In the post-World War II period, Radioplane followed up the success of theOQ-2 target drone with another very successful series of piston-powered target drones, what would become known as theBasic Training Target (BTT) family (theBTT designation wasn't created until the 1980s, but is used here as a convenient way to resolve the tangle of designations). The BTTs remained in service for the rest of the 20th century.
Original OQ-19 on display at Aviation Unmanned Vehicle MuseumCommunications hardware for the BTT on display at the Aviation Unmanned Vehicle Museum
The BTT family began life in the late 1940s, evolving through a series of refinements with theUS Army designations ofOQ-19A throughOQ-19D, and the US Navy name ofQuail with designatedKD2R. Early models had a metal fuselage and wooden wings, but production standardized on an all-metal aircraft.
Radioplane developed an experimentalXQ-10 variant that was mostly made of plastic, but although evaluations went well, it wasn't considered a major improvement over existing technology, and it did not go into production.
Radioplane was bought out byNorthrop in 1952 to become the Northrop Ventura Division, though it appears that the "Radioplane" name lingered on for a while.
In 1963, when the US military adopted a standardized designation system, the surviving US Army BTT variants becameMQM-33s and the KD2R-1, the only member of the family still in Navy service, became theMQM-36 Shelduck.
The MQM-36 was the most evolved of the BTT family, but retained the same general configuration as the other members. It was larger and more sophisticated than the first-generation OQ-2A series, and was powered by a more powerful flat-four four-strokeMcCulloch piston engine with 72 hp (54 kW). The MQM-36 carriedLuneburg lens radar enhancement devices in its wingtips that generated aradar signature of a larger aircraft. The radar reflectors (Luneburg lens) wasn't used by the US Navy as the air search radar interfered with the control signals. Thus the air search radar was not used.
Launch was byRATO booster or bungee catapult, and recovery by parachute.
A variant of the BTT designated theRP-71,[2] also known as theSD-1 Observer and later redesignatedMQM-57 Falconer,[3] was built for battlefield reconnaissance, with first flight in 1955. The Falconer was similar in appearance to the Shelduck, but had a slightly longer and stockier fuselage. It had an autopilot system with radio-control backup, and could carry cameras, as well as illumination flares for night reconnaissance. Equipment was loaded through a hump in the back between the wings. Although it only had an endurance of a little more than a half-hour, making it of limited use, about 1,500 Falconers were built and the type was used internationally with several different military forces, remaining in service into the 1970s.
Over 76,000 BTT targets were built in all – more than any other type of aircraft – and the type was used by at least 18 nations.[4][failed verification]
^Newcome, Laurence R. (2004).Unmanned Aviation: A Brief History of Unmanned Aerial Vehicles. Reston, VA: American Institute of Aeronautics and Astronautics. p. 73.doi:10.2514/4.868894.ISBN978-1-56347-644-0.
Newcome, Lawrence R. (2004).Unmanned Aviation: A Brief History of Unmanned Aerial Vehicles. Reston, VA: American Institute of Aeronautics and Astronautics.doi:10.2514/4.868894.ISBN978-1-56347-644-0.
Taylor, John W. R.Jane's All The World's Aircraft 1966–67. London: Sampson Low, Marston & Company, 1966.
This article contains material that originally came from the web articleUnmanned Aerial Vehicles by Greg Goebel, which exists in the Public Domain.
