M67: General | |||
Date of first acceptance | 1955 | Total acceptances | 74 | Manufacturer | Chrysler Corp. | Crew |
|
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" 38.74cm |
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 1,380L 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 | 3,500 rounds | 360° (manual and hydraulic) |
24°/sec | +45° to -12° (manual and hydraulic) |
|
Aiming equipment | ||||||
Periscope sight M21 for gunner and periscope sight M28 for commander | ||||||
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 |
0° |
Rear sides | 2.0" equivalent 5.1cm equivalent |
0° |
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 |
0° |
Sides | 3.0" equivalent 7.6cm equivalent |
0° |
Rear | 2.0" equivalent 5.1cm equivalent |
0° |
Top | 1.0" 2.5cm |
90° |
M67: Automotive | |||||
Engine | Continental AV-1790-7C; 12 cylinder, 4 cycle, 90° vee gasoline | ||||
Horsepower | Net: 690@2,800rpm Gross: 810@2,800rpm |
Torque | Net: 1,410 ft-lb@2,200rpm Gross: 1,610@2,200rpm |
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 |
Angle of approach | 36° | Angle of departure | 31° |
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.
M67A1: General | |||
Date of first acceptance | 1955 | Total acceptances | 35 | Manufacturer | Chrysler Corp. | Crew |
|
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 | .625" 1.59cm |
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 | 12.0psi .843kg/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 1,430L 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 | 600 rounds | 360° (manual) |
-- | +60° to -10° (manual) |
|
.30cal M73 MG | Coaxial to flame gun | 3,500 rounds | 360° (manual and hydraulic) |
24°/sec | +45° to -12° (manual and hydraulic) |
|
Aiming equipment | ||||||
Periscope sight XM30 for gunner and periscope M28C for commander | ||||||
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 |
0° |
Rear sides | 2.0" equivalent 5.1cm equivalent |
0° |
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 |
0° |
Sides | 3.0" equivalent 7.6cm equivalent |
0° |
Rear | 2.0" equivalent 5.1cm equivalent |
0° |
Top | 1.0" 2.5cm |
90° |
M67A1: Automotive | |||||
Engine | Continental AVI-1790-8; 12 cylinder, 4 cycle, 90° vee, fuel-injected gasoline | ||||
Horsepower | Gross: 810@2,800rpm | Torque | Gross: 1,610@2,200rpm | Fuel capacity | 335gal 1,270L |
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 | |||
Max level road speed | 31.8mph 51.2kph |
Max trench | 102" 259cm |
Max grade | 60% | Max vertical obstacle | 36" 91cm |
Angle of approach | 36° | Angle of departure | 31° |
Min turning diameter | Pivot | Max fording depth | 48" 120cm |
Cruising range | ~160mi ~260km |
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.
M67A2: General | |||
Date of first acceptance | 1962 | Total acceptances | 108 |
Manufacturers |
|
Crew |
|
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 1,380L 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 | 3,500 rounds | 360° (manual and hydraulic) |
24°/sec | +45° to -12° (manual and hydraulic) |
4°/sec |
Aiming equipment | ||||||
Periscope M30C for gunner and periscope M28C for commander | ||||||
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 |
0° |
Rear sides | 2.0" equivalent 5.1cm equivalent |
0° |
Exhaust grille | 1.0" equivalent 2.5cm equivalent |
0° |
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 |
0° |
Sides | 3.0" equivalent 7.6cm equivalent |
0° |
Rear | 2.0" equivalent 5.1cm equivalent |
0° |
Top | 1.0" 2.5cm |
90° |
M67A2: Automotive | |||||
Engine | Continental AVDS-1790-2A; 12 cylinder, 4 cycle, 90° vee, supercharged diesel | ||||
Horsepower | Net: 643@2,400rpm Gross: 750@2,400rpm |
Torque | Net: 1,575 ft-lb@1,750rpm Gross: 1,710@1,800rpm |
Fuel capacity | 385gal 1,460L |
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.