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Allison X-4520 RRHTAB rear Hemi Engine, Car Engine, Diesel Engine, Aircraft Engine, Ww2 Aircraft, Military Aircraft, Air Force Memes, Vw Aircooled, Tractor Pulling
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Allison X-4520 24-Cylinder Aircraft Engine

The 24-cylinder X-4520 engine was designed by the Power Plant Section at McCook Field and refined and built by Allison in 1925. A four-year delay before the engine was run left… 
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