1. City Class 29.2400.3 Tram Presentation by TRAM Power Ltd. Unit 4
Carraway Road,
Liverpool L11 OEE
tel. +44 (0)
web :
Prepared by
Professor Lewis Lesley

2. Design Principles Proven design concept
The City Class tram from TRAM Power Ltd.
Has world wide application.
Innovative design and “components off the shelf”.
Components off the shelf (COTS) reduces costs
Low initial, low maintenance and low whole life costs.
The City Class tram is a highly efficient public transport vehicle.
Can compete with buses on operating costs.
Matches light rail for speed and comfort.

3. Mechanical TRAM Power design bogie All wheels separately rotate -
low track forces (bogie weight = 2200 kg)
All wheels separately rotate -
eliminating curve squeal
Wheels individually removable
for maximum life (>300,000 km)
Ultra comfort resilient wheel, need not be same diameter
Smoother ride for passengers
Central Articulation carried on two wheels
best use of space

4. Electrical Body mounted traction motors -
easy maintenance
No equipment inside passenger saloon -
full width flat floor
The light weight (22 tonnes) reduces power
saves more in electricity than the initial purchase price.
saves on infrastructure requirements.
Three phase AC drive, with regeneration to stand still
Programmable acceleration / braking and jerk rates
10% gradient capable
PLC “fly by wire” control system

5. Body & Structure Integral high strength body
fabricated from rustless steel (long life > 30 years)
Timoshenko crash worthy cab,
with driver survival zone
High passenger capacity (e.g. 200 in 29 metre vehicle)
Compatible with all passenger facilities,
e.g. air conditioning
Easy mid life modification,
adding longer articulation unit to increase capacity to 300 passengers
Low floor (300 mm) and high floor (760 mm) options
Length in 1500 mm modules, from mm to mm
Width from 2400 mm to 3500 mm
Height from 2900 mm (including double deck option)
Flat articulation floor, with clear passage 1000 mm wide

6. Development Computer simulations laboratory models bench testing
mock up
slave vehicle
prototype tram
production vehicle

7. Testing Mock up Slave vehicle Prototype
built 1993 for trade exhibition
Slave vehicle
1930 tram with
TRAM Power equipment at one end
operated
Prototype
tested at Blackpool 1998 and 2000
with HMRI approval.

8. Mock up 4 tonne Low/High floor - 25% length full size
Exhibited and market research in
Birmingham, Blackpool, Chatham, Dublin, Edinburgh, Gloucester, Liverpool, London & Sheffield

9. Slave Tram Redundant 1930’s tram for scrapping
One original bogie and drive removed
TRAM Power bogie
90kW 3phase industrial motor and
Inverter drive fitted
Tested on Blackpool Tramway

10. Prototype Tram 29m long single articulation
bogie, motor and inverter from Slave tram
with second identical set added
tested with HMRI approval

11. Production Vehicle Prototype completely refurbished 2005 new motors
smaller
more powerful
new inverters

12. The City Class Family 15 m horizontal track radius
100 m vertical curve capable
Magnetic track brakes for emergency braking
MU compatible

13. Easy to move
Each LRV needs only 3 trucks to move

14. Making the NEWS