20-ton Dennis six-wheeler
If you've noticed an error in this article please click here to report it so we can fix it.
• Six-wheel versions ofthe Dennis DB 15.5 four-wheeler have been introduced. Gross weight limits are 20 tons and it is said that within this figure payloads of 14 tons will be possible.
A Primrose axle is added to the basic DB 15.5 to produce a six-wheeler, there heing two types listed. On one a self-steering axle with single tyres is placed in 'front of the driving axle while the second has a fixed twin-tyred trailing axle to the rear. In both cases the added axle has air suspension with a control that can be used to exhaust air from the bags to transfer load onto the driving axle.
The 1211 4in. wheelbase is available with the trailing axle only when the wheelbase (centreline front axle to centreline bogie) becomes 1411 6.5in. There are both versions on the 14ft Sin, model with wheelbases of 12ft 3in. (self-tracking) and 16ft 7.5in (trailing axle). In the case of the models based on the 1711 Sin. DB 15.5, wheelbases are 1511 3in. and 1911 7.5in. respectively, the latter chassis being suitable for carrying 30ft containers.
The basic specification of the DB 15.5 is retained for the six-wheelers including the cab, Perkins 6.354, 120 bhp diesel, Dennis five-speed gearbox and Eaton two-speed driving axle.