Regan Brown
The Heavy Expanded Mobility Tactical Truck (HEMTT) is an 8x8 diesel off-road tactical truck used by the US Army. Introduced in 1985, the HEMTT is the backbone of the US Army's logistics fleet. The HEMTT has a huge payload capacity and off-road capabilities, making it a key logistics player. The HEMTT M978A2 and M978A4 are fuel servicing truck variants with a 9,500-liter (2,500 US gal) capacity. The HEMTT Tanker Aviation Refueling System (HTARS) is used to distribute and control fuel flow from the HEMTT tanker to the aircraft being refueled. The M977 Heavy Expanded Mobility Tactical Truck (HEMTT) series of vehicles consists of a number of different models, all built on similar chassis but specially equipped to perform different missions. The normal operating range of all models is 300 miles (483 km), based on 154 gallons (583 liters) of fuel.
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What You'll Learn
The M978A4 HEMTT holds 9,500 litres of fuel
The M978A4 Heavy Expanded Mobility Tactical Truck (HEMTT) holds 9,500 litres of fuel. This is equivalent to 2,500 US gallons.
The M978A4 is a fuel servicing truck variant of the HEMTT, which was introduced in 1985 and is used by the US Army. The HEMTT is an 8 x 8 diesel off-road tactical truck, nicknamed the "Dragon Wagon". The HEMTT's key mission is to offer heavy transport capabilities for the resupply of combat vehicles and weapon systems. The huge payload capacity and off-road capabilities make it a key logistics player and the backbone of the US Army's logistics fleet.
The M978A4 is the current model of the M978 HEMTT, which is a 9,500-litre capacity tanker. The M978A0 was produced in potable water and fuel servicing truck variants, while the A2 and A4 models have only been produced in the fuel servicing truck variant.
The HEMTT Tanker Aviation Refuelling System (HTARS) is used to distribute and control fuel flow from the HEMTT tanker to the aircraft being refuelled. The system consists of tees, elbows, adapters, lightweight hoses, and nozzles required to set up a four-station aircraft refuelling system. There are two models of the HTARS: HTARS100 and HTARS101. The fuel required to operate the HTARS is supplied by the HEMTT tanker and distributed through a 3-inch supply hose to the network of 2-inch hoses, tees and elbows that make up the four refuelling points.
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The M978A2 HEMTT holds 2,500 gallons of fuel
The M978A2 Heavy Expanded Mobility Tactical Truck (HEMTT) holds 2,500 gallons of fuel. This is a significant amount of fuel, and the HEMTT is used by the US Army for heavy transport capabilities for the resupply of combat vehicles and weapon systems.
The HEMTT is an 8 x 8 diesel off-road tactical truck, nicknamed the Dragon Wagon, and it first went into service with the US Army in 1985. The HEMTT is part of Oshkosh's Family of Heavy Tactical Vehicles (FHTV), which also includes the Palletised Load System (PLS) and the Heavy Equipment Transporter (HET).
The HEMTT has a range of variants, including cargo trucks, a fuel servicing truck, tractor variants, a load handling system variant, a common bridge transporter variant, and a recovery vehicle with cranes and winches. The M978A2 is the fuel servicing truck variant, and it has a capacity of 2,500 gallons of fuel.
The HEMTT is a key logistics player for the US Army due to its huge payload capacity and off-road capabilities. The normal operating range of all HEMTT models is 300 miles (483 km), based on 154 gallons (583 litres) of fuel and a 100,000-pound (45,400 kg) GCWR, travelling over mixed terrain.
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The M977 HEMTT series has a normal operating range of 300 miles
The M977 Heavy Expanded Mobility Tactical Truck (HEMTT) is a series of vehicles that perform different missions, including cargo transport, fuel servicing, and recovery operations. Introduced in 1985, the HEMTT has become the backbone of the US Army's logistics fleet, offering heavy transport capabilities for resupply missions.
The M977 series includes the M977A0/A2/A4 cargo truck, which can be fitted with a light-duty Grove materials handling crane at the rear of the chassis. The M977A0/A2/A4 Electrical Power Plant (EPP) variant has an extended cargo body and is used to transport generators for the Patriot air defence missile system. The M977A2 Large Repair Parts Transporter (LRPT) is also fitted with a crane and is used to transport large repair parts.
