In an attempt to reduce the vibration in a piston driven steam locomotive, the duplex drive, was invented. Two sets of driving wheels, driven by seperate pistons, were put into a single frame. |
|
Class | Wheel Arrangement | km/h | hpi | Year | |||
---|---|---|---|---|---|---|---|
France: Nord | |||||||
600 | CC n4t | 1862 | |||||
France: PLM | |||||||
75 -> 80 -> 151A |
1'BC1' h4v | 1930 | |||||
Germany | |||||||
XV HT V -> DRG 79 |
CC h4vt | 1916 | |||||
Spain: Nord | |||||||
800 | CC n4t | ||||||
USA: Baltimore & Ohio | |||||||
N-1 | 2'BB2' h4 | 1932 | |||||
USA: Pennsylvania Railroad | |||||||
Q-1 | 2'CB2' h4 | 1942 | |||||
Q-2 | 2'BC2' h4 | 1944 | |||||
S-1 | 3'BB3' h4 | 193 km/h (227 km/h) |
7200 hp | 1939 | |||
T-1 | 2'BB2' h4 | 193 km/h (220 km/h) |
6552 hp | 1942 | |||
T-1a | 2'BB2' h4 | 193 km/h (220 km/h) |
6552 hp | 1942 | |||