TM61

Martin MGM-1 Matador
Type	Surface-to-surface cruise missile
Place of origin	United States
Service history
In service	1952 - 1962
Production history
Manufacturer	Glenn L. Martin Company
Specifications
Weight	12,000 lb
Length	39 ft 6 in
Diameter	4 ft 6 in
Warhead	Nuclear W-5 (40 kt yield)
Engine	4,600 lbf (20,000 N) thrust Allison J33-A-37 Turbojet sustainer engine; 55,000 lb (25,000 kg) thrust Aerojet General solid fuel rocket, 2 s burn
Wingspan	28 ft 7 in
Operational range	700 miles
Flight altitude	35,000 ft
Speed	Approximately 650 mph (Mach 0.9)
Guidance system	"A" Radar directed radio command guidance system; "C" same plus Shanicle
Launch platform	Transporter erector launcher

The Martin MGM-1 Matador was the first operational surface-to-surface cruise missile built by the United States. It was similar in concept to the German V-1, but the Matador included a radio command that allowed in-flight course corrections. This allowed accuracy to be maintained over greatly extended ranges of just under 1000 km. To allow these ranges, the Matador was powered by a small turbojet engine in place of the V-1's much less efficient pulsejet.

Matador was armed with the W5 nuclear warhead, essentially an improved version of the Fat Man design that was lighter and had a smaller cross section. A single US Air Force group, 1st Pilotless Bomber Squadron, was armed with the weapon, keeping them on alert with a six-minute launch time. It could be easily retargeted, unlike weapons using inertial guidance systems. Accuracy at maximum range was about 1 mile (1.6 km), which allowed it to be used against any large target like troop concentrations or armored spearheads.

First flown in 1949, Matador entered service in 1952 and left service in 1962. Matador carried several designations during its lifetime, originally known under the War Department's system as SSM-A-1. By the time it was introduced to service the Air Force had been created, and they referred to them as bombers and assigned it the B-61 designation. It was later re-designated TM-61, for "tactical missile", and finally MGM-1 when the US Department of Defense introduced the tri-service aircraft designation system in 1962.

The first flight of Matador, model XSSM-A-1, occurred at the White Sands Missile Range on 20 January 1949. The first two production B-61 Matador missiles arrived at Eglin AFB, Florida, in September 1953, under the control of the 6555th Guided Missile Squadron, for climatic testing, although instrumentation and pre-test check-outs kept the actual cold-weather tests from beginning until November. At the end of 1953 the first squadron was operational, but not deployed until 1954, as the 1st Pilotless Bomber Squadron, Bitburg Air Base, Germany with the B-61A armed with the W5 nuclear warhead. The missile was capable of carrying a 2000-pound conventional warhead, but it is unknown if any of these were actually deployed. By the late 1950s at least, all Matadors carried the nuclear warhead.