[Date Prev][Date Next] [Chronological] [Thread] [Top]

RE: (erielack) Superelevation - cant deficiency

In practice, I've never had a problem with warping of the stripwood. Perhaps 
it's so thin, any warpng is not noticable. If you were concerned about this, 
you can always seal it as you do with plywood. I wouldn't mind a little bit 
of uneveness; after all, I model EL in the 70's, but so far it looks like 70 
mph track. Styrene is certainly another option, but all my mainline curves 
are on handlaid track and I like to drive one spike through the strip, which 
would be more difficult with styrene.

As for superelevating risers, you have to keep in mind that since your 
benchwork grid or joists are laid out at right angles, some of your tilted 
risers are going to be at some angle other than 90 deg to the subroadbed. 
This will introduce undulations in the subroadbed (mini-grades) unless you 
do as Joe Braun and attach the riser to a wedge cut to the angle that will 
place it at roughly 90 deg to the subroadbed.

Here's a tip for the circumstance that you find you've made the easement 
into superelevation too abrupt, causing 85'-plus cars to derail. If you 
can't loosen one truck bolster enough to fix the problem, place a guardrail 
of the same code as the running rail inside the outer rail on the portion of 
the curve wher you're getting dertailments. This keeps the wheelset from 
derailing to the inside. Not prototypical but can save you from tearing up 
the track and starting over.

Paul B

From: "Tupaczewski, Paul R \(Paul\)" <paultup_@_alcatel-lucent.com>
Subject: RE: (erielack) Superelevation - cant deficiency

> Since most of my RR sits on plywood
> sheets, I use stripwood underneath the outside rail, sanding
> down each end to achieve easements. With easements applied
> also to the curvature, the whole effect is quite pleasing.

The one potential drawback of using stripwood is that the moisture it
soaks up from ballasting might warp it. Another option is to use styrene
strip in place of stripwood.

Jeff Mutter told me of a novel approach he uses - strips of masking
tape! To make the track higher, just keep layering on more masking tape.

Of course, as Paul B. pointed out, if you have risers supporting your
roadbed/subroadbed, it's a pretty simple task to mount those at an
angle. This is where a digital scale that shows angle or slope is VERY
useful...

- - Paul


 


	The Erie Lackawanna Mailing List
	http://EL-List.railfan.net/
	To Unsubscribe: http://Lists.Railfan.net/erielackunsub.html

------------------------------

End of EL Mail List Digest V3 #2885
***********************************