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Northrop AQM-35: Difference between revisions

Revision as of 18:23, 9 August 2006

The AQM-35 program began life in 1953 as the Northrop Model RP-61 supersonic target drone. In June 1954 the United States Air Force awarded Northrop a contract for development of the project as the Q-4; the first flight-capable XQ-4 was launched in 1956.

The XQ-4 was capable of either ground or air launch, though the former mode was never tested. It was powered by an XJ81-WE-3 turbojet, allowing it to reach speeds of Mach 1.55. The drone's course was followed with radar, and flight commands were sent by a radio telemetry system. When the mission was completed the XQ-4 would deploy a three-stage parachute system along with four large inflatable airbags to cushion the impact with the ground.

The Air Force planned to use the Q-4 as a target for various surface-to-air and air-to-air missiles. A secondary reconnaissance function was planned, with TV or cameras carried.

In1963, the Q-4 family of drones were given the designation AQM-35A and AQM-35B. They were never considered entirely successful, with a variety of problems arising during both the development and flight testing phases. It was also considered that the flight performance of the drone was so high that it was not a realistic test for the missiles being developed - ironic since the whole point of the project was to develop a supersonic target. Only 25 of all types were ever built. The last examples of the type were retired during the 1960s.

Variants

The XQ-4A, was developed to use a have a Fairchild J83 engine and a modified radar signature for testing the CIM-10 Bomarc missile. When the engine could not be developed in time the variant was cancelled.

In1959 Northrop was given a contract to develop an improved Q-4B fitted with a much more powerful J85-GE-5 engine and a strengthened airframe. This variant was first flown in 1961.

Specifications

XQ-4/AQM-35A :

• Length : 10.06 m (33 ft)
• Wingspan : 3.38 m (11 ft 1 in)
• Diameter : 51 cm (20 in)
• Height : 1.69 m (5 ft 7 in)
• Weight : 900 kg (1,980 lb)
• Speed : Mach 1.55
• Ceiling : 18,300 m (60,000 ft)
• Propulsion : Westinghouse XJ81-WE-3 turbojet, thrust 8.0 kN (1,810 lbf)

XQ-4B/AQM-35B :

• Length : 10.77 m (35 ft 4 in)
• Wingspan : 3.86 m (12 ft 8 in)
• Diameter : 51 cm (20 in)
• Height : 1.88 m (6 ft 2 in)
• Weight : 1,540 kg (3,400 lb)
• Speed : Mach 2
• Ceiling : 21,300 m (70,000 ft)
• Propulsion : General Electric J85-GE-5 turbojet, thrust 17.1 kN (3,850 lbf)

See also

• List of missiles
• Unmanned aerial vehicle