Russian engine Ritm 200 hp

zaitcev

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Pete Zaitcev
Apparently they wanted a 200 hp engine for drones and decided that a radial is a smart idea. This is what happens when your design culture is built around M-14P.

Among the whackiest tradeoffs made: flathead and direct-drive. Reminds me of D-motor. Note that the Rotec has a planetary step-down gearset. But I guess that would make the cylinders and conrods too lightweight, or something.

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engritm2.jpg
 
How odd. I don't recall ever seeing a flathead radial engine.
 
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