Complex sentence: The R-4360 was a 28-cylinder four-row radial engine with each row slightly offset from the previous, forming a semi-helical arrangement to facilitate cooling of the successive rows of cylinders.
Split into simpler sentences: The R-4360 was a 28-cylinder four-row radial engine. Each row of pistons was slightly offset from the previous, forming a semi-helical arrangement to facilitate cooling of the successive rows of cylinders.