Linked from
The 7 pages that link to Radial engine, each with the reason it gives.
CrankshaftRelated: Its compact central crankshaft converts motion from pistons arranged around it.
Piston engineBroader topic: Its distinctive cylinder arrangement powered many propeller aircraft.
V engineCompared with: Its circular cylinder arrangement contrasts with the V’s two linear banks.
Douglas DC-3Related: The DC-3’s Pratt & Whitney R-1830 engines used this configuration.
Straight engineCompared with: Its circular cylinder arrangement differs sharply from a straight row.