MGR-3 Little John

The MGR-3 Little John was a free flight artillery rocket system designed and put into service by the U.S. Army during the 1950s and 1960s.

Description
Carried on the XM34 rocket launcher, it could carry either nuclear or conventional warheads. It was primarily intended for use in airborne assault operations and to complement the heavier, self-propelled Honest John rocket systems. Development of the missile was started at Army’s Rocket and Guided Missile Agency laboratory at Huntsville, Alabama, the Redstone Arsenal, in June 1955. In June 1956, the first launch of the XM47 Little John occurred. The Littlejohn was delivered to the field in November 1961 and remained in the Army weapons inventory until August 1969.

It was a fin-stabilized field artillery rocket that followed a ballistic trajectory to ground targets. The rocket XM51 consisted of a warhead, a rocket motor assembly, and an igniter assembly. The components were shipped in separate containers and assembled by the user.

The Little John differs from the Honest John in not only its size but how it is stabilized in flight. The flight of the Honest John is stabilized by a spin that is imparted to the rocket by spin rockets after the round leaves the launcher. The Littlejohn rocket flight is stabilized by applying spin to the rocket while on the launcher, just before firing. This manual method of stabilization was called "spin-on-straight-rail" (SOSR). The system was maufactured by the Douglas Aircraft Company.

The missile and launcher system were light enough to be easily transported by helicopters and other aircraft or towed by a vehicle. The Phase II Littlejohn weapon system was initially deployed with the 1st Missile Battalion, 157th Field Artillery in Okinawa, Japan.

The missile was retired beginning in July, 1967, with the final missile removed from inventory in 1970. Five hundred missiles were produced during the life of the weapon program.

Operators

 * 🇺🇸: United States Army

Specifications



 * Length: 14.5 ft
 * Diameter: 12.5 in
 * Missile weight: 780 lb
 * Combined weight of missile and launcher: 2000 lb
 * Warhead: W45 with a yield of 1 - 10 ktonTNT.
 * Propellant: solid rocket fuel
 * Maximum range: 10 nmi