27158Re: Derails where and Why???
- Jan 20, 2014Michael,
Derail usage varies according to the requirements of the particular
railroad, at taht pdriod in time.
Derails would be found at most/all spurs off a main line where cars may
be left. They are also at the ends of (passing) sidings.
An exception might be if the track is sufficiently upgrade to the main
track, with no downgrade on the off-main track that would allow a car to
attain enough speed to overcome the grade.
Derails on passing sidings would be located on the siding side of the
clearance point. The New Haven commonly used derails that were pipe
connected to the siding switch stand, so that opening the switch also
dropped the derail.
Top-of-rail derails are located on the rail away from the main track and
divert wheels on that track to the outside of the track, dropping the
opposite wheel between the rails. These derails, steel castings, may be
designed to derail in one direction only or may be bi-directinal. They
may also be pivoted to flip up over the rail or slide up, pushed from
between the rails. They may be switch stand operated or merely flipped
up over the rail, locked in either position by a switch padlock.
Split point derails are becoming more common on industrial track in my
area, Massachusetts, following the runaway a few years ago of a loaded
lumber car that went over a derail, entered a main track, and hit a
commuter train head on.
I am making up a few derails, tell me if I am wrong, they would be
placed on a siding where if anything decided to run away it would derail
before it hit the main track.
- << Previous post in topic Next post in topic >>