What is the largest radial engine ever built?
Pratt & Whitney R-4360 Radial Engine. Perhaps the the largest, most complex, and most powerful aviation piston engine ever built. The Pratt & Whitney R-4360 Wasp Major is an American 28-cylinder four-row radial piston aircraft engine designed and built during World War II. At 4,362. L), it is the largest-displacement aviation piston engine to be mass-produced in the United States, and at 4,300 hp (3,200 kW) the most powerful.
Why are radial engines not used anymore?
Turbine engines have better power-to-weight ratio Despite these drawbacks, the power of radial engines made them ideal for military applications. However, technological advancements have made them obsolete. That’s because the arrival of the jet engine allowed engines to output more power for the same weight. Radial engines have a distinct disadvantage compared to inline engines or V-type engines: they create considerable drag. The large, circular shape disrupts airflow around the aircraft and makes it less effective at high speeds.