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M67
M67A1
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 123.3125"
313.2138cm
Length without gun, with fenders 270.5"
687.1cm
Gun overhang forward 51.75"
131.4cm
Width over tracks 143"
363cm
Tread 115"
292cm
Ground clearance 15.25"
cm
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
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)
.50cal M2HB MG Cupola M1 on turret 725 rounds 360°
(manual)
-- +60° to -10°
(manual)
.30cal M73 MG Coaxial to flame gun 3500 rounds 360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
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 31.8mph
51.2kph
Max trench 102"
259cm
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 atomizer was fed by the secondary fuel system, which had a 10.2gal (38.6L) tank, and both systems were pressurized to 325psi (22.8kg/cm²). When fitted with a ⅞" (2.22cm) nozzle, the fuel would last 55 seconds; with a ¾" (1.9cm) nozzle, the tank could fire fire for 61 seconds. 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.

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Flame Thrower Tank M67A12-4

M67A1: General
Date of first acceptance 1955 Total acceptances 35
Manufacturer Chrysler Corp. Crew
3 men:
  • Commander in turret right rear
  • Gunner in turret right front
  • Driver in hull center front
M67A1: Dimensions
Combat weight 105,790lbs
47,896kg
Height 121.625"
308.928cm
Length without gun, with fenders 270.5"
687.1cm
Gun overhang rearward in travel lock 3.125"
7.938cm
Width 143"
363cm
Tread 115.0"
292.1cm
Ground clearance 15.25"
38.74cm
Fire height ~79"
~200cm
Turret ring diameter 85.0"
216cm
Ground pressure, zero penetration 12.24psi
.8592kg/cm²
M67A1: Armament
Type Mount Ammunition Traverse Max traverse rate Elevation
Flame Thrower M7A1-6 Flame Thrower Tank Turret M1 380gal initial fill using pressure in clean container
1430L initial fill using pressure in clean container
360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
.50cal M2HB MG Cupola M1 on turret -- 360°
(manual)
-- +60° to -10°
(manual)
.30cal M73 MG Coaxial to flame gun 3500 rounds 360°
(manual and hydraulic)
24°/sec +45° to -12°
(manual and hydraulic)
Night vision
Infrared periscope M24 for driver
M67A1: 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°
M67A1: Automotive
Engine Continental AVI-1790-8; 12 cylinder, 4 cycle, 90° vee, fuel-injected gasoline
Horsepower Net: 690@2800rpm
Gross: 825@2800rpm
Torque Net: 1470 ft-lb@2200rpm
Gross: 1670@2200rpm
Fuel capacity 335gal
1270L
Transmission General Motors CD-850-5, 2 ranges forward, 1 reverse
Steering Mechanical, steering wheel
Brakes Multiple disc
M67A1: Suspension
Type Road wheels Track return rollers
Torsion bar 6 independently sprung dual/track 3 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
M67A1: 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
M67A1: Performance
Min turning diameter Pivot

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. The pressure system used nine containers to store 10ft³ (.3m³) of air pressurized to 3,000psi (210kg/cm²). After the main fuel load was expended, the final pressure was around 600psi (42kg/cm²). The operating pressure in the main fuel container was 255-280psi (17.9-19.7kg/cm²). When fitted with a ⅞" (2.22cm) nozzle, the fuel discharge rate was 5.7gal/sec (22L/sec), yielding a firing time of 60 seconds; with a ¾" (1.9cm) nozzle, the discharge rate was 4.9gal/sec (19L/sec) for a firing time of 70 seconds. The secondary fuel system operated at the same pressure as the main fuel container, and had a 10.2gal (38.6L) tank which was drained at 300mL/sec. The atomizers were fed by the secondary fuel system at a rate of 1.5-3mL/sec. The M67A1 was the only version used by the Army.

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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)
-- +60° to -10°
(manual)
--
.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 Research & 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.
  4. TM 3-1040-206-30 Field Maintenance Third Echelon Flame Thrower, Mechanized, Main Armament, Turret Mounted, M7A1-6. Washington, DC: Headquarters, Department of the Army, 13 November 1959.

Last updated 3 Sep 2021.
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