The phrase "enemy plane" is correct and commonly used in written English.
It refers to a hostile or opposing aircraft in a military or war context. Example: "The soldiers fired their anti-aircraft guns at the enemy planes flying overhead."
My father was a Normandy veteran and my mother was an enemy plane spotter.
Israel shot down its first enemy plane, an Egyptian Spitfire, in the hours after its declaration of independence in 1948.
Two young pilots roaring off into the gray skies to hunt down an enemy plane, a Dornier flying boat.
All that had been excluded by the crop was the hostile speck of the enemy plane on which the Penguin one was swooping.
He oversaw the day-to-day work and the testing that created the SCR-584 (for Signal Corps Radio), a microwave radar device with a sophisticated scanning technique to track an enemy plane and a computer to adjust automatically the angle of antiaircraft guns to shoot it down.
But the merriment here is countered by a smaller image (1977) of the playland as a hellhole, with a grisly clown holding grotesque masks; rockets and an enemy plane in the air; grim men on horseback rushing off in the foreground; and amusement rides like Wonder Wheel seen as sardonic mockeries.
Elsewhere in the Pacific, Lieutenant Morehead shot down four enemy planes.
Brave Arab fighters were shooting enemy planes from the sky, they proclaimed.
As the enemy planes flew in, I would check the height they were flying.
This is a homage to the "dazzle" camouflage invented during the First World War to confuse enemy planes.
His pilots were so successful in downing enemy planes that they dubbed their combat missions "turkey shoots".
