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LVT(A)4
LVT(A)5


Landing Vehicle, Tracked (Armored), Mark 41-5
LVT(A)4: General
Date of first acceptance March 1944 Total acceptances 1890
Manufacturer Food Machinery Corp. Crew
6 men:
  • Commander in turret right rear
  • Gunner in turret right front
  • Loader in turret left
  • Assistant loader in hull left
  • Driver in hull left front
  • Assistant driver in hull left front
LVT(A)4: Dimensions
Combat weight ~40,000lbs
~18,000kg
Height 122.5"
311.2cm
Length 313"
795cm
Howitzer overhang forward 0"
Width 128"
325cm
Tread 113.5"
288.3cm
Ground clearance, hard surface 18"
46cm
Fire height 109"
277cm
Turret ring diameter 54.4"
138cm
Ground pressure, zero penetration 11.1psi
.779kg/cm²
LVT(A)4: Armament
Type Mount Ammunition Traverse Elevation
75mm Howitzer M3 M7 in turret 100 rounds 360°
(manual)
+40° to -20°
(manual)
.50cal M2HB MG
(early models)
Ring mount on turret rear 400 rounds 360°
(manual)
Manual
Two .30cal M1919A4 MG
(late models)
Mount on either side of turret 6000 rounds 360°
(manual)
Manual
.30cal M1919A4 MG
(late models)
Cab right bow mount Manual Manual
LVT(A)4: Armor
Assembly
Welding
Hull
Rolled homogeneous steel
Location Thickness Angle from vertical
Upper front (cab) .5"
1.3cm
30°
Middle front .25"
.64cm
83°
Lower front .25"
.64cm
35° to 90°
Sides .25"
.64cm
Pontoons 12-gauge mild steel
Upper rear .25"
.64cm
Lower rear .25"
.64cm
60°
Top .25"
.64cm
90°
Floor 10-gauge mild steel 90°
Turret
Rolled homogeneous steel
Location Thickness Angle from vertical
Gun shield (cast) 1.5"
3.8cm
0° to 60°
Front 1.0"
2.5cm
0° to 63°
Sides 1.0"
2.5cm
20°
Rear 1.0"
2.5cm
Top Open
LVT(A)4: Automotive
Engine Continental W-670-9A; 7 cylinder, 4 cycle, radial gasoline
Horsepower Net: 250@2400rpm
Gross: 262@2400rpm
Torque Net: 584 ft-lb@1800rpm
Gross: 590 ft-lb@1700rpm
Fuel capacity 106gal
401L
Transmission Synchromesh, 5 speeds forward, 1 reverse
Steering Controlled differential, steering levers
Brakes Mechanical, external contracting
LVT(A)4: Suspension
Type Road wheels Track return rollers
Torsilastic 11 independently sprung/track 2/track
Drive sprockets Idlers Shock absorbers
37-alternate-engaged-tooth front drive 33-tooth adjustable sprocket at rear of track None
LVT(A)4: Track
Outside guide, dry pin, steel link, extruded grousers
Width 14.25"
36.20cm
Pitch 8"
20cm
Shoes/track 73 Ground contact length 126.5"
cm
LVT(A)4: Performance
Max level road speed 25mph
40kph
Max water speed 7mph
11kph
Max trench 60"
150cm
Min turning diameter 30', land
48', water
9m, land
15m, water
Max vertical obstacle 36"
91cm
Max grade 60%
Angle of approach 35° Angle of departure 30°
Max fording depth Floats Cruising range ~125mi, roads
~75mi, water
~201km, roads
~120km, water


LVT(A)4 was based on LVT(A)1, but with a new turret mounting a 75mm howitzer. Both early and late armored cabs were fitted to LVT(A)4. In later vehicles, the ring-mounted .50cal MG was replaced by a mount for a .30cal MG on either side of the rear of the turret. Late-production turrets had vision blocks installed in their rears and sides.

