Udagamandalam/Udagai/Ooty/Ootachmand/Nilagiri - Mettupalayam Passenger's loco change at Coonoor.
This video shows the grace of the X class oil fired steam engine, which smokes up and chugs on to PF 1 to link up to the three coach rake and haul down hill - Nilagiris to Mettupalayam.
The reason they have only three coacher, as explained by the guard is that, at any point of time during Downhill/Uphill, the mean height from the front of the train to the end of the train shouldn't be more than 3 ft to ensure stable...
more... coupling among the coaches and as well as with their lead.