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From: dnc@clyde.UUCP (Don Corey)
Newsgroups: net.railroad
Subject: Re: trucks
Message-ID: <677@clyde.UUCP>
Date: Mon, 10-Dec-84 22:23:07 EST
Article-I.D.: clyde.677
Posted: Mon Dec 10 22:23:07 1984
Date-Received: Tue, 11-Dec-84 04:34:59 EST
References: <147@decwrl.UUCP>
Organization: AT&T Bell Laboratories Whippany NJ
Lines: 26

I have a xerox article out of a past issue of "Model Railroader" magazine.
It has this to say about freight trucks.

Archbar	- These trucks have sideframes made of individual metal straps, long
	bolts, and removable journal boxes. They were first introduced about
	1860. In 1938, the ICC banned their use on cars interchanged between
	railroads because they were subject to metal fatigue. The article
	states that they are still used on maintenance-of-way cars and other
	cars not used in interchange service, but I don't know when the article
	was published.
Bettendorf - In 1903, the Bettendorf Co. designed a one piece cast-sideframe
	truck with integral journal boxes. There were several competitive
	designs of this truck that differed in shaping, but not in principle.
	These included Dalman, Symington, and Taylor.
Andrews - These trucks look like the bettendorf trucks, but they have a support
	under the journal box. These trucks could use the journal boxes from
	the discarded archbar trucks.
Roller bearing - The Model Railroader article did not mention roller bearing
	trucks, and I don't know much about them since I am modeling the
	early 1950's. To me, the look like Bettendorf trucks with a distinctive
	disk shaped bearing. I do know that in 1968, the AAR made them mandatory
	for all new cars.
-- 
Don Corey
AT&T Bell Laboratories
WH 2A-140 (201) 386-2349 ihnp4!clyde!dnc