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Landing Vehicle, Tracked (Armored), Mark 51-6
LVT(A)5: General
Date of first acceptance April 1945 Total acceptances 269
Manufacturer Food Machinery Corp. Crew
6 men:
  • Commander in turret right rear
  • Gunner in turret right front
  • Loader in turret left
  • Assistant loader in hull left
  • Driver in hull left front
  • Assistant driver in hull left front
LVT(A)5: Dimensions
Combat weight ~40,000lbs
~18,000kg
Height 122.5"
311.2cm
Length 313"
795cm
Howitzer overhang forward 0"
Width 128"
325cm
Tread 113.5"
288.3cm
Ground clearance, hard surface 18"
46cm
Fire height 109"
277cm
Turret ring diameter 54.4"
138cm
Ground pressure, zero penetration 11.1psi
.779kg/cm²
LVT(A)5: Armament
Type Mount Ammunition Traverse Max traverse rate Elevation
75mm Howitzer M3 M12 in turret 100 rounds 360°
(manual and hydraulic)
24°/sec +40° to -20°
(manual)
Two .30cal M1919A4 MG Mount on either side of turret 6000 rounds 360°
(manual)
-- Manual
.30cal M1919A4 MG Cab right bow mount Manual -- Manual
Stabilizer
Elevation only
LVT(A)5: Armor
Assembly
Welding
Hull
Rolled homogeneous steel
Location Thickness Angle from vertical
Upper front (cab) .5"
1.3cm
30°
Middle front .25"
.64cm
83°
Lower front .25"
.64cm
35° to 90°
Sides .25"
.64cm
Pontoons 12-gauge mild steel
Upper rear .25"
.64cm
Lower rear .25"
.64cm
60°
Top .25"
.64cm
90°
Floor 10-gauge mild steel 90°
Turret
Rolled homogeneous steel
Location Thickness Angle from vertical
Gun shield (cast) 1.5"
3.8cm
0° to 60°
Front 1.0"
2.5cm
0° to 63°
Sides 1.0"
2.5cm
20°
Rear 1.0"
2.5cm
Top Open
LVT(A)5: Automotive
Engine Continental W-670-9A; 7 cylinder, 4 cycle, radial gasoline
Horsepower Net: 250@2400rpm
Gross: 262@2400rpm
Torque Net: 584 ft-lb@1800rpm
Gross: 590 ft-lb@1700rpm
Fuel capacity 106gal
401L
Transmission Synchromesh, 5 speeds forward, 1 reverse
Steering Controlled differential, steering levers
Brakes Mechanical, external contracting
LVT(A)5: Suspension
Type Road wheels Track return rollers
Torsilastic 11 independently sprung/track 2/track
Drive sprockets Idlers Shock absorbers
37-alternate-engaged-tooth front drive 33-tooth adjustable sprocket at rear of track None
LVT(A)5: Track
Outside guide, dry pin, steel link, extruded grousers
Width 14.25"
36.20cm
Pitch 8"
20cm
Shoes/track 73 Ground contact length 126.5"
cm
LVT(A)5: Performance
Max level road speed 25mph
40kph
Max water speed 7mph
11kph
Max trench 60"
150cm
Min turning diameter 30', land
48', water
9m, land
15m, water
Max vertical obstacle 36"
91cm
Max grade 60%
Angle of approach 35° Angle of departure 30°
Max fording depth Floats Cruising range ~125mi, roads
~75mi, water
~201km, roads
~120km, water


LVT(A)4 was fitted with a power traverse mechanism and elevation stabilizer and was then designated LVT(A)5. A second auxiliary generator was added to compensate for the increased demand for power. LVT(A)5 did not see service in the Second World War, and late in its life an armored cover was added to the turret.

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References

  1. Hunnicutt, R.P. Stuart: A History of the American Light Tank, volume 1. Navato, CA: Presidio Press, 1992.
    Reprinted with permission from Stuart, R.P. Hunnicutt ©1992, available from Presidio Press, 505B San Martin Drive, Suite 160, Navato, CA 94945.

  2. Research, Investigation and Experimentation in the Field of Amphibian Vehicles. Kalamazoo, MI: Ingersoll Kalamazoo Division, Borg-Warner Corp., Dec 1957.

  3. Chamberlain, Peter, and Chris Ellis. British and American Tanks of World War Two. Frome, England: Cassell & Co., 2000.

  4. Crismon, Fred W. U.S. Military Tracked Vehicles. Osceola, WI: Motorbooks International, 1992.

  5. Siemers, Cary. "USA's Landing Vehicle Tracked." World War II Tanks & Vehicles and Advanced Squad Leader. 25 Nov 2000. 16 Jan 2001 <http://www.shadowsfolly.com/WWII/USA/LandingVehicleTracked.htm>.

  6. FM 17-34 Amphibious Tank and Tractor Battalions. Washington, D.C.: Dept. of the Army, 1 Jun 1950.



Last updated 23 Jan 2014.

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