Re: PFE R-30-9

Doug Brown <brown194@...>


I think you are confusing the Barber lateral motion device with their
S-2 friction device (wedges). The lateral motion device went between the
truck bolster and the spring group to allow the car to move sideways
(lateral) relative to the trucks, lessening damage from shocks due to
rapid changes of direction from switches and other track conditions. The
wedges acted as shock absorbers for vertical motion such as rocking from
side to side due to poorly supported track joints.

Doug Brown

-----Original Message-----
From: Tim O'Connor [mailto:timboconnor@...]
Sent: Monday, January 31, 2005 8:37 AM
To: STMFC@...
Subject: Re: [STMFC] PFE R-30-9

Richard Hendrickson wrote

Brian, in all of the photos I have of R-30-9s after the T-section
were replaced, the trucks that replaced them were AAR with spring
and Barber lateral motion bolsters. No one makes that truck in HO
but the closest thing to it is Accurail's mis-named "Bettendorf" truck.
"AAR" covers a broad spectrum, eh? A 1954 photo of PFE #93151 shows two
different trucks. Both have spring planks as you say. One resembles the
'Type Y' (2DF8) sideframe. An earlier photo of PFE #85210 clearly shows
this sideframe, and it does not appear to have the friction wedges which
(I think) identifies the Barber bolsters (or not?).

Tim O.

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