Today in WW II: 17 Oct 1941 USS Kearny [DD-432] torpedoed but not sunk by German submarine U-568, near Iceland, killing 11 sailors, the first American military casualties of WW II. More ↓
17 Oct 1943 At Gothenburg, about 10,000 seriously wounded and sick German and British POWs, about half from each side, make up the first British-German prisoner exchange of WW II [17-21 Oct].
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.
M55 8-inch Self-Propelled Heavy Howitzer (G259)
The M-55 8-inch Self-Propelled Howitzer is the sister vehicle to the M53 155mm Self-Propelled Gun, differing almost entirely in the mounted gun and a few other details. Both were manufactured by Pacific Car and Foundry based on the M46, M47 and M48 Patton tanks. The M53 155mm gun tube is longer and thinner than the tube of the 8-inch gun mounted on the M55, the main way to visually distinguish the two models. M55 8-inch SP Howitzer was known as the T108 in prototype.
The M53 and M55 self-propelled artillery were employed by the U.S. Army and Marine Corps beginning in 1952. Most of the M53 155mm Self-Propelled Medium Guns were converted to M55 8-inch Self-Propelled Heavy Howitzers, starting in 1956. The requirement for air-transportable heavy artillery, powered by diesel engines, led to the replacement of these units with the introduciton of the M-107 175mm Self-propelled Howitzer and M-110 8in Self-propelled Howitzer in the early 1960s, gradually phasing out the M53 and M55.
M-55 8-inch Self-Propelled Howitzer Specifications
||Continental AV-1790-5B, 5C, 5D, gasoline
Since the introduction of the M53 and M55 self-propelled artillery in 1952, there have been published Technical Manuals for the two models jointly. The original manuals were numbered in the TM 9-xxxx series, superseded in the late 1950s by the current numbering system of the form TM 92350210-xxx. Examples include:
- TM 9-2350-210-12 Operator's and Organizational Maintenance Manual (M53 and M55) (30 JUL 59 to Change 9 06 AUG 71)
- TM 9-2350-210-20P Organizational Maintenance Repair Parts and Special Tool Lists (M53 and M55) (17 NOV 59 to Change 2 10 SEP 62)
- TM 9-2350-210-ESC Equipment Serviceability Criteria (June 1964)
The M55 Howitzer, Heavy, Self-Propelled was assinged FSN 2350-739-3841 and then NSN 2350-00-739-3841.
M-55 8-inch Self-Propelled Howitzer (right) with the M53 155mm Self-Propelled Gun.
M55E1 8-inch Howitzer Motor Carriage, Aberdeen Proving Ground, MD.
M55 8-inch SP Howitzer, Vietnam. The name painted on the barrel appears to be BIGFOOT..