BELL P-63E KINGCOBRA
The most unusual P-63 variations were the RP-63A and RP-63C "Pinball" versions developed late in WWII. Aerial gunnery students fired at these manned target aircraft using .30-cal. lead and plastic frangible machine gun bullets which disintegrated harmlessly against the target's external armor plating. Special instruments sent impulses to red lights in the nose of the "pinball" aircraft, causing them to blink when bullets struck the plane.