4-6-4-4
 |
In
railroad steam locomotive that has four leading wheels followed by six coupled driving wheels, a second set of four driving wheels and four trailing wheels
.
Other equivalent classifications are:
Italian classification
)French classification
: 2322Turkish classification
: 3524Swiss classification
: 3/5+2/4 up to the early 1920s, later 5/9
The sole example of this arrangement was the
PRR Q1. This locomotive was essentially a prototype in the development of the PRR Q2, a 4-4-6-4
.
References
 | This steam locomotive-related article is a stub. You can help Wikipedia by expanding it. |