Motor test bed #2- Southern Pacific SD9 (Download for $)

This engine has been tested extensively during the Athearn tune up series Described in another post. The motors tested here are as follows: 1. Athearn blue box rectangular gold stock with brass fly wheels #1 2. Helix Humper Can motor #1 3. P2K stock open frame motor and brass fly wheels #1 4. Mashima 1824 …

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