M110A1 American 203mm Self-Propelled Howitzer (SPH)
M110A1
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Basic Information
Name
M110A1 American 203mm Self-Propelled Howitzer (SPH)
Designation
M110A1
Alternate Designation
M110A1
Equipment Type
—
Manufacturer
General Motors Corp
Date of Introduction
1977
Description
The M110A1 American 203mm Self-Propelled Howitzer (SPH), is a variant of the M110 American 203mm Self-Propelled Howitzer. Versions of the M110 with the longer barrel are the M110A1 (no muzzle brake) and the M110A2 (fitted with muzzle brake). In 1977, the first M110A1s entered service; these were armed with the longer 8" howitzer M201. The M201 allowed greater range over the shorter M2A2 howitzer. The M110A1s had been limited to zone 8 of the M188A1 propelling charge, but the muzzle brake alleviated excessive recoil forces and allowed the howitzer to fire zone 9, which permitted greater range. The M110A1 replaced both the M110 and M107, which were phased out of service with the US Army in Europe by 1980. It then cost less than USD100,000 to convert the M107/M110 to the M110A1/M110A2 standard.
Ground Specifications
Crew
5
Engine
Detroit Diesel 8V-71T 569-cu in (9.32-liter) liquid-cooled, 2-stroke, turbocharged V-8 diesel (805 hp)
NBC Protection
Yes
Variants
M110A2
improved variant of the M110A1. It entered service in 1978 and was fitted with double muzzle brake. Maximum range of fire was increased to 29 km.
System
Alternative Designation
M110A1
Manufacturer
General Motors Corp.
In Service
1977-Present
Family
M110 Series
Crew
5 (commander, driver, 3 gunners) ea
Resupply Vehicle
+ 8 in the associated M548 ammunition resupply vehicle.
Chassis
chassis identical to the M110's
Displacement Time
1 min
Emplacement Time
1 min
Note
Support crew of 8 men are carried by an escorting armored personnel carrier, which also transports ammunition for this SPH.
Dimensions
Length, with Gun Forward
10.72 m
Length, Hull
5.72 m
Barrel Length
8.36 m
Width
3.15 m
Height (To the Top of the Barrel)
3.15 m
Weight, Combat
31.2 tons
Weight, Unloaded
28.1 tons
Ground Pressure
0.76 kg/sq cm
Length of Track on the Ground
3.94 m
Track Width
0.39 m
Automotive
Engine Name
1 x Detroit Diesel 8V-71T Engine
Engine Type
Detroit Diesel 8V-71T 569-cu in (9.32-liter) liquid-cooled, 2-stroke, turbocharged V-8 diesel
Engine Power
805 hp
Power-to-Weight Ratio
14.28 hp/metric ton
Cruising Range
523 km
Speed, Maximum Road
55 km/h
Speed, Average Cross
15
Speed Maximum Swim
Not Amphibious km/h
Gradient
60 deg
Side Slope
30 deg
Vertical Step
1 m
Trench
2.3 m
Fording Depth
1.2 m
Fuel Capacity
1,137 liters
Suspension
Torsion bar, 5 road wheels, front drive, last road wheel acts as rear idler, shock absorber on each road wheel, no return rollers ability to lock suspension out when firing rear-mounted hydraulic spade for bracing firing platform.
Communications
Primary Radio
INA
Secondary Radio
INA
Main Gun
Note 1
The M110A1 carries only 2 rounds. Ammunition is carried by escorting armored personnel carrier.
Note 2
M110A1 can fire only up to charge 8.
System
Name
M201 Howitzer, 203mm Howitzer
Type
203 mm
Length, Barrel
8.24 m
Breech Type
Interrupted Screw
Recoil Type
Hydro-pneumatic
Max Rate of Fire
2+ rd/min
Normal Rate of Fire
1 rd/2 min
Muzzle Brake Type
No Muzzle Break, which allows the M110A1 to fire further than the M110.
Max Elevation
+65 deg
Min Elevation
-2 deg
Traverse Range
60 deg
Traverse Left
30 deg
Traverse Right
30 deg
Ammunition (Option 1)
Type
M650
Type
HERA
Caliber
203 mm
Projectile Length
1,116 mm
Projectile Weight
90.78 kg
Muzzle Velocity
710 m/s
Maximum Effective Range
30,000 m
Basic Load
2 ea
Fuse Type
INA
Ammunition (Option 2)
Name
M509
Type
DPICM
Caliber
203 mm
Projectile Length
1,115 mm
Projectile Weight
96.6 kig
Muzzle Velocity
711 m/s
Maximum Effective Range
22,500 m
Basic Load
2 ea
Fuse Type
INA
Ammunition (Option 3)
Name
M106
Type
HE
Caliber
203 mm
Projectile Length
871 mm
Projectile Weight
92.53 kg
Muzzle Velocity
713 m/s
Maximum Effective Range
21,300 m
Basic Load
2 ea
Fuse Type
INA
Note
The M110 can also fire the following types of 203mm projectiles: M404 HE, M426 CHEM.
Fire Control
Name
INA
Computerized FCS
INA
Thermal Sight Vehicle Commander
Infrared night-vision equipment
Thermal Sight Gunner
Infrared night-vision equipment
Main Gun Stabilization
INA
Direct Fire Telescope
Direct Dire Elbow Telescope
Protection
Hull Armor
20-mm maximum (estimated)
Turret Armor
20-mm maximum (estimated)
Applique Armor
No
Explosive Reactive Armor
No
Active Protection System
INA
Mine Clearing
No
Self-Entrenching Blade
INA
NBC Protection
Yes
Smoke Equipment
INA
IR Signature
INA
Note
This artillery system carries no defensive armament, except individual weapons carried by the crew.
Details
Country of Origin
United States
Category
Self-Propelled Gun/Howitzer Artillery Systems
Land > Artillery > Self-Propelled Gun/Howitzer Artillery Systems
Filter Label
M
Classification
Domain
Ground
Equipment Status
Active
Dimensions
Length
—
Width
3.15 m
Height
—
Weight
31200 kg
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