Howitzer, Light, Towed: 105 mm, M-101 and M-101A1
The M101A1 howitzer consists of a cannon (105mm howitzer M2A2), recoil mechanism (M2 series), and carriage (105mm Howitzer, M2A2). The cannon itself is comprised of the tube assembly, breech ring, and locking ring. The cannon is mounted on the recoil sleigh assembly. The firing mechanism is a continuous pull (self cocking) type activated by pulling a lanyard.
The cannon is single-loaded, air-cooled and uses semi-fixed ammunition. The howitzer fires a 105mm (4.2-inch diameter) projectile which can be adjusted for distance and target. The M101 can be used for direct or indirect fire.
The carriage is of the single axle and split trail type. The trails are divided at emplacement, but are drawn together and locked during travel. A drawbar is provided for securing to a prime mover. The carriage consists of an equilibrator, shield, elevating mechanism, cradle, gear, elevating arcs, traversing mechanism, top carriage, wheels, and trails.
The recoil mechanism is a constant hydropneumatic type shock absorber that decreases the energy of the recoil gradually and so avoids violent movement of the cannon or carriage. It is installed in the cradle of the carriage.
The M102 105mm howitzer began replacing the M101A1 105mm Howitzer starting in 1964.
Specifications of the M101 or M101A1 Howitzer
| Length | 19.5 feet (5.94 meters) |
| Width | 7.25 feet (2.21 meters) |
| Height | 5.66 feet (1.73 meters) |
| Weight | 4,980 pounds (2,260 kilograms) |
| Bore diameter | 105 mm |
| Maximum effective range | 6.99 miles (11.27 kilometers) |
| Rate of fire: Maximum | 10 rounds per minute |
| Rate of fire: Sustained | 3 rounds per minute |
Two-and-a-half ton truck (deuce and a half) towing an M101 105 mm howitzer along the Algerian beach with troop ships in the background. World War II, North Africa, 1942-1943.
CH-21C Shawnee transporting M101 105mm howitzer, 1960s
M101 105mm howitzer in Vietnam.
U.S. troops firing M101 105mm howitzer, Grenada, 1983.
Marines from 11th Marines, 1st Marine Division fire a M101 105 mm Howitzer during the playing of taps at the Iwo Jima 60th Anniversary Commemorative on 26 March 2005. Camp Pendleton, CA.
M101A1 105mm Howitzer at 1st Cavalry Museum, Ft. Hood, TX, 31 March 2006. Photo: Courtesy of Bob Pettit.
M101A1 105mm Howitzer at 1st Cavalry Museum, Ft. Hood, TX, 31 March 2006. Photo: Courtesy of Bob Pettit.
M101A1 105mm Howitzer at 1st Cavalry Museum, Ft. Hood, TX, 31 March 2006. Photo: Courtesy of Bob Pettit.
