PART 3 Boxers to Polkas The Story of George Forrester's Locomotives

Ron Fitzgerald explores the history of George Forrester, a little known but influential locomotive engineer. Continued from p.224 M.E.4748 July 26 In Forrester's adaptation of Carmichael's gear he discarded the use of two eccentrics as used on Swiftsure and relied upon a single one for each cylinder in the 2-2-2. The eccentric rods were shortened and the levers lengthened to produce a greater angle of movement. By splitting the single eccentric rod of Carmichael's gear into two diverging arms, the distance moved to engage alternate pins was greatly reduced. The arm that was in engagement was pressed into contact with the fork of the gab by a roller on the reversing rod which was also responsible for raising the pin into its appropriate position to lock into the gab seat.…

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Model Engineer (Digital) - 1 Issue, Issue 4750

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