It is not necessary to have a steel runnered sled to attain great coasting speed on a snowy hill. A bobsled can be built of an ordinary 2×12 inch plank and barrel staves which will pass anything on any hill, especially in deep snow. Besides the material just mentioned all that will be needed are a few pieces of 2×4 and a couple of carriage bolts.
Check out the whole project HERE
Retrorambling 