What are the disadvantages of radial engines?
One more disadvantage of the radial engine is that it’s difficult to cool the pistons that are not in front of the engine. Since radials are mostly air-cooled, the front row of pistons has no issues getting cooled by the air coming from the propeller. Radial aircraft engines arrange cylinders in a circular pattern around a central crankshaft. The radial engine offers better air cooling and durability compared to the inline engine. The master rod and articulating rod system makes their operation unique.Their massive frontal area creates drag and limits pilot visibility. Radial engines need significant airflow to cool the cylinders, so engine placement on the aircraft is limited. It’s nearly impossible to install a multi-valve valve train – so nearly all radial engines use a two-valve system, limiting power.