The basic chassis of the Armstrong Goods, the frames are made from 1.5 mm steel sheet with 96 rivets per side using a copper snap to put in the rivets and stop the heads from distorting. The axles have squared ends that fit into squared holes in the cranks to assist quartering, and run in sprung brass axle boxes.
The wheels are cut from 6mm ali plate, the steel tyres are heat shrunk onto the wheels, just as full size practice..
The power unit is made up from items found on e-bay, the motor/gearbox that has been mentioned in other projects is rated at 400 rpm and drive through two helical and 2 to 1 spur gears to give an axle speed of 200 rpm at full speed.
The space between the inside frames will be visible so an ideal candidate for working inside motion.
Mike