The HEMTT family also includes the M978 fuel servicing truck, with a capacity of 9,500 litres (2,500 US gallons). The M978A0 model was produced in both potable water and fuel servicing truck variants, while the A2 and A4 models are exclusively fuel servicing trucks. The HEMTT Tanker Aviation Refuelling System (HTARS) is used to distribute and control fuel flow from the HEMTT tanker to aircraft, with two models available: HTARS100 and HTARS101.
The HEMTT's diesel-electric drive system, known as ProPulse, can increase fuel economy by up to 40% compared to conventional powertrains. This technology optimises engine speed based on power demand and eliminates transient loads, resulting in reduced emissions and improved fuel efficiency.
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The M977 HEMTT holds 154 gallons of fuel
The M977 Heavy Expanded Mobility Tactical Truck (HEMTT) is an 8x8 diesel-powered off-road capable all-weather truck used by the US military. It can hold 154 gallons of fuel, and its normal operating range is 300 miles (483 km) when travelling over mixed terrain.
The M977 is the base member of the HEMTT family, which consists of a number of different models built on similar chassis but specially equipped to perform different missions. The M977A0/A2/A4 cargo truck is used to carry equipment, mainly ammunition, and can be fitted with a light-duty Grove materials handling crane mounted at the rear of the chassis.
The M977 HEMTT features a two-door forward-control cab that seats two. It is made of heavy-duty welded steel with corrosion-resistant sheet metal skins. The cab has been modified to accommodate a turret and lightbars, and the fuel tank and chassis batteries have been lowered slightly to allow room for the crew cab.
The HEMTT was introduced in 1985 and is considered the backbone of the US Army's logistics fleet. It is part of Oshkosh's Family of Heavy Tactical Vehicles (FHTV), which also includes the Palletised Load System (PLS) and the Heavy Equipment Transporter (HET). Oshkosh has recapitalised thousands of HEMTTs since the 1990s and continues to supply new and updated vehicles to the US Army.
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The M978A2R1 HEMTT Tanker Aviation Refuelling System controls fuel flow to aircraft
The M978A2R1 HEMTT Tanker Aviation Refuelling System is a lightweight, rapidly assembled four-point aircraft hot refuelling system. The M978A2 HEMTT has a 9,500-litre (2,500 US gal) capacity, and the M978A4 HEMTT has the same capacity with an additional M989 HEMAT trailer. The M978A2R1 HEMTT Tanker Aviation Refuelling System controls fuel flow to aircraft by using the HTAR system, which consists of one 3-inch by 50-foot and ten 2-inch by 50-foot discharge hoses, four nozzles, four CCRs, four D-1s, and four overwing and recirculation nozzles. The system is designed to be a lightweight, rapidly assembled four-point aircraft hot refuelling system. The couplings are unisex, dry-beak couplings designed to prevent fuel from flowing if the connections are not made properly. The M978A2R1 HEMTT Tanker Aviation Refuelling System is used to refuel aircraft, transport bulk fuels, and service combat vehicles. It has a stainless steel 2,500-gallon tank with a single-compartment shell. The fuel system includes a pump and a filter/separator. The M978 HEMTT is equipped with a fuel safety device (deadman control) and a D-1 nozzle. To start the flow of fuel to the nozzle, squeeze the deadman control. The flow is stopped by releasing the pressure on the deadman control.
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Frequently asked questions
The M977 Heavy Expanded Mobility Tactical Truck (HEMTT) series of vehicles consists of a number of different models, with varying fuel capacities. The M977 A2 model has a fuel capacity of 154 gallons (583 litres) and a normal operating range of 300 miles (483 km). The M978 model has a capacity of 9,500 litres (2,500 US gallons).
The HEMTT is an 8 x 8 diesel off-road tactical truck used by the US Army. It is used to carry out line and local haul, unit resupply, and related missions in a tactical environment. It is also used to transport large repair parts and carry equipment, mainly ammunition.
HEMTT stands for Heavy Expanded Mobility Tactical Truck.
