For data and forecasts on current programs please visit www. or call +1 April M mm Self -Propelled Gun -. The M mm self-propelled Gun was largely deployed in NATO areas and its ammunition was commonly used throughout NATO forces. One such artillery piece is the M self-propelled howitzer. This mm artillery piece entered service in , alongside the M
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In the swage autofrettage process, a precision high-strength mandrel is pushed through an undersized bore of the tube to permanently enlarge 17m5m bore prior to final machining.
The dominant recognition feature of the M1107 is its colossal mm gun, which is thin, extremely long, and has a bull barrel. Unfortunately, what was to later become the science of fracture mechanics and related fatigue failure was not well understood or appreciated at this time, and the original mm M Gun experienced premature catastrophic brittle fracture at a very low round count.
In addition, the diesel allowed for a generous km range miles.
Your email address will not be published. In Vietnam, it was the only land-based US artillery piece that outranged the infamous Soviet mm M with a range of 27 kmand the M gained fame in the Siege of Khe Sanh for this feat. This page was last edited on 21 Decemberat Early barrels were limited to firings with the maximum zone 3 propellant, but later examples extended this to between and 1, firings with extensive bore scoping by the supporting U. The status of these weapons is uncertain, but they are probably still operable.
It is served by a crew of thirteen people, of which five only pilot, head of tank, and three gunners are on board. Army to issue a requirement for a new series of self-propelled artillery: The T and T unarmored recovery vehicles and the mm T were not developed further.
Some of the “newer” cannon designs in this era, such as the original mm M Gun on the M Self-Propelled System, experimented with what were considered very high strength steels for the time with gun steel strength levels aboutpsi yield strength. The 8-inch howitzer fired a pound projectile almost 17 kilometers, plus being the most accurate weapon in the field artillery.
The primary purpose of the hydraulic pump was putting the barrel into battery, ramming ammunition 1m07 charges, raising or lowering the rear spade, rapid coarse deflection adjustment by the j107 and rapid coarse elevation adjustments by the assistant gunner.
It equiped many countries, in particular the United States. All US-operated Ms were converted into MA2 howitzers bythough the latter has since been phased out of service as well.
M self-propelled gun – Wikipedia
M transports only two projectiles and their load. Army Service, the lowest level of retube was done at the Artillery Battalion’s maintenance shop.
It is highly doubtful that the M can be fired safely without deploying it.
Due to the tremendous size and weight of the ammunition, as well as the propellant charges used to project it, only 2 rounds are carried on the M itself. The M was used extensively in Vietnam to provide long range firesupport being able to fire more than 30 km and took part in numerous cross-DMZ duels with NVA guns.
They were truly state-of-the-art at the time and initially offered a superlative response to any Soviet artillery systems.
175mm Self-Propelled Gun M107
M Howitzer in Yuma, Retrieved 13 November Its sole and main armament consisted of a mm gun with a Barrel length of 60 calibers standard versionbut reduced to 30 at the origin, which fired a projectile weighing 79 kg at a 175mmm firing range of 40 km 34 at the originmaximum rate of fire or 1 rpm. Only vehicles were built but widely exported.
The Assistant gunner controls elevation. The hydraulic autofrettage procedure used in the early s was an expensive, difficult, slow, and sometimes dangerous procedure where pressurized hydraulic fluid, on 175mm order ofpsi or greater, was pumped into the m1107 of the tube to apply compressive residual stress at the bore.
The autofrettage process imparts a deformation to the bore of a cannon tube in order to increase the ballistic pressure sustaining capability of the tube. This long-range advantage, along with its ability to rapidly move from its previous position, made it an effective weapon for destroying North Vietnamese Army and Viet Cong command-and-control sites, communications facilities and supply-trains, while evading counter-battery fire from its longest-range Soviet counterparts in service with North Vietnam.
M mm Self-propelled Gun Walk Around Page 1
Retubing the barrel was necessary when the barrel had exhausted its service life, fractures were detected, or 175,m converting the M to an M