The Mk 5A was the first  appliance to use air-blown foam installed by Pyrene.

Chassis

Thorneycroft Nubian 4 X 4

Engine

Rolls Royce B80 Petrol, 155 bhp @ 3,500 rpm.

Dimensions

Length - 21ft 0in/6.40m; Width - 7ft 6in/2.30m; Height - 10ft 0in/3.05m; WB - 12ft 0in/3.65m; G/C - 12in/300mm

Weight

Unladen - 9 tons 2 cwt

Water Tank Capacity

450 Gallons

Foam Liquid Tank Capacity

65 Gallons

Foam output (finished foam)

3920 Gallons per-minute through monitor and one side-line