Thornycrofts had a long history of supplying military
vehicles going back to the Boer War when their steam vehicles were
described by General Kitchener as "The Best". The J Type (not
shown) was built in large
numbers during WWI. The A1/A2 was introduced in 1924 and was
available with a £120 subsidy. These 8 pictures below are A1's.
The A3 was developed from the A2 and
had a double drive rear bogie and auxiliary gearbox. The Thornycroft
patented rear suspension developed in collaboration with the War
Department, provided optimum traction at all times. The
pictures below show the range of movement allowed with this suspension
These 4 below are probably Tartars
The A3 was produced in a range of body
styles and for a variety of applications
The Tartar was developed from
the A3 as a fc 6X4 for general service and also in a bonneted
version which was used as a gun tractor see group 6
The A3 was upgraded as the A9
with a larger engine the OC4
The A9 was further developed as the XB,
mainly for South Africa, with
longer wheelbase and heavier axles and a range of engine options. This
became the Amazon which was used extensively in WWII as a crane chassis.