The Bengal Nagpur Railway class P was a class of four
4-8-2+2-8-4 (“Double Mountain”)
Garratt locomotives. It was developed from
BNR class N and
BNR class NM. The
Anuppur-
Chirmiri section had severe curves and it needed an engine with a trailing bogie. Its boiler was slightly enlarged similar to the NM.
It could haul 1,500 long tons (1,500 t) load up a 1 in 91 gradient.[1]