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Transition curves that connect two of these structures traditionally have an Euler (“OY-ler”) spiral geometry. For 10 points each:
[10m] Name these structures that are most often built with a flat-footed, or Vignoles (“vin-yoles”), profile whose cross section is akin to an I-beam.
ANSWER: railroad tracks [or railway tracks or train tracks; or rails; accept permanent ways or perways]
[10h] The U.S. standard formula for minimum transition curve length sets spiral length equal to 1.63, times this quantity’s “deficiency,” times speed. Superelevation and this quantity both refer to the difference in height between the inner and outer rail along a curve.
ANSWER: cant [accept cant deficiency]
[10e] The lateral change in this quantity is a proposed criterion for evaluating track transition curves. For objects going around a curve, this quantity equals velocity squared over the radius of curvature.
ANSWER: acceleration [accept centripetal acceleration; accept lateral change of acceleration; prompt on a]
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2024 ACF Nationals2024-04-21Y247.9275%4%0%

Data

VirginiaArizona State001010
Johns HopkinsBrown001010
Chicago BChicago A0000
Columbia BFlorida001010
Chicago CHarvard001010
Iowa StateBerkeley A001010
MarylandMichigan001010
Cornell BMinnesota B001010
North Carolina ACornell A1001020
KentuckyNorth Carolina B0000
NorthwesternIllinois001010
PennClaremont Colleges0000
OttawaRutgers0000
Berkeley BSouth Carolina001010
Columbia AStanford001010
TexasIndiana001010
Toronto AGeorgia Tech001010
Chicago DTruman State001010
VanderbiltMcGill0000
WUSTL AMinnesota A001010
WUSTL BDuke001010
PurdueWaterloo001010
Yale ANYU001010
Yale BToronto B0000