FV620 Stalwart High Mobility Load Carrier, Norfolk Tank Museum.
The Stalwart High Mobility Load Carrier (H.M.L.C) Amphibious Cargo Vehicle was developed by the Alvis Car and Engineering Company as a private venture. It entered service with the British Army in 1966. Its British Army designation is the FV620, in service it was nicknamed the 'Stolly'. The main function of the FV620 Stalwart was to supply forward units with fuel and ammunition, but as this was not an Armoured Vehicle, it offered very little protection. This Amphibious Cargo Vehicle has a payload capacity of 5 tons. In the Troop Carrier configuration it could carry 30 fully equipped Soldiers. The FV620 Stalwart could also tow trailers or Artillery Pieces with a maximum weight of 10 tons. The cargo area of the Stalwart has large drop-down panels with waterproof seals on either side and a drop-tailgate, this area could be covered with a canvas cover for weather protection. The cab of the Stalwart Amphibious Vehicle provides seating for the driver, plus two passengers, the driver being seated in the middle, unusually the cab is entered through the roof hatches.
The FV6 Stalwart is based on the FV603 Saracen 6x6 Armored Personnel Carrier chassis, a number of automotive components are interchangeable. Powered by a Rolls-Royce B-81 Mk.8B petrol engine, developing 220hp powering a full-time all-wheel drive system. The FV620 Stalwart has an impressive cross-country mobility, and is fully amphibious with minimal preparation. On water this cargo vehicle is propelled by two waterjets, giving a maximum amphibious speed on water was of nearly 7mph. It is worth mentioning that waterjet units of the Stalwart were complex and troublesome to maintain, and was common to remove them when amphibious qualities were unnecessary, to simplify maintenance.
Production of the Alvis Stalwart ended a long time ago, then it was also withdrawn from the British Army service, it's Amphibious Transport role was taken over with the use of Utility Helicopters. Many of these Amphibious Carriers were sold to modern-day enthusiasts, many being converted to 'Amphibious Tour Vehicles'.
Variants:
▪︎FV622 Stalwart Mk.2 - General Service, it could carry up to 38 fully-equipped Troops. It could carry a field refueling pack, instead of the cargo. The Stalwart Mk.2 was fitted with improved waterjets. Its maximum speed on water was about 8mph.
▪︎FV623 Stalwart Mk.2 - Limber, artillery re-supply vehicle, fitted with a hydraulic crane in the cargo area, Engineering Vehicle, based on the Mk.2. It was also fitted with a crane.
General characteristics:
▪︎Place of Origin: United Kingdom
▪︎Manufacturer: Alvis Car and Engineering Company
▪︎Manufactured: 1963 to 1971
▪︎In Service: 1964 to 19893
▪︎Crew: Driver and up to two Personnel
▪︎Powerplant: Rolls-Royce B81 Mk.8B eight-cylinder water-cooled 6.5 L petrol engine, 220hp
▪︎Gearbox: Alvis 5 speed box
▪︎Transfer Box: Forward and reverse, giving 5 gears in both directions
▪︎Driveline: Non slip differential to bevel boxes, producing permanent 6 wheel drive
▪︎Length: 20ft 10in / Width: 8ft 7in / Height: 8ft 8in to load cover pole
▪︎Weight Empty: 8.500 long tons / Weight Fully Laden: 13.999 long tons
▪︎Suspension: Independent parallel wishbone links and torsion bars per wheel station
▪︎Armour: none - but hull protected crews from Anti-Tank Mines in Aden
▪︎Road Speed: 40 mph at 4000 rpm
▪︎Water Speed: 6 knots
▪︎Fording Depth Prepared: Amphibious to full flotation
▪︎Approach Angle Laden: 42 degrees / Departure Angle Laden: 29 degrees
▪︎Max Gradient: 21 degrees / Maximum Gradient Restart: 18 degrees
▪︎Side Overturn Angle: 31 degrees for FV620/FV622
▪︎Maximum Vertical Obstacle: 1ft 6in
▪︎Trench Crossing: 5ft
▪︎Ground Clearance: 1ft 4in laden FV622
▪︎Turning Circle = 1/R and L/H lock 49 to 59ft
▪︎Vehicle Range: 400 miles
▪︎Fuel Consumption: 4 mpg
Sourced from www.military-today.com/trucks/alvis_stalwart.htm
FV620 Stalwart High Mobility Load Carrier, Norfolk Tank Museum.
