Still working on the 5"

This is the start of a 4wheel AWD tram with two 150 Watt motors.                             It may look like this...

Carriages for no: 12

Fuses for No: 12

Added 3A PPTC fuses (or Polyswitch) to the Li'l Big Hauler. These haver low resistance until a specified current is reached. The 'poly' film then rapidly heats and its resistance vastly increases. When current is removed the film cools, circuit restored... So they are really an auto resetting circuit breaker!