This book begins with
the introduction of the Double-Geared Super-Sentinel waggon in
November 1927 and known as the DG.
Like all previous Super wagons these
were originally all supplied on solid rubber
The unique feature of the new wagon was that the crankcase had been extended to include a two speed gear with the differential now in the lay-shaft.
Sentinel had supplied a number of six-wheeled articulated Super waggons but the first DG was a rigid six wheeler with double chain drive to both rear axles. [picture 1] A few months later they also introduced a four wheeled DG4. The six-wheeled DG6 proved most popular from the start outselling the DG4 two to one although the cheaper Super-Sentinel continued to be supplied for another three years.. In September 1930 Sentinel produced the worlds first rigid eight-wheeler a DG8. [picture 2 ].
The requirements of the 1930 Road Traffic Act lead Sentinel to introduce the lightweight DG6P on pneumatic tyres and later a DG4P then in November 1931 they were showing a shaft-drive DG6P at the Commercial Motor Show. [picture 3]. Only two of these were built but a prototype shaft-drive DG4P had been built in January 1931 which has survived into preservation.
In March 1933 Sentinel introduced the most revolutionary steam wagon to date which they called the ‘S’ type standing for ‘shaft-drive’. [picture 4].This was much lighter than the DG with a modern style cab, a four-cylinder single-acting engine and shaft drive through a two-speed gearbox and worm drive rear axle.
This book was published by Woodpecker Publications in 1988 and sold out four years later. I retained a small number which have been selling at an increasing price ever since. Currently there are only five left which are available at £100 incl Postage & Packing. I also try to buy second-hand copies whenever I can on the open market for re-sale. .
If you want to buy a second-hand copy then please e-mail me to check on availability and current price at :