Budget 4WD Electric Chassis Kit
This chassis provides a sound basis for scratch building your own locomotives.  The main chassis is formed from ABS moulding wheels and axles are steel with brass wheel bearings and there is a worm drive to both axles. The tough electric motor will operate  with 6 to 12 volts and can be used  with a speed controllers and r/c.  
DATA: Wheelbase: 48 mm. Wheel dia: 20 mm. Chassis length: 90 mm.
Height (from rail to top of motor): 32 mm. Fixing holes: 2 at 3.2 mm on 
80 mm centres.           
£35.00    Specify 32 mm or 45 mm gauge.