The FV 620 Stalwart , informally known as the "Stolly" is a highly mobile amphibious military truck built by Alvis that served with the British Army The metre, or meter, is the basic unit of length in the International System of Units (SI: Système International dUnités). ... The word ton or tonne is derived from the Old English tunne, and ultimately from the Old French tonne, and referred originally to a large cask with a capacity of 252 wine gallons, which holds approximately 2100 pounds of water. ... A hoplite wearing a helmet, a breastplate and greaves (and nothing else). ... Gasoline, as it is known in North America, or petrol, in many Commonwealth countries (sometimes also called motor spirit) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ... The horsepower (hp) is the name of several non-metric units of power. ... The British Army is the land armed forces branch of the British Armed Forces. ...

History

The Stalwart was a private venture by Alvis that was adopted and entered service with the British Army in 1966 as a general transport truck in preference to the load carrier variant of the FV320. It was one of the same line of vehicles that included the Alvis Saracen and Saladin The high mobility and amphibious capabilities were considered ideal for resupplying units in the field. The British Army is the land armed forces branch of the British Armed Forces. ... General characteristics Length 4. ... General characteristics Length 4. ...

Design

The hull is the vehicle chassis, the engine is situated under the load deck in the rear of the hull and the gearboxes, differentials and transfer boxes forward of this. The load deck was open-topped with large drop down panels on either side. Waterproof seals ensured that these would not leak when in the water. The three man cab has the driver's posistion in the centre and a seat for a passenger either side. The cab can only be entered through roof hatches.

The Stalwart could carry 5 tonnes of stores, or tow 10 tonnes.

In the water it was driven by vectored thrust water-jet propulsion units at about 6 knots. Thrust vectoring is the ability of an aircraft to direct the thrust from its main engine(s) in a direction other than parallel to the aircrafts length. ...

The drive system including the all-wheel drive, mulitple gearboxes and the water propulsion units was complex and needed a lot of maintenance. When the amphibious qualities become unecessary, it was common for the water jets to be removed to reduce weight and maintenance.

Variants

FV620

First model

FV621

Stalwart Mk 1

FV622

Stalwart Mk 2

FV623

Stalwart Mk 2 Limber. An artillery ammunition supply vehicle. An ATLAS 3001/66 hydraulic crane was added to the cargo area.

FV624

Stalwart Mk 2 Recovery. Two extra seats and a crane added.

See also