US Helicopter Weapon and Armament Sub-Systems used in Vietnam - Part 2

Page Title - US Helicopters
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Helicopter Armament Subsystems Part 2


XM31 Armament Subsystem. The XM31 was a Research and Development project for a fixed twin-mount of the M24A1 20mm cannon on the UH-1B "Huey", with 600 rounds of ammunition per gun. The gun was flexible in elevation. Only two prototypes were built.

XM32 Armament Subsystem. The XM32 was a Research and Development project for flank defense for the ACH-47A Armed/Armored Chinook. It included mounts and ammunition boxes for four M2 .50 Cal. machine guns or four M60D 7.62mm machine guns or any mix of the two machine guns.

XM33 Armament Subsystem. The XM33 was a Research and Development project for mounting an M2 .50 Cal. machine gun or M60D 7.62mm machine gun with ammunition boxes on the loading ramp of the ACH-47A Armed/Armored Chinook.

XM34 Armament Subsystem. The XM34 was a Research and Development project for a fixed twin mount of the M24A1 20mm cannon with ammunition boxes on the ACH-47A Armed/Armored Chinook.


M24A1 20mm cannon on XM34 armament subsystem

M35 Armament Subsystem (1968-1975). The M35 was a fixed-mount for the M195 six-barrel 20mm automatic gun for mounting on the port (left) side of the AH-1G "Huey" Cobra. The gun was basically a modified M61A1 Vulcan with shorter barrels and a declutching feeder. It automatically cleared itself of all live rounds at the end of each burst. The gun was pilot controlled, but controls were provided so either the pilot or gunner could fire the weapon. Two ammunition cans, containing 950 rounds of ammunition, were faired into the fuselage at the base of the stub wings. The gun has a firing rate of 750 rpm. Sighting was accomplished using the M73 reflex sight. The M35 was type classified Standard B (over 315 units were built).


Cobra mounted M195 20mm gun on
M35 armament subsystem

M41 Armament Subsystem (1966-1975). The M41 armament subsystem is a light weight quick removal ramp mount for the M60D 7.62mm machine gun, with ring-type sight, with 200 rounds of ammunition, for use on the CH-47A Chinook (similar to the XM33). The M41 was type classified Standard A (over 340 units were built).

M60D 7.62mm machine gun on M41 armament subsystem Ramp mounting M41 armament subsystem

XM47 Mine Dispensing Subsystem (ARDEC). The XM47 was a Research and Development project for dispensing four XM2 anti-personnel mines from the UH-1B "Huey". Sighting was visual.

XM50 Armament Subsystem. The XM50 was a Research and Development project for a combination M5 40mm grenade launcher and an M21 armament subsystem with twin side-mounting M134 "miniguns" and twin seven-tube 2.75 inch rocket launchers for use on the UH-1B/UH-1C "Huey".

XM51 Armament Subsystem (1966-1972). The XM51 was a Research and Development project for a flexible chin-mounting M129 40mm grenade launcher with 780 rounds of linked ammunition in a storage drum with associated ammunition chutes for use on the AH-56A Cheyenne. Sighting was accomplished using the XM110 helmet sight, XM112 swiveling gunner's station, or XM114 reflex sight

XM52 Armament Subsystem (1966-1972). The XM52 was a Research and Development project for a belly turret for mounting an XM140 30mm automatic gun, with 2,010 rounds of linkless ammunition in a storage drum with conveyor, beneath the AH-56A Cheyenne. Sighting was accomplished using the XM110 helmet sight, XM112 swiveling gunners station, or XM114 reflex SIGHT

XM52 Smoke Generating Subsystem. The XM52 was a Research and Development project for generating smoke from a UH-1D/UH-1H "Huey". Atomized fog was produced by introducing oil into hot engine exhaust gasses. The system consisted of a 50 gal. self-sealing rubber oil tank, pipes, nozzles, pump, and control unit.

XM53 Armament Subsystem (1966-1969). The XM53 was a Research and Development project for chin-mounting of an XM196 six-barrel 7.62mm "minigun", with 11,570 rounds of linkless ammunition in a storage drum with conveyor, on the AH-56A Cheyenne The XM53 was an alternate to the XM51. Sighting was accomplished using the XM110 helmet sight, XM112 swivelling gunners station, or XM114 reflex sight.

