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Heavy Expanded Mobility Tactical Truck (HEMTT) series are a range of 8x8 diesel powered off-road capable trucks, used by the US military. Formally described as "Truck, Cargo: 10-Ton, 8x8", it has been nicknamed the "Dragon Wagon". HEMTT trucks first went into service with the U.S. Army in 1982, as a replacement for the M520 Goer.
A 10x10 variant of the HEMTT truck is used as prime mover in the Palletized Load System (PLS). The vehicle is produced by the Oshkosh Truck Corporation. In the civilian realm the truck's chassis is also used in airport firefighting vehicles.
The HEMTT's objective is to provide heavy transport capabilities for supply and re-supply of combat vehicles and weapons systems, for the United States Army and Marine Corps. It is distinguished by extreme mobility compared to standard 5-ton trucks, thanks to its large number of wheels, combined with all-wheel drive and very large, low-pressure tires. Though far less publicized than the Humvee, it has been extremely important in transporting logistics behind quick-moving forces based on the M1 Abrams tank. Having proved itself as a key workhorse of the US heavy tactical wheeled vehicle fleet, about 13,000 HEMTT vehicles are in service today.
HEMTT trucks exist in several configurations:
M977 and M985 cargo trucks carry all types of equipment, especially ammunition. A crane is mounted at the rear of the vehicle.
M978 tanker refuels tactical vehicles and helicopters in forward locations.
M983 tractor tows the trailer-mounted MIM-104 Patriot missile systems.
M983 with 30 KW generator and a crane mounted behind the cab towed the MGM-31 Pershing Erector Laucher in CONUS (a MAN tractor was used in West Germany).
M984 recovery vehicle uses a lift-and-tow system to recover disabled vehicles in two-to-three minutes. It mounts a recovery winch, a crane and a large storage box.
The cost of a 'plain' HEMTT (M977 or M985) begins at approximately $135,000.
The latest model, the HEMTT A3, features independent suspension and a hybrid drive system (see Petroleum electric hybrid vehicle).
HEMTT 제원
Length: 33.4 ft (10.2 m) M977, M978, M985, 32.8 ft (10.0 m) M984, 29.2 ft (8.9 m) M983
Width: 8.5 ft (2.6 m)
Height: 7.8 ft (2.4 m)
Weight: 31 tons (M977, M978, M983), 34 tons (M985), 49 tons (M984)
Speed: 55 mph (89 km/h)
Range: 300 miles (480 km)
Fording Depth: 5.4 ft (1.6 m)
Crew: 2
The Oshkosh HEMTT A3 is at the forefront of a new generation of severe-duty vehicles. The A3 features revolutionary ProPulse® diesel-electric drive technology that improves fuel efficiency by at least 20% over current HEMTT models. And the onb oard generator can deliver more than 100KW of military-grade AC power for external operations. This advanced vehicle can climb a 60 percent grade, thunder across the most challenging terrain and achieve 65 mph on secondary roads. In short, the A3 allows fuel, equipment and supplies to keep pace with forward units to ensure you arrive first in every situation
HEMTT A3 제원
Engine: 400 HP Cummins ISL Diesel
Generator: Marathon 305KW (200KW exportable power)
Energy Storage: 1.5 MJ Ultra-capacitors
Drive Motors: Moog ? 460 VAC
Frame: Rectangular Tube
Suspension: Oshkosh TAK-4/Variable Height
Axle Gearing: 2-speed Gearing with Planetary Wheel Ends
Brakes: Air Disc with ABS
Wheels: Aluminum
Tire: 395/85R20 XZL Michelin with CTIS
In additions the HEMTT A3 has enhanced the HEMTT Performance with regard to: - 16 inches shorter length
- 3,000 lbs. lighter
- More stable/maneuverable
- 11 inches lower payload CG
- 40% roomier cab
- 20% better fuel economy
- Improved crew comfort
- Improved crew safety
- Modular design
- Reduced logistics footprint
Built to stand up to the evolving challenges in the field, the HEMTT A4 hits the battlefield with significant improvements and advancements in power, maintenance, and soldier safety. With a new 500 hp engine the next-generation HEMTT is faster and stronger than ever. Major changes and additions to the cab allow for greater soldier comfort and superior safety with the most up-to-date integrated attachments for armor and under-cab protection. The climate is always changing. So should the vehicles that are depended on to move troops and supplies where the mission demands. Ensure mission success with the HEMTT A4 family of vehicles.
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