The LBD-1 Gargoyle (later KSD-1, KUD-1 and RTV-N-2) was an American air-to-surface missile developed during World War II by McDonnell Aircraft for the United States Navy.

[3] Intended for carriage by carrier-based aircraft, Gargoyle was of fairly conventional small-aircraft design, weighing 1,500 pounds (680 kg) when ready for launch, and fitted with a low-mounted 8-foot-6-inch (2.59 m) wing and v-tail attached to a streamlined fuselage, 10 feet 1 inch (3.07 m) in length,[3] containing a 1,000-pound (450 kg) armor-piercing bomb.

[1] An Aerojet solid-propellant rocket, of the JATO type and providing 1,000 lbf (4.4 kN) of thrust,[4] was fitted to provide terminal boost to 600 miles per hour (970 km/h), and guidance was by radio command, the missile being tracked visually via a flare mounted in the tail section.

[5] Gargoyle's armor-piercing capability and the fact that it could be carried by carrier-based aircraft allowed development to continue despite late-war rationalizations of missile projects,[6] and following delivery of the first weapons to the Navy at the end of 1944 flight trials were begun in March 1945.

[1] A Gargoyle that was donated to the National Air and Space Museum in 1974 is on display at the Steven F. Udvar-Hazy Center.