Originally Posted by Matt Kirsch:
GRRR, I just got the Chessie Flyer set in the mail yesterday. Turned it over, and saw a CAN MOTOR. It's DC!
No double heading for a while anyway, at least not until I can find an AC drive or a different 4-4-2.
What vintage is the Chessie Flyer set you have? Just because it has a can motor doesn't automatically mean it's configured to run only with a DC power pack.
Virtually all modern O gauge locomotives built within the last 20 + years have can motors; the reason they work with AC transformers are because they are equipped with integrated DCRU boards (explained below) from the factory that rectify the AC power from the track to DC for the motor.
A very small handful of late MPC- early LTI era entry-level train sets ran on straight DC, but they were exceptions to the overall rule. You can buy & install a cheap bridge rectifier from an electronics store like Radio Shack so it will run okay on AC, and even buy a SPDT switch so you can reverse polarity manually to make it change direction. Or, you can buy an integrated DCRU kit from Dalee or a couple of other similar vendors; the DCRU rectifies the AC to DC, but also provides direction control via old-school traditional power cycles from the transformer.