They called them Capstans. It was the name of a popular brand of cigarettes leveraged as a code name so the enemy wouldn't know what they really were: Spitfires. When the RAAF took them on charge during World War II, they were the first of the type to appear in the Pacific theatre of war. They were secret. Ironically, the Japanese didn't understand the significance; they'd been mis-identifying P-40s as Spitfires for some time.
The Spitfire
