Steam-Engine specification for the 0-4-0 CLASS B locomotive No. B779 on the Darjeeling Himalayan Railway. This spec is for the loco rated at 160 psig boiler pressure. The performance in the spec is modified to increase rated starting TE of 8860 lbs by 120% for use in TRS2004 where the grade resistance due to gravity is incorrect. The steam-power block corrects this for use in TRS2006. To work on the TNG DHR route project with current grade profile the power output thru the entire speed range has been increased by 138%.