Fire Support Team Vehicle M9811-3

M981: General
Date of first acceptance 1975
Manufacturer Emerson Electric Co. Crew 4 men
M981: Dimensions
Combat weight 27,900lbs
12,700kg
Height, head erected 134.25"
341.00cm
Length 208.5"
529.6cm
Gun overhang forward 0"
Width over track shrouds 105.75"
268.61cm
Tread 85.0"
216cm
Ground clearance 17.1"
43.4cm
Ground pressure, zero penetration 8.9psi
.62kg/cm²
M981: Armament
Type Mount Ammunition Traverse Elevation
7.62mm M60 MG Flexible in cupola mount 800 rounds 360°
(manual)
Manual
Night vision
Infrared periscope M19 for driver, AN/TAS-4 night sight
Rangefinder
G/VLLD
M981: Armor
Assembly
Welding
Hull
Rolled 5083/5086 H32 aluminum armor
Location Thickness Angle from vertical
Upper front 1.5"
3.8cm
45°
Lower front 1.5"
3.8cm
30°
Upper sides 1.75"
4.45cm
Lower sides 1.25"
3.18cm
Rear 1.5"
3.8cm
Ramp 1.5"
3.8cm
Top 1.5"
3.8cm
90°
Floor 1.125"
2.858cm
90°
M981: Automotive
Engine General Motors 6V53; 6 cylinder, 2 cycle, vee diesel
Horsepower Gross: 212@2800rpm Torque Gross: 492 ft-lb@1300rpm Fuel capacity 95gal
360L
Transmission Allison TX-100, 3 ranges forward, 1 reverse
Steering DS200 controlled differential, steering levers
Brakes Differential band
M981: Suspension
Type Road wheels Track return rollers
Torsion bar 5 individually sprung dual/track Flat track
Drive sprockets Idlers Shock absorbers
10-tooth front drive Dual adjustable at rear of track On first, second, and last road wheels/track
M981: Track
T130E1
Center guide, single pin, steel with detachable rubber pad
Width 15"
38cm
Pitch 6"
15cm
Shoes/track Left side: 63
Right side: 64
Ground contact length 105"
267cm
T150
Center guide, double pin, steel with chevron rubber pad
Width 14.81"
37.62cm
Pitch 6"
15cm
Shoes/track Left side: 63
Right side: 64
Ground contact length 105"
267cm
M981: Performance
Max level road speed 40mph
64kph
Max water speed 3.6mph
5.8kph
Max trench 66"
170cm
Max grade 60%
Max vertical obstacle 24"
61cm
Min turning diameter 26'
7.9m
Max fording depth Floats Cruising range ~300mi, roads
~480km, roads

The M981 was based on the M113A2 APC with the external fuel tanks, and utilized other components of the M901 ITV. The hammerhead turret was used in the FIST-V, but instead of TOW missiles, a ground/vehicle laser locator designator (G/VLLD), north-seeking gyrocompass, and night sight were carried. By utilizing this design, artillery observers could take advantage of hull-down positions as well. The targeting head could elevate from +38° to -23°. M981A3 used the RISE powerpack from the M113A3 APC.

Home       Vehicle list       Top

                     



References

  1. Hunnicutt, R.P. Bradley: A History of American Fighting and Support Vehicles. Navato, CA: Presidio Press, 1999. Reprinted with permission from Bradley, R.P. Hunnicutt ©1999, available from Presidio Press, 505B San Martin Drive, Suite 160, Navato, CA 94945.
  2. Crismon, Fred W. U.S. Military Tracked Vehicles. Osceola, WI: Motorbooks International, 1992.
  3. Federation of American Scientists. "M981 Fire Support Team Vehicle (FISTV)." DOD 101. 12 Sep 1998. 4 Jun 2001 <http://www.fas.org/man/dod-101/sys/land/m981.htm>. DOD 101

Last updated 20 Mar 2006.
Questions? Comments? Corrections? Email me
© Copyright 2001 Chris Conners