| 词条 | Vertical Velocity (roller coaster) |
| 释义 |
| name = Vertical Velocity | image = | location = Six Flags Great America | section = Yankee Harbor | type = Steel | type2 = Inverted | type3 = Launched | manufacturer = Intamin | designer = | model = Shuttle Coaster | track = Twisted Impulse | lift = LIM | status = Operating | opened = {{Start date|2001|05|18}} | height_ft = 185 | length_ft = 630 | speed_mph = 70 | inversions = 0 | capacity = 1100 | restriction_in = 54-80 | trains = 1 | carspertrain = 7 | ridersperrow = 2 | rowspercar = 2 | virtual_queue_name = Flash Pass | virtual_queue_image = Fastpass availability icon.svg | virtual_queue_status = Available |transfer_accessible = available | rcdb_number = 747 | coordinates = {{coord|42|22|04.59|N|87|55|56.70|W|type:landmark_region:US-IL_source:dewiki|display=title,inline}} |logo=}} Vertical Velocity (V2) is an inverted steel roller coaster located at Six Flags Great America in Gurnee, Illinois. Manufactured by Intamin under the trade name Twisted Impulse Coaster, this launched shuttle-style coaster, located in the Yankee Harbor section of the park, has been operating since May 18, 2001. The coaster's single seven-car (28-passenger) train runs along a 200 m (656 ft) U-shaped track, incorporating two {{convert|185|ft|m|adj=on}} vertical towers. The forward tower incorporates a twisted spiral, and the rearward towering provides a straight freefall. The 20 m (65 ft) train, propelled by linear induction motors (LIMs), is accelerated in less than four seconds to {{convert|70|mph|abbr=on}} toward the forward tower before dropping back down through the station house and up the rearward tower. A holding brake is incorporated on the rear straight tower and is able to suspend the train momentarily (usually on the final ascent during each ride) before dropping it back down to the station house. However, the holding brake has not been used since September 2008 due to maintenance issues. The train passes, at speed, through the station four times per {{convert|2700|ft|m|adj=on}} ride and is smoothly braked by eddy-current braking before being brought into final position at the station by the LIMs. Vertical Velocity is similar to Steel Venom at Valleyfair, and also similar to Possessed at Dorney Park and Wildwater Kingdom. Timeline{{Stack||float=right}}
References
9 : Roller coasters operated by Six Flags|Six Flags Great America|Roller coasters introduced in 2001|Roller coasters manufactured by Intamin|Steel roller coasters|Inverted roller coasters|Launched roller coasters|Shuttle roller coasters|Roller coasters in Illinois |
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