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Pursuit

Our two riders are doing a 4000 meter pursuit. Our Standard Rider is using a 28 bladed spoke, 650 wheel. Out Test Rider is using a Specialized 650 tri-spoke. Both riders are using the same disk in back (Ic value estimated). They are identical in all other respects. Which one finishes first? By how much?

The Specialized rider will be ahead by 14.8 meters, finishing 1.02 seconds sooner doing a 4:43 pursuit at an average power of 550 watts.

Enter data for cases of interest to you.

Speeds during pursuit:

Speed difference during the pursuit:

Data Parameters
Parameter Standard Rider Test Rider  
Frontal Area 0.5 0.5 m2
Coefficient Wind Drag 0.5 0.5 dimensionless
Air Density 1.226 1.226 kg/m3
Weight Rider 65.0 65.0 kg
Weight Bike 8.0 8.0 kg
Front Wheel      
Weight 1.179 1.207 kg
Ic 0.0632 0.0683 kg m/s2
Cx0 0.0491 0.0379 Dimensionless
Radius 0.308 0.308 m
Rear Wheel      
Weight 1.636 1.636 kg
Ic 0.0865 0.0865 kg m/s2
Cx0 0.0361 0.0361 Dimensionless
Radius 0.337 0.337 m
Rear Shelter 25. 25. %
Power 550. 550. w
Coefficient of Rolling 0.004 0.004 dimensionless
Grade 0.00 0.00 decimal
Initial Speed 0.0 0.0 m/s

© 1998 Tom Compton