Gan Island Post 13th December 1970
1. Such a brief statement might call to mind the names of many and varied personalities past and present.
However there are two other "Stalwarts" here of the non-human variety. They are the vehicles in use by the
Station Fire Service. Many Gan personnel have little knowledge of these machines.

The "Gen".

2. The "Stalwart" is a Truck, high mobility load carrier 5 ton 6x6 Alvis MK's 1 & 2. It is amphibious and was
designed originally for six roles with an inland water crossing capability. Used extensively by the British Army.

(1) Forward. POL Supply (eg tank and other armour support)
(2) Ammunition Supply
(3) Limber for Abbot Gun
(4) Bridge Building
(5) Radar Vehicle
(6) Missile Launching pad

3. One of Gan's complement of two MK 2s presents a new concept in that it has been adapted for use as
a "Reef Rescue" vehicle manned and operated by Fire Section personnel. The Gan reef' rescue vehicle is
modified and it carries a small portable engine driven water pump for first aid fire fighting at sea, oxygen
apparatus, 4 life rafts1, life jackets, dry powder extinguisher, rope reel and it is also equipped with radio for
talking to Air Traffic Control. It can be driven off any fore-shore on the island. straight into shallow or deep
water. Once it is floating the Dowty propulsion units are engaged. The 2nd vehicle is used mainly for training
purposes. Selected personnel of SNCO rank in trades of MTD MT Pitt & Firemen undergo courses of training
at Army schools in Bordon, Hants to qualify on this vehicle type for driving/testing/operating and servicing purposes.

All courses are to instructor standard and thereby the Fire Trade SNCO is qualified to train fire section personnel
in the full usage of the Stalwart for RAF requirements.

4. Some Vehicle Data (Mk 2) Height (max) 8 ft. 6 ins.
Length (max) 20 ft, 1O 3/4 ins.
Width 8 ft.
Weight (unladen) 8 tons 18 cwts.
Payload 5 tons
Ground clearance 1 ft. 4 1/2 ins.,

6. Powered by Rolls Royce B.82 8 cyl. in line 4-stroke gasoline engine.
Developing 220 B.H.P @ 3,750 R.P.M. (Gov). Capable of: Max governed R/speed of 40 MPH. Flotation speed
in excess of 6 knots, Max gradient 24 degrees, vertical 1 ft. 6 ins, side overturn angle 34 degrees, trench crossing 5 ft.
turning circle 50 to 60 ft.

7. The vehicle is fully water proofed, tropicalised and performs its floatation duties by the use of twin Dowty marine
hydro-jet propulsion units driven by power take-off from the main engine. The six-wheel configuration is not new to
the RAF as this type of chassis is similar to the Mk VI truck fire crash. The driving position is the same (i.e. centre).
Whereas the Mk VI has pro-selected gears, the Stalwart (Mk2) has an "ALVIS" fully manual 5 speed gear box.
All gears are syncromesh except 1st. Reverse is selected by a change-over lever and may be used in the full range
of gears. Use of the non-spin differential in the transmission system gives a x-country performance second to no other.


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