M59 Armament Subsystem (1968-1974). The M59 was a door pintle mount for an M60D 7.62mm or an M213 .50 Cal. machine gun for use on the UH-1D/UH-1M "Huey". The XM59 was essentially an M23 armament subsystem adapted for port (left) side mounting of the .50 cal. machine gun. There was also a Research and Development project for mounting an XM175 40mm grenade launcher. The M59 was type classified Standard B (245 units were built). > XM59 Armament Sub5ystem for M213.50 cal. machine gun > XM59 Armament Subsystem with M213 machine gun > XM59 door pintle mount with M213 machine gun

XM64 Armament Subsystem (1966-1969). The XM64 (TAT-102) was a Research and Development project for a chin-mounting turret for a single M134 "minigun", with 8,000 rounds of ammunition, for use on the AH-1G "Huey" Cobra. The XM64 evolved from the chin-turret developed for the Bell Sioux Scout. The XM64 was fully flexible. The XM64 saw limited production (169 units were built). The XM64 was replaced by the larger XM28 (TAT-141) armament subsystem which mounted two 7.62mm "miniguns" or two 40mm grenade launchers, or one of each.

XM93/XM93E1 Armament Subsystem (1969-1975). The XM93 was a Research and Development project for a door pintle mount for the M134 7.62mm "minigun" for use on the UH-1D/UH-1H "Huey". The M134 could be used on a XM93 (12 units built) flexible pintle mount or in a XM93E1 (over 383 units built) fixed forward position for remote firing by the pilot. One XM93 (or XM94) could be mounted in either door. Ammunition capacity was 10,500 rounds for the XM93 and 12,000 rounds for the XM93El. The XM93 was used with the M60E1 reflex sight. > X993 Armament Subsystem pintle installation with XM157 seven-tube 2.75 inch rocket launcher

XM94 Armament Subsystem (1969-1975). The XM94 was a Research and Development project for a door pintle mount for the M129 40mm grenade launcher, with 800 rounds of ammunition, for use on the UH-1D/UH-1H "Huey". The XM94 could be used on a flexible pintle mount or fixed in a forward position for remote firing by the pilot. The XM94 could be vertically pivoted to a stowed position inside the aircraft when not in use. The XM94 was interchangeable with the XM93/XM93E1 for the M134 7.62mm "minigun". The XM93 was used with the M60E1 reflex sight.

XM118 Smoke Grenade Dispensing Subsystem. The XM118 was a Research and Development project for launching 12 smoke grenades from launchers mounted on the wing stubs of the AH-1G "Huey" Cobra. The grenade launcher could also be strapped under the XM157B 2.75 inch rocket launcher.

XM120 Armament Subsystem. The XM120 was a Research and Development project for a chin-turret mount of the XM140 30mm gun on the AH-1G "Huey" Cobra. The XM120 was a fully flexible, hydraulically driven, electrically operated turret. > XM120 30mm gun turret on AH-1G Cobra > XM140 30mm gun on XM120 armament subsystem 

M156 Armament Subsystem (1966-1975). The M156 was a twin mount for carrying external stores on the UH-1B/UH-1C/UH-1M "Huey" and the AH-1G "Huey" Cobra., including sighting and fire control. It was generally used with the seven-tube M158/M158A1, or the 19-tube XM159B/XM159C and M200 2.75 inch rocket launchers. The M156 was used with the M16 and M21 armament subsystems. The M156 was type classified Standard B (over 238 units were built).

M156 armament subsystem with M20019-tube rocket launcher

XM165 Canister Cluster Subsystem. The XM165 subsystem was a Research and Development project for dispensing CS smoke grenades from the XM15 cluster mounted on the UH-1 "Huey". Each 24-tube XM165 dispenser consisted of two 12-tube XM15 dispensers attached to a hinged strongback assembly fitted with suspension lugs, arming wire and explosive bolt. > XM165 CS Smoke Grenade Dispenser

Maxwell system (XM3/M22 hybrid). The Maxwell system was a combination of a M3 2.75 inch rocket launcher field modified from 24-tube to 18-tube and a field modified M22 missile launcher mounting only a single AGM-22B wire-guided anti-tank missile.

MINI-TAT Turret. The Emerson MINI-TAT (Tactical Armament Turret) was a proposal for an add-on turret for the M134 7.62mm "minigun" that could be mounted quickly, in about one hour, on the UH-1 "Huey" or the OH-58A Kiowa. The turret folded to the right side when not in use. It unfolded downward, beneath the plane of the skids, during operation. > "minigun" mounted on MINI-TAT Turret on OH-58A Kiowa > MINI-TAT Turret folded down into operational position

Sagami Mount. The Sagami mount was a door mount for the M60D 7.62mm machine gun for the UH-1B/UH-1C "Huey". It was very similar to the M23 armament subsystem. The Sagami mount was produced at the U. S. Army Depot, Sagami, Japan. The Sagami mount saw limited production (over 1,000 units were built).

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US Helicopter Weapons


Sources

Aircraft Armament, Systems and Components, U. S. Army Weapons Command, Rock Island, December 1971.

Aircraft Weaponization, Subsystem Photographs and Descriptions, U. S. Army Weapons Command, Rock Island, September 1970.

Small Arms of the World, 12th edition of the W.H.B. Smith Small Arms Manual, The Stackpole Co., Harrisburg, 1983.


 

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