> Posted by: "G C" [EMAIL PROTECTED] ecphora123
> Date: Fri Jul 14, 2006 8:05 am (PDT)
>
>So much wonderful help and information! Thanks to all who have
>shared their thoughts and experience. I will have to print all of
>this out and ponder it. Also, make a computer file as well. <cut>
Don't forget the vertical curve. It's the curve assumed by track as
it changes from level to a grade and back.
This means you cannot just use the grade expressed as a percentage to
figure out how long a track must be in order to cross over or under
another track. Because you can only gradually change the grade of
your track, what appears to be a 2% grade may be closer to a 3% grade
after allowing for the vertical curves at the beginning and the end
of the grade.
For good operation this needs to be a very large radius. If the
vertical curve is too sharp, your 2-10-4 may teeter on its center
driver at the top of a grade and at the bottom the center driver may
be lifted on the track.
I have one vertical curve that is too sharp on my layout, but because
I run smaller engines it doesn't create an operational problem, only
an aesthetic one.
--
Bill Roberts
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/S-Scale/
<*> To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
