NightatLaira
Member
- Joined
- 14 Jun 2010
- Messages
- 490
I'm interested in knowing about the development and design behind the long wheelbase coal wagons which started taking over from the HAAs of the 80s and 90s.
Why do they have fronts and rears which point diagonally downwards as opposed to a traditional hopper. Does this make them easier to fill/load/unload? Where was this approach first pioneered?
I remember seeing HAAs regularly until around 2005, I know they still do the occasional rounds in places, but Are they due to be phased out?
Why do they have fronts and rears which point diagonally downwards as opposed to a traditional hopper. Does this make them easier to fill/load/unload? Where was this approach first pioneered?
I remember seeing HAAs regularly until around 2005, I know they still do the occasional rounds in places, but Are they due to be phased out?