States Air Force gives Convair a contract to install an Allison J33-A-29 jet engine with afterburner in place of the Allison J33-A-23 in the Convair XF-92A, 46-0682, test pilot Chuck Yeager attempts ferry flight from Edwards AFB, California to the Convair plant at San Diego but engine fails immediately after takeoff, forcing an ...
Allison Transmission Holdings Inc. is an American manufacturer of commercial duty automatic transmissions and hybrid propulsion systems. Allison products are specified by over 250 vehicle manufacturers and are used in many market sectors, including bus, refuse, fire, construction, distribution, military, and specialty applications.
Allison's manager, Norman Gilman, decided to experiment with his own high-power cylinder design. Allison's engine became Manufacturer Serial No. 1, AAC S/N 25-521. It was the X-4520, a 24-cylinder air-cooled 4-bank “X” configured engine designed by the Army Air Corps and built by the Allison Engineering Company in 1925.
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Allison transmission families for the Bus Series include the 1000/2000 Series (B210, B220, B295), 3000 Series (B300 / B400), and 4000 Series (B500). [ 5 ] Within North America, Bus Series transmissions carry a "B" prefix to distinguish them from other vocational series transmissions manufactured by Allison.
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Initially the Allison 1000 was a 5 speed transmission, rated to handle up to 620 lb⋅ft (840 N⋅m) of torque. This rating has increased as the transmission was updated several times, to stand at 765 lb⋅ft (1,037 N⋅m) by 2011 in GM truck applications.