Fast endless Bi-directional spiral with an ho scale train Powered by what appears to be seven HO-scale locomotives, Risner’s creation also works in reverse. Facebook Prev Article Next Article Machinery Checkout these cool gadgets... Related Posts Useless Perpetual Devices Meet the Machinists Who Keep the New York Times Running Use Your GoPro As A Drone With This Quadcopter Water Transfer Printing – Amazingly Prints on Any Shape New Most Powerful Microscope – STEHM These Gears Are Synched at 4,500 RPM
