Underfriction
Roller coaster up-stop wheels that hold cars to the track
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]
References
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Roller coasters
- Roller coasters by country
- Brake run
- Inversion
- Vertical loop
- Launch track
- Rollback
- Lift hill
- On-ride camera
- Single-rail
- Stadium seating
- Station
- Train
- Underfriction
- Wheel assembly
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