The Stalwart High Mobility Load Carrier (H.M.L.C) Amphibious Cargo Vehicle was developed by the Alvis Car and Engineering Company as a private venture. It entered service with the British Army in 1966. Its British Army designation is the FV620, in service it was nicknamed the 'Stolly'. The main function of the FV620 Stalwart was to supply forward units with fuel and ammunition, but as this was not an Armoured Vehicle, it offered very little protection. This Amphibious Cargo Vehicle has a payload capacity of 5 tons. In the Troop Carrier configuration it could carry 30 fully equipped Soldiers. The FV620 Stalwart could also tow trailers or Artillery Pieces with a maximum weight of 10 tons. The cargo area of the Stalwart has large drop-down panels with waterproof seals on either side and a drop-tailgate, this area could be covered with a canvas cover for weather protection. The cab of the Stalwart Amphibious Vehicle provides seating for the driver, plus two passengers, the driver being seated in the middle, unusually the cab is entered through the roof hatches.
The FV6 Stalwart is based on the FV603 Saracen 6x6 Armored Personnel Carrier chassis, a number of automotive components are interchangeable. Powered by a Rolls-Royce B-81 Mk.8B petrol engine, developing 220hp powering a full-time all-wheel drive system. The FV620 Stalwart has an impressive cross-country mobility, and is fully amphibious with minimal preparation. On water this cargo vehicle is propelled by two waterjets, giving a maximum amphibious speed on water was of nearly 7mph. It is worth mentioning that waterjet units of the Stalwart were complex and troublesome to maintain, and was common to remove them when amphibious qualities were unnecessary, to simplify maintenance.
Production of the Alvis Stalwart ended a long time ago, then it was also withdrawn from the British Army service, it's Amphibious Transport role was taken over with the use of Utility Helicopters. Many of these Amphibious Carriers were sold to modern-day enthusiasts, many being converted to 'Amphibious Tour Vehicles'.
Variants:
▪︎FV622 Stalwart Mk.2 - General Service, it could carry up to 38 fully-equipped Troops. It could carry a field refueling pack, instead of the cargo. The Stalwart Mk.2 was fitted with improved waterjets. Its maximum speed on water was about 8mph.
▪︎FV623 Stalwart Mk.2 - Limber, artillery re-supply vehicle, fitted with a hydraulic crane in the cargo area, Engineering Vehicle, based on the Mk.2. It was also fitted with a crane.
General characteristics:
▪︎Place of Origin: United Kingdom
▪︎Manufacturer: Alvis Car and Engineering Company
▪︎Manufactured: 1963 to 1971
▪︎In Service: 1964 to 19893
▪︎Crew: Driver and up to two Personnel
▪︎Powerplant: Rolls-Royce B81 Mk.8B eight-cylinder water-cooled 6.5 L petrol engine, 220hp
▪︎Gearbox: Alvis 5 speed box
▪︎Transfer Box: Forward and reverse, giving 5 gears in both directions
▪︎Driveline: Non slip differential to bevel boxes, producing permanent 6 wheel drive
▪︎Length: 20ft 10in / Width: 8ft 7in / Height: 8ft 8in to load cover pole
▪︎Weight Empty: 8.500 long tons / Weight Fully Laden: 13.999 long tons
▪︎Suspension: Independent parallel wishbone links and torsion bars per wheel station
▪︎Armour: none - but hull protected crews from Anti-Tank Mines in Aden
▪︎Road Speed: 40 mph at 4000 rpm
▪︎Water Speed: 6 knots
▪︎Fording Depth Prepared: Amphibious to full flotation
▪︎Approach Angle Laden: 42 degrees / Departure Angle Laden: 29 degrees
▪︎Max Gradient: 21 degrees / Maximum Gradient Restart: 18 degrees
▪︎Side Overturn Angle: 31 degrees for FV620/FV622
▪︎Maximum Vertical Obstacle: 1ft 6in
▪︎Trench Crossing: 5ft
▪︎Ground Clearance: 1ft 4in laden FV622
▪︎Turning Circle = 1/R and L/H lock 49 to 59ft
▪︎Vehicle Range: 400 miles
▪︎Fuel Consumption: 4 mpg
Sourced from www.military-today.com/trucks/alvis_stalwart.htm