I thought I'd kick-off a new thread where people can ask "silly" questions that have nagged at them.
My question is: Why do diesel locos seem to have a large number of air hoses either side of their couplers? Back in steam days there was usually only one air hose....the exception I am aware of being the AD60 class Garratt, which had 2 hoses...one either side of the coupler.
I'd guess that one of the "extra" hoses is to couple the air systems together when multiple locos are in a "lash-up" so they have the benefit of all the locos' air tanks. I don't recall seeing ALL of the various hoses ever hooked up in any pics I've seen.