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Ml078 Family of Medium

Tactical VehiclesThe Family of Medium Tactical Vehicles (FMTV) is a series of 4 X 4 (Light Medium Tactical Vehicle/LMTV) and 6 x 6 (Medium TacticaVehicle/MTV) trucks developed to replace aging 21/2-ton ("deuce-and-a-half") and 5-ton trucks. To reduce costs and speed up acquisition, bidder

were required to use as many commercially available components as possible. The vehicle needed to show good cross-country and adverse weathemobility, to share at least 75% ofits components among variants, to be operated by both large male and small female drivers, and to be easilymaintained and repaired. The basis of Stewart & Stevenson's winning entry is the Austrian Steyr-Daimler- Puch 12M21 4 X 4 already in service in

the Austrian Army. Given the extensive truck-building experience of its two competitors, the choice of Stewart & Stevenson surprised manyobservers. The size of the program was much larger than any other single effort the company had undertaken before. Stewart & Stevenson officials

noted in rebuttal that the company has built many types of specialized vehicles and that the baseline FMTV truck was already in service. In adaptingthe 12 M 21, Stewart & Stevenson sharply reduced the foreign content in the design by using US components, including the Allison MD-D7 seven-

speed automatic transmission with integral transfer case in place of the ninespeed manual used by Austrian trucks. The cab is designed to take threepassengers. It has power-assist steering, fore and aft adjustable seat, tilt and telescoping steering wheel, and a Central Tire Inflation System (CTIS)which can remotely adjust tire pressure to one of five settings according to road conditions. A 12.7-mm machine-gun mount is fitted to the reinforcedcab roof. Some variants can be delivered to a landing area using the Low-Altitude Parachute Extraction System/Airdrop (LAPES/AD).

VARIANTS LMTV4 X 4 types include the M1078 cargo, M1079 van, M1081 LAPES -capable cargo, and M1080 chassis for other bodies. FMTV6 X 6 types include the M1083 cargo, M1084 cargo with crane, M1085 long-bed cargo, M1086 long-bed cargo with crane, M1087 expansible vanM1088 tractor, M1089 wrecker, M1090 dump truck, M1091 fuel tanker, M1092 chassis, M1093 cargo-LAPES/AD, and M1094 dump-LAPES/AD.

DEVELOPMENT The FMTV program began in 1987 with prototype contracts awarded in October 1988 to BMY Tactical Truck Corp. ofMarysville, Ohio, Stewart & Stevenson of Sealy, Texas, and Teledyne Continental Motors of Muskegon, Michigan. Stewart & Stevenson won thecompetition in October 1991, with the First Unit Equipped (FUE) in 1993. Program goals originally set at 112,000 MTVs procured over a 30-year

period. A June 1991 decision scaled the plan down to 89,000 trucks, with first five-year plan reduced from 19,000 to 14,000 and later to 11,000

trucks.

SPECIFICATIONS CREW 3

PAYLOAD 4x4, 5,000 Ib (2,268 kg); 6 X 6 , 10,000 Ib (4,536 kg)DIMENSIONS

overall length

LMTV: 21 ft 2 in to 21 ft 11 in (6.461-6.682 m) MTV: 22 ft 10 in (6.961m) (M1093) to 31 ft 9 in (9.689 m) (M1086) width 8 ft (2.44 m)height, max to top of cab

9 ft 1 in (2.76 m) wheelbase 4 X 4: 12 ft 9J/2 in (3.9 m) 6x6: ranges from 13 ft 5 in (4.10m) (M1083, M1090, M1093) to 18 ft Vz in (5.5 m) (M1086)ground clearance

22 in (559 mm)ANTIAIRCRAFT ARMAMENT 12.7-mm machinegun mount over cabGROUND COMBAT VEHICLES 225

POWERPLANT Caterpillar 3116 ATAAC 225-hp (LMTV), 290-hp (MTV) liquid cooled turbocharged after cooled inline 6-cylinder diese

engine, Allison MD-D7 automatic transmission with 7 forward/1 reverse gearspower-to-weight ratio18.9-23.7 hp/metric ton

SUSPENSION (EACH SIDE)

front: longitudinal leaf with shock absorbers

rear: longitudinal leaf with shocks

(LMTV), bogie with leaf spring over walking beam (MTV)

SPEED 55 mph (88 km/h), range more than 400 mi (644 km) (LMTV), more than 300 mi (483 km) (MTV)

OBSTACLE CLEARANCE approach angle 40, departure angle 40 (LMTV), 63 (basic MTV), gradient 60%, side

slope 30%, fording basic 3 ft (0.91m), with preparation 5 ft (1.52 m)

http://www.globalsecurity.org/military/systems/ground/fmtv-lsac.htm

http://www.defenseindustrydaily.com/FMTV-2010-2015-Oshkosh-Wins-The-Re-Compete-05744/

http://www.globalsecurity.org/military/systems/ground/fmtv-lsac.htmhttp://www.globalsecurity.org/military/systems/ground/fmtv-lsac.htmhttp://www.defenseindustrydaily.com/FMTV-2010-2015-Oshkosh-Wins-The-Re-Compete-05744/http://www.defenseindustrydaily.com/FMTV-2010-2015-Oshkosh-Wins-The-Re-Compete-05744/http://www.defenseindustrydaily.com/FMTV-2010-2015-Oshkosh-Wins-The-Re-Compete-05744/http://www.globalsecurity.org/military/systems/ground/fmtv-lsac.htm

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