On a roller coastertrain, the underfriction, up-lift, or up-stop wheels are a device to keep the train from jumping off the track under intense movement.[1] The design was patented in 1919 by John A. Miller.[2][3]
A roller coaster wheel assembly. The underfriction wheels are on the bottom. The three sets of wheels clamp onto the track.
underfriction, roller, coaster, train, underfriction, lift, stop, wheels, device, keep, train, from, jumping, track, under, intense, movement, design, patented, 1919, john, miller, roller, coaster, wheel, assembly, underfriction, wheels, bottom, three, sets, w. On a roller coaster train the underfriction up lift or up stop wheels are a device to keep the train from jumping off the track under intense movement 1 The design was patented in 1919 by John A Miller 2 3 A roller coaster wheel assembly The underfriction wheels are on the bottom The three sets of wheels clamp onto the track References edit Witter Bret 2003 Carnival Undercover Plume p 113 ISBN 978 0 452 28428 9 Pleasure railway structure Cartmell Robert 1987 The Incredible Scream Machine A History of the Roller Coaster Popular Press p 117 ISBN 978 0 87972 342 2 nbsp This technology related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Underfriction amp oldid 1135261979, wikipedia, wiki, book, books, library,
