#aircraft engine

can you guess which fighters these engines belong to?

Rolls-Royce Made in the U.S.A. Packard Merlin Engine. When the Merlin crossed the Atlantic, it got an American makeover. Packard, the luxury car maker building it, didn't just copy the design. They re-engineered it for mass production. A key upgrade was hidden deep inside: the crankshaft bearings. They swapped Rolls-Royce's alloy for a superior silver-lead combination, a secret recipe from General Motors, making the engine tougher and more reliable under the strain of combat.

Mary Farley working on a Wright Whirlwind aircraft engine at the Naval Air Base, Corpus Christi, Texas