I noticed that the box for the Propane Turbine and the catalog description state that the engine is equipped with 4 motors.
Is that a printing error? I don't see how they could power 4 motors in that one unit. Joe
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Yes they did. PS-1 used a double rectifier for motor power heat sunk to chassis. In the PS-2 version the slave board was mounted on top of the PS-2 board. What a pain to fix or upgrade. I did one way back. With a custom built bracket and harness set up in PS-2 3V. G
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Yep, I'm just hoping that the boards in mine never croak, as George says, they're a PITA to work on. 
Mine looks nothing like the photos. It has 2 motors and is a 3 volt system. Someone must have converted the 5 volt system to 3 but there appears to be no room for a 4 motor set up. Strange. Would take photos but it's all packed away now. Thanks for the responses. Joe
