Power Train

Vehicles were powered with Rolls Royce C6 6 cylinder engines of 180hp, except M50136 which was fitted with two supercharged C6 engines of 230hp. The standard R14 gearbox, as fitted to the 101s was used on all vehicles.

50136 on trial with dynamotor vehicles

Interiors
The interiors of the 1957 cars will have matched the contemporary Class 101s being produced. The 1959 cars had maroon seating in second class.

From a Met-Camm publicity brochure - a rare colour interior photo, although possible a B&W pic that has been 'colourised'.

Cabs
Three different cab front were used on this class.

The four LMR power/trailer 1957 sets had the four lamp fronts.

The 3-car sets built in 1957 had two lamp fronts and the two-character train describer panel beneath the centre cab window.

In 1959 by the time the last 20 power cars were constructed the 4 character headcode box was mandatory. This headcode box was located above the driving cab windows where, due to its height and width, it barely fitted, so much so that a modification to the central cab window had to be made in order to accommodate the destination blind display. This involved fitting a smaller central cab window and lowering the destination box by about 5 or 6 inches into what was the window space.

After headcodes were abandoned in Jan 1976 these boxes were eventually removed and the space plated over, returning these vehicles to the original style though the lowered destination display remained making identification of these units easy.

Class 111 half engine conversions DHBS and DNS(L)
After the success of an experiment conducted by Doncaster Works on Class 104s 50446/50521 in 1982, it was decided to remove one engine and its associated equipment from the remaining Class 111 motor cars as a maintenance and cost saving measure. Centre trailers were removed where necessary and redeployed in other units, after conversion the remaining power cars were paired together as power twins With just one engine per car they had a combined 360hp, half normal power but enough for the duties they were to perform.

These units were operated by Neville Hill (NL) depot in Leeds, and carried "Metro Train" and South Yorkshire PTE logos.

Vehicles treated remained in the blue and grey livery but were renumbered in the 78xxx number series. The vehicles involved were all from the two later batches of Rolls Royce units. The four early units were not converted. All Rolls Royce engined vehicles were withdrawn by 1989 none being preserved, though three early vehicles did join the departmental fleet.