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M67
M67A2

Flame Thrower Tank M671-3

M67: General
Date of first acceptance 1955 Total acceptances 74
Manufacturer Chrysler Corp. Crew
3 men:
  • Commander in turret right rear
  • Gunner in turret right front
  • Driver in hull center front
M67: Dimensions
Combat weight 104,790lbs
47,532kg
Height over cupola periscope 121.6"
308.9cm
Length without gun, with fenders 274.3"
696.7cm
Gun overhang forward 49.9"
127cm
Width over tracks 143.0"
363.2cm
Tread 115.0"
292.1cm
Ground clearance 16.5"
41.9cm
Fire height ~79"
~200cm
Turret ring diameter 85.0"
216cm
Ground pressure, zero penetration 11.8psi
.830kg/cm²
M67: Armament
Type Mount Ammunition Traverse Max traverse rate Elevation Max elevation rate
Flame Thrower M7-6 Flame Thrower Tank Turret M1 365gal usable
1380L usable
360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
4°/sec
.50cal M2HB MG Cupola M1 on turret 725 rounds 360°
(manual and hydraulic)
-- Manual and hydraulic +60° to -10°
.30cal M73 MG Coaxial to flame gun 3500 rounds 360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
4°/sec
Night vision
Infrared periscope M24 for driver
M67: Armor
Assembly
Welding
Hull
Cast homogeneous steel
Location Thickness Angle from vertical
Upper front 4.33"
11.0cm
60°
Lower front 4.0" to 2.4"
10cm to 6.1cm
53°
Front sides 3.0" equivalent
7.6cm equivalent
Rear sides 2.0" equivalent
5.1cm equivalent
Upper rear 1.38"
3.51cm
30°
Lower rear 1.0"
2.5cm
60°
Top 2.25"
5.72cm
90°
Front floor 1.5"
3.8cm
90°
Rear floor 1.0"
2.5cm
90°
Turret
Cast homogeneous steel
Location Thickness Angle from vertical
Gun shield 4.5"
11cm
30°
Front 7.0" equivalent
18cm equivalent
Sides 3.0" equivalent
7.6cm equivalent
Rear 2.0" equivalent
5.1cm equivalent
Top 1.0"
2.5cm
90°
M67: Automotive
Engine Continental AV-1790-7C; 12 cylinder, 4 cycle, 90° vee gasoline
Horsepower Net: 704@2800rpm
Gross: 810@2800rpm
Torque Net: 1440 ft-lb@2000rpm
Gross: 1610@2200rpm
Fuel capacity 200gal
757L
Transmission General Motors CD-850-5, 2 ranges forward, 1 reverse
Steering Mechanical, steering wheel
Brakes Multiple disc
M67: Suspension
Type Road wheels Track return rollers
Torsion bar 6 independently sprung dual/track 5 dual/track
Drive sprockets Idlers Shock absorbers
11-tooth rear drive Dual compensating at front of track;
dual auxiliary track tension wheel behind last road wheel
On first 2 and last road wheels/track
M67: Track
T97E2
Center guide, double pin, rubber chevron
Width 28"
71cm
Pitch 6.94"
17.6cm
Shoes/track 79 Ground contact length 157.5"
400.1cm
M67: Performance
Max level road speed 28mph sustained
45kph sustained
Max trench 102"
259cm
Max sideslope 40% Max grade 60%
Max vertical obstacle 36"
91cm
Min turning diameter Pivot
Max fording depth 48"
120cm
Cruising range ~70mi
~110km

The M67 was based on the M48A1 tank. The main armament was composed of the fuel and pressure unit M7 combined with the flame gun M6, and the flame gun was placed in a dummy 90mm gun tube to disguise the vehicle as a regular gun tank. The dummy tube was shorter and thicker than the actual 90mm gun tube, and was fitted with drainage drip shields and holes that allowed entrance of air for combustion. A cover on top of the tube let crews get to the flame gun ignition assembly. The loader's hatch provided access to the fueling and charging controls for the flame thrower; consequently roof turret access was restricted to the TC's cupola. The main fuel container had a 398gal (1510L) capacity, but the usable volume was less due to various losses. The headlight brush guards were modified on the M67 to clear the flame gun's larger depression angle, and the auxiliary engine muffler was moved from the rear deck to the right rear fender to make way for the flame fuel container vent. All M67s were used by the US Marine Corps.

