The ‘P’ Type 1978 – 1991
For the replacement for the ‘N’ Type S&D revertedto an all steel cab manufactured in their own works.
1978 The ‘P’ type Revopak
For the ‘P’ series the all steel tilt cab was designed by Ogle design of Letchworth and Dennis used a similar design also by Ogle. The cab components could be produced using a press brake and tooling costs were around £10,000 compared to the millions required for a conventional pressed steel cab. [Kaleidoscope caption 151]
1978 The ‘P’ type Intapak
The Intapak design was carried over from the ‘N’ series to the ‘P’ series. The distinctive livery for demonstrator vehicles was introduced by Malcolm Bates SD’s Publicity Manager from 1969.
1978 The ‘P’ type Maxipak
Unlike the Revopak, which was a continuous loader, the Maxipak was an intermittent loader. The mechanism was more complicated than the Revopak’s as it utilised a sweeper blade and a packer blade which were both hydraulically operated. The distinctive hopper is deeper than that of the Revopak and the support structure is evident as the hydraulic cylinders are inside the body so that side cover panels were not required. Technical details of the Maxipak can be found on the Technical Page.
1978 The ‘PN’ type Revopak
The narrow bodied PN’s had a similar Ogle designed tilting cab. The example shown is a 1982 PN Revopak ex-Isles of Scilly owned by Steve Jones from the Isle of Wight Reg No. SCY 786 X photographed at the Southern Counties Historic Vehicles Preservation Trust’s rally at Edenbridge, Kent, in June 2009
1983 Redesign of the body
A squared off version of the body was introduced in 1983 and later an all steel body. Shelvoke & Drewry was now owned by Krug International’s Dempster Division hence the vehicles were given the title Shelvoke Dempster.
1983 The ‘P’ series RouteChief & RouteKing
When Krug International bought S&D in 1983 the Dempster RouteChief and RouteKing became available on ‘P’ series chassis. The caption to the photo reads:- “Route Chief ready for demonstration. Tiverton 1986.”
Chassis Type Definitions
PN 11.5 tons GVW
PNL 12.5 tons GVW
PNL+ 13.5 tons GVW
PY 16.0 tons GVW
PT 22.0 tons GVW on three axles.
By 1980 when Kaleidoscope of Shelvoke & Drewry was published Shelvoke & Drewry had produced their 25,000th vehicle.