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 Tungsten Carbide Friction Drills Why Machines That Bend Are Better This ship partially submerges itself to load superyachts Genius Way to Save Parking Space The universe’s biggest gear reduction! Tourbillon: Testing of a new generation theme park ride
