The Crossley TDD4 and 6 trolley buses

The TDD6 3 axle, 6 wheel, trolley buses were  introduced in 1935 and the TDD4 2 axle, 4 wheel, model in 1936. The last TDD6s were built in 1940 and TDD4s in 1942. All were fitted with double deck bodies. The TDD 4 was built on a modified Mancunian bus chassis.

Chassis numbers were:

92301 to 92317 - TDD6. 17 built.

92401 to 92497 -TDD4. 97 built

BODY STYLES

Crossley TDD4 trolley bus
 A Manchester Corporation Crossley bodied TDD4
Crossley TDD6 trolley bus

The Crossley bodied TDD6 supplied to Belfast.

The trolley buses were supplied to the following operators-

Operator TDD4 TDD6
Manchester 68 12
Hull 20 -
Ashton-under-Lyne 9 3
Belfast - 2

77 of the TDD4s had Crossley bodies using Metro-Cammell framework but the 20 supplied to Hull were by Craven.

16 of the TDD6s had Crossley bodies using Metro-Cammell framework, the remaining one, one of two supplied to Belfast was by Harkness. 7

The TDD4 chassis was priced at £1150.

Manchester withdrew their last TDD4 in September 1960 and their last TDD6 in April 1956.

SPECIFICATION

Engine/gearbox/transmission
Body/chassis

Motors
Metropolitan-Vickers MV202FW (TDD4)  or MV206A2 (TDD6)
motor output
85 hp (TDD4)
95 hp (TDD6)
motor control
Regenerative
Overhead line voltage
550 v dc
max speed (approx)
n/a
Rear axle
differential offset to off side (right)

 

wheelbase
16 feet 7 1/2 inches (5.067 m) 
length
27 feet 6 inches (8.382 m)
width overall
7 feet 6 inches
weight
7 tons 1036 pounds (TDD4)
9 tons 224 pounds (TDD6)
steering
cam and lever
suspension - front
semi elliptic springs
suspension -rear
semi elliptic springs
brakes
Air pressure assisted
wheels/tyres
n/a

 

 

RETURN TO CROSSLEY PRE WAR BUSES

© Malcolm Asquith 2007