Directory of U.S. Military Rockets and Missiles
Copyright © 2002 Andreas Parsch

Aerojet General SD-2/MQM-58 Overseer

In 1957, the Rheem Manufacturing Co. developed the surveillance drone for the U.S. Army's AN/USD-2 drone surveillance system. The drone itself was usually known as SD-2, but was sometimes also referred to as AN/USD-2, which was more properly the designation of the whole surveillance system, including ground equipment. Rheem's defense business was purchased in 1959 by Aerojet General, who developed a slightly improved version of the SD-2 as the Overseer drone.

The Overseer was a propeller-driven aircraft, which was launched by two solid-fueled rocket boosters from a zero-length launcher mounted on a V-260/USD truck. After completion of its mission, it was landed by a parachute recovery system. The Overseer's equipment included an AN/AAD-2 infrared sensor, and a realtime data transmission system. The SD-2 was reportedly also used to test the AN/DPD-2 side-looking radar.

Photo: via Ordway/Wakeford
SD-2 (MQM-58A)

In June 1963, the SD-2 Overseer drone was designated as MQM-58A. I have little information about the operational career of the MQM-58A, and it's possible that it never became fully operational with the U.S. Army. In any case, it was no longer used at the end of the 1960s.


Note: Data given by several sources show slight variations. Figures given below may therefore be inaccurate!

Data for MQM-58A:

Length4.09 m (13 ft 5 in)
Wingspan3.50 m (11 ft 6 in)
Height0.79 m (2 ft 7 in)
Weight500 kg (1100 lb)
Speed560 km/h (350 mph)
PropulsionLycoming piston engine; 165 kW (225 hp)

Main Sources

[1] Frederick I. Ordway III, Ronald C. Wakeford: "International Missile and Spacecraft Guide", McGraw-Hill, 1960
[2] Norman J. Bowman: "The Handbook of Rockets and Guided Missiles", Perastadion Press, 1963

Back to Current Designations Of U.S. Unmanned Military Aerospace Vehicles
Back to Directory of U.S. Military Rockets and Missiles

Last Updated: 5 March 2002