Question: What multi-day event, officially known as the National Championship Air Races, uses an engine commonly used on Hawker Sea Fury and Grumman F8F Bearcat Unlimited Class Racers?
Sentence (from "Wright R-3350 Duplex-Cyclone"): It was a twin-row, supercharged, air-cooled, radial engine with 18 cylinders.
Relevant evidence: No