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The 5M twin-cam that looked like a V12
While he was struggling because no existing engine could reach 200 km/h cruising, Okada found a strange engine that looked like a V12 in the engine test building. It was a 5M converted to twin-cam, with the head split left and right. Wanting it as a dedicated engine for the Soarer, he asked for formal development through the Product Planning Office rather than as the engine division's own project. The first Soarer was fitted with this 5M-GEU twin-cam.
