CTM-3TBD1-4

CTM-3TBD: General
Date of first acceptance 1941 Total acceptances 5
Manufacturer Marmon-Herrington Co. Crew 3 men
CTM-3TBD: Dimensions
Combat weight 20,800lbs
9430kg
CTM-3TBD: Armament
Type Mount Traverse Elevation
Two .50cal MG Turret 360°
(manual)
Manual
Three .30cal MG Ball mounts in hull Manual Manual
CTM-3TBD: Armor
Maximum .5"
1.3cm
Minimum .4375"
1.111cm
CTM-3TBD: Automotive
Engine Hercules DXRB diesel
Horsepower 123
CTM-3TBD: Suspension
Type Road wheels Track return rollers
Vertical volute spring 2 bogies/track;
2 wheels/bogie
2/track
Drive sprockets Idlers Shock absorbers
14-tooth front drive Adjustable at rear of track None
CTM-3TBD: Track
T16E1
Outside guide, double pin, rubber bushed, reversible rubber
Width 11.6"
29.5cm
Pitch 5.5"
14cm
T16E2
Outside guide, double pin, rubber bushed, non-reversible rubber
Width 11.6"
29.5cm
Pitch 5.5"
14cm
CTM-3TBD: Performance
Max level road speed 30mph
50kph
Cruising range 125mi
201km

The five CTM-3TBDs accepted by the US Marine Corps essentially placed a turret onto the top of Marmon-Herrington's earlier light tank designs, using vertical volute spring suspension bogies similar to those found on Army light tanks and those tanks' tracks. For subsequent designs, the Corps asked for a turret with one gun instead of the CTM-3TBD's twin arrangement. The engine louvres were .25" (.64cm) thick.

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References

  1. Estes, Kenneth W. Marines Under Armor. Annapolis, MD: Naval Institute Press, 2000.
  2. Crismon, Fred W. U.S. Military Tracked Vehicles. Osceola, WI: Motorbooks International, 1992.
  3. Spoelstra, Hanno. "Marmon-Herrington Military Vehicles: Tanks." Marmon-Herrington Military Vehicles. 21 Feb 2020 <http://www.marmon-herrington.webs.com/tank.html>.
  4. Kirk, William. "U.S. Light Tanks." TANKS! 13 Feb 2003. 21 Feb 2020 <https://web.archive.org/web/20120212011858/http://mailer.fsu.edu/~akirk/tanks/UnitedStates/lighttanks/LightTanks.html>.

Last updated 21 Feb 2020.
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© Copyright 2020 Chris Conners