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Published on Nov 21, 2009
This is, without a doubt, the fastest K'nex roller coaster ever built. Using rocket engines, The Railgun can achieve speeds of over 120 miles per hour! This video shows the evolution and modification of The Railgun. All the tests shown are in chronological order. This rollercoaster was built over the course of 3 days by Austin Granger, Paul Davis and Sam Ihlenfeldt. The track measures 40 feet long and uses no non-k'nex pieces (except the rocket engine). Speeds were computed by using the solar lights next to the track as foot-markers and going through the video frame-by-frame.
I know I will probably run into some people saying this is not really a Roller Coaster, just a straight track. For these people, I can at least claim that this is the fastest speed a K'nex car has ever traveled down a K'nex track.