Combat vehicles / Engineer / TMM
TMM
General Facts
- TYPE
Vehicle launched bridge - ORIGIN
USSR - NICKNAMES
TMM / Tyazhelyy Mekhanizirovannyy Most, heavy mechanized bridge
SMG / Schwere Mechanische Begletbrucke (TMM-3 in East German service) - DESIGNED
Mid 1950's - DESIGNER
Unknown - PRODUCTION
Late 1950's - 1960's (TMM)
1970's -1980's (TMM-3) - PRODUCERS
USSR - QUANTITY
Unknown - UNIT COST
Unknown - CHARACTERISTICS
Low cost design
High capacity bridge
Bridge sections have a limited length
Introduction
The TMM is a Cold War era vehicle launched bridge of Soviet origin. It was developed to allow Soviet forces to traverse small gaps and water and gaps that are wider than a single bridge but do not require a pontoon. The name TMM stands for Tyazhelo Mekhniznrovanny Most , which is Russian for heavy mechanized bridge. The TMM remains in use, but has been replaced in production by the larger and more capable TMM-6.
Layout
The TMM is a bridge system that is based on the KrAZ-214 6x6 7t truck. The improved TMM-3 uses the later KrAZ-255B 7.5t truck chassis and launches the same bridge. A 10.5 m folded scissor bridge is carried at the rear of a vehicle. The bridge is launched rearwards using a pivoting metal frame and a series of steel wire and winches connected to the engine. The bridge rests on the river floor by means of two variable length struts.
Bridge capabilities
A single bridge section has a length of 10.5 meters and an infinite number can be connected. Normally four TMM vehicles form a unit and together are able span a 40 meter gap. The bridge sections can be laid in gaps and water between 1.7 and 3.2 meters deep. The bridge has a 50 t weight capacity and the roadway allows for vehicles ranging from small cars to tanks. The TMM-4 variant uses a 60 t weight capacity bridge.
Users
The TMM was produced in large quantities and was acquired by the USSR, most Warsaw Pact nations and many nations receiving Soviet aid. Despite its age the TMM remains in service although it is no longer produced.
TMM
The TMM is a bridge laying vehicle that carries a single scissor bridge. There are no transloading vehicles. Each section is carried on its own TMM vehicle. The original TMM is based on the KrAZ-214 or ZIL-157 truck. The TMM was supplemented by the improved TMM-3, which is based on the newer KrAZ-255B truck chassis. The TMM-3 can be distinct from the TMM by its spare tire carried on the roof of the cab and its associated steel frame.
Overview of TMM models:
TMM-1: 50 ton scissor bridge on ZIL-157 chassis. Also known as TMM without suffix.
TMM-2: 50 ton scissor bridge on KrAZ-214 chassis. Also known as TMM without suffix.
TMM-3: 50 ton scissor bridge on KrAZ-255B chassis. Can be identified by steel frame with spare wheel above cab.
TMM-4: 60 ton scissor bridge with stronger jacks on KrAZ-255B or KrAZ-260 chassis. In KrAZ-260 version spare wheel is located behind cab.
Type | Vehicle launched bridge |
---|---|
Crew | 1 + 2 (driver, 2 passengers) |
Length | 9.3 m with bridge |
Width | 3.2 m with bridge |
Height | 3.15 m |
Ground clearance | 0.36 m |
Weight | 19.5 t with bridge |
Ground pressure | ? |
Wheelbase | Wheeled chassis, 6x6, 4.6 + 1.4 m wheelbase, 15.00 x 20 tires |
Turn radius | ? |
Engine | YaMZ M206B V6 diesel, 205 hp at 2.000 rpm |
Power ratio | 10.5 hp/t |
---|---|
Transmission | Manual, 5 forward, 1 reverse |
Speed | 55 km/h road |
Fuel | 450 L |
Range | 530 km |
Wall | ? |
Trench | ? |
Gradient | ? |
Fording | ? |
Armor | No |
NBC equipment | No |
Night vision | No |
---|---|
Smoke | No |
Remarks | Carries and launches single section of 10.5 meter 60 t scissor bridge |
Armament | - |
Weapon1 | - |
Weapon2 | - |
Weapon3 | - |
Weapon4 | - |
Weapon5 | - |
Weapon6 | - |
Type | Vehicle launched bridge |
---|---|
Crew | 1 + 2 (driver, 2 passengers) |
Length | 9.3 m with bridge |
Width | 3.2 m with bridge |
Height | 3.4 m |
Ground clearance | 0.36 m |
Weight | 19.9 t with bridge |
Ground pressure | ? |
Wheelbase | Wheeled chassis, 6x6, 4.6 + 1.4 m wheelbase |
Turn radius | 13 m |
Engine | YaMZ-238 V8 diesel, 240 hp at 2.100 rpm |
Power ratio | 12.1 hp/t |
---|---|
Transmission | Manual, 5 forward, 1 reverse |
Speed | 60 km/h |
Fuel | 330 L |
Range | 490 km |
Wall | 0.6 m |
Trench | 0.7 m |
Gradient | 57% gradient |
Fording | 1 m |
Armor | No |
NBC equipment | No |
Night vision | No |
---|---|
Smoke | No |
Remarks | Carries and launches single section of 10.5 meter 60 t scissor bridge |
Armament | - |
Weapon1 | - |
Weapon2 | - |
Weapon3 | - |
Weapon4 | - |
Weapon5 | - |
Weapon6 | - |