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Radials are reciprocating engines. Rotaries are not. The action of the connecting rod in a radial is the same as any other engine, the difference in a rotary is shown in the first post. That design, although ancient, is the only engine where the con rods orbit the crankpin. That is not a reciprocating action. If the cod rod rotated one time around the crank pin in a radial, or any other reciprocating engine, you have a blown engine with internal parts possibly sticking outside of the destroyed engine block.
regards
Mech
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