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A flexible small-capacity tram vehicle for urban and suburban use in small terms and cities, or as a local feeder to mass transit systems.  Flexible external appearance and internal layout.  Traction power derived from small automotive internal combustion engine for longer routes or from intermittent electric supply, requiring contact with power source at stopping points only (where stops are close together and zero emission operation is required).

Typical Details

Length 7.4m
Width 2m (PPM 30) / 2.4m (PPM 35)
Height 2.7m

Floor height above rail level:

Passenger accommodation:
Typical capacity 15-20 seated plus 10-15 standing (variable)
1 wheelchair position
Seating to suit customer requirements

PPM 35 Railbus - modern outline

PPM 30 District Tram - heritage outline

Click for printable specification
(.pdf format 644KB)

Primary driveline and transmission:
Self-powered vehicles    Engine Ford (propane gas or diesel fuel)
Primary transmission via gearbox, freewheel clutch and Tandler bevel box
4 ‘V-belt’ belt transmission to flywheel
Intermittent electric supply 70V DC motor (requires 20kW supply at stopping points)
‘Charge’ time at stopping points 30s, distance between stops up to 800m

Flywheel energy storage:
Effective speed range 1,000-2,600rpm
Flywheel diameter/mass 1m/500kg or 1.2m/750kg

Secondary transmission:
Pneumatic clutch and Linde two-way hydrostatic transmission and gearbox to driven axle
Twin-axle drive optional

Regenerative service braking against flywheel via secondary transmission 1m/s2
Emergency braking by spring-on/air-off disc brakes 3m/s2
Air operated sanding gear fitted

Running gear:
Gauges 1000mm-1676mm
Rubber chevron suspension

Auxiliary power:
24V control and vehicle systems, 12V engine systems, independent batteries

Maximum speed:
50km/h on suitable trackwork

Minimum curve radius:
15m for 1435mm gauge vehicles; smaller radii possible on narrower gauges

Maximum gradient:
1 in 15 (optional modification for 1 in 10)

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Page last updated: 16 May, 2007
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12 Parry People Movers Ltd

Company no: 2652429 Registered in England
Registered office: Overend Road, Cradley Heath, West Midlands B64 7DD