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Orenda OE600
The Orenda OE600 is a 600 hp-class liquid-cooled 8-cylinder V-block aircraft engine intended to re-introduce piston power to aircraft normally powered by the famous Pratt & Whitney Canada PT6 turboprop. The piston engine offers much better fuel economy, which Orenda Aerospace felt would be attractive for older aircraft whose engines were reaching the end of their lifespan. However, changes in Orenda's business in the post-9/11 time frame led to the project being canceled.
==Design and development==
The engine traces its history to the "Generation 2" Chevrolet Big-Block engines of the 1960s. In 1969, General Motors adapted the engine to use a new aluminum block and pistons rather than cast iron, creating the ZL1. Originally, only 50 examples were produced in 1969 so they could be homologated for the CanAm series. Additional copies were produced to equip high-end versions of the Corvette, bringing the total production to 71.
In the late 1970s, Richard MacCoon, an aviation entrepreneur, and his brother, Grant MacCoon, owner of a Southern California automotive aftermarket products company, contacted Lee Muir, a racing engine builder, about adapting the ZL1 for aviation use. Eventually, a brand new engine, based on the linerless Reynolds 390 alloy Chevrolet used in the CanAm series, was designed and a small number of prototype engines were built. In addition to the engine components, a propeller reduction gear drive and accessory drive gear section were designed by Richard Lyndhurst, of Santa Ana, CA. The engine package included twin turbochargers and a liquid-to-air aftercooler.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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