Guiberson T-1020 1021 C.I. 9 cylinder diesel radial engine

This is a Guiberson T-1020 9 cylinder diesel radial engine used in the M3 tank. Started by a 4 cylinder Wisconsin pony motor. The motor is rated at 310 HP @ 2,150 RPM. More information can be found here... http://www.enginehistory.org/Diesels/Ch3.pdf