The M67A1 was first built in 1955--although not standardized until January 1959--and used the hull of the M48A2. The fuel and pressure system was modified, and the main weapon was now the M7A1-6. The improved turret control system from the M48A2 was used, and the gunner received a 1.5x XM30 periscopic sight in contrast to the M67's unitary periscopic sight M21. This was the only version used by the Army, and weighed 105,790lb (47,896kg). Thirty-five M67A1s were constructed by Chrysler.

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Flame Thrower Tank M67A22-3

M67A2: General
Date of first acceptance 1962 Total acceptances 108
Manufacturers
  • Chrysler Corp.
  • Anniston Army Depot
  • Red River Army Depot
Crew
3 men:
  • Commander in turret right rear
  • Gunner in turret right front
  • Driver in hull center front
M67A2: Dimensions
Combat weight ~107,000lbs
~48,500kg
Height over cupola periscope 121.6"
308.9cm
Length without gun 270.5"
687.1cm
Gun overhang forward 49.9"
127cm
Width over tracks 143.0"
363.2cm
Tread 115.0"
292.1cm
Ground clearance 16.5"
41.9cm
Fire height ~79"
~200cm
Turret ring diameter 85.0"
216cm
Ground pressure, zero penetration 12.1psi
.852/cm²
M67A2: Armament
Type Mount Ammunition Traverse Max traverse rate Elevation Max elevation rate
Flame Thrower M7-6 Flame Thrower Tank Turret M1 365gal usable
1380L usable
360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
4°/sec
.50cal M2HB MG Cupola M1 on turret 600 rounds 360°
(manual and hydraulic)
-- Manual and hydraulic --
.30cal M73 MG Coaxial to flame gun 3500 rounds 360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
4°/sec
Night vision
Infrared periscope M24 for driver
M67A2: Armor
Assembly
Welding
Hull
Cast homogeneous steel
Location Thickness Angle from vertical
Upper front 4.33"
11.0cm
60°
Lower front 4.0" to 2.4"
10cm to 6.1cm
53°
Front sides 3.0" equivalent
7.6cm equivalent
Rear sides 2.0" equivalent
5.1cm equivalent
Exhaust grille 1.0" equivalent
2.5cm equivalent
Lower rear 1.6" to 1.2"
4.1cm to 3.0cm
30° to 60°
Top 2.25"
5.72cm
90°
Front floor 1.5"
3.8cm
90°
Rear floor 1.0"
2.5cm
90°
Turret
Cast homogeneous steel
Location Thickness Angle from vertical
Gun shield 4.5"
11cm
30°
Front 7.0" equivalent
18cm equivalent
Sides 3.0" equivalent
7.6cm equivalent
Rear 2.0" equivalent
5.1cm equivalent
Top 1.0"
2.5cm
90°
M67A2: Automotive
Engine Continental AVDS-1790-2A; 12 cylinder, 4 cycle, 90° vee, supercharged diesel
Horsepower Net: 643@2400rpm
Gross: 750@2400rpm
Torque Net: 1575 ft-lb@1750rpm
Gross: 1710@1800rpm
Fuel capacity 385gal
1460L
Transmission General Motors CD-850-6A, 2 ranges forward, 1 reverse
Steering Mechanical, steering wheel
Brakes Multiple disc
M67A2: Suspension
Type Road wheels Track return rollers
Torsion bar 6 independently sprung dual/track 5 dual/track
Drive sprockets Idlers Shock absorbers
11-tooth rear drive Dual compensating at front of track On first 2 and last road wheels/track
M67A2: Track
T97E2
Center guide, double pin, rubber chevron
Width 28"
71cm
Pitch 6.94"
17.6cm
Shoes/track 79 Ground contact length 157.5"
400.1cm
M67A2: Performance
Max level road speed 30mph sustained
48kph sustained
Max trench 102"
259cm
Max sideslope 40% Max grade 60%
Max vertical obstacle 36"
91cm
Min turning diameter Pivot
Max fording depth 48"
120cm
Cruising range ~300mi
~480km

The M67A2 was again solely a Marine initiative, and brought the flame tank hull up to M48A3 standard. In addition to the work on the hulls, the M67 turrets were improved to M67A1 standard.

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References

  1. Standard Military Vehicle Characteristic Data Sheets. Center Line, MI: Army Tank and Automotive Command Reasearch & Engineering Directorate, July 1960.
  2. Hunnicutt, R.P. Patton: A History of the American Main Battle Tank, volume 1. Navato, CA: Presidio Press, 1984.
  3. Crismon, Fred W. U.S. Military Tracked Vehicles. Osceola, WI: Motorbooks International, 1992.

Last updated 5 Dec 2013.
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© Copyright 2012-13 Chris Conners