On Dec 6, 2006, at 3:16 PM, benjaminfrank_hom wrote:

Finsishing up an article for the November-December issue of The B&O
Modeler on Class W-1 and subclass hoppers and came across some odd
trucks. I've uploaded a detail photo in the STMFC files section
titled "B&O 334344 Class W-1A Truck Detail.JPG":
http://groups.yahoo.com/group/STMFC/files

Anyone know the type of this truck? Thanks in advance!

Ben, it's an arch bar truck with a Pilcher trussed side frame. See the 1922 Car Builders' Cyclopedia, p. 628.

Richard Hendrickson