02-19-2010, 09:59 AM
andersley Wrote:Just had a reply from a train driver I know (passenger trains, though). He says we use a two-pipe brake system, one for brake operation, the other to keep reservoirs at full pressure. I suppose this reservoir air could be used for the hopper doors, or maybe there is an installed air supply at the discharge site (coal fired power station).That was too obvious, of course they could use the resovoir line for both purposes.
Charlie