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Enter your lung capacity in liters. Calculate by blowing up a balloon
or displacing water in a container. (Or estimate, huge lungs are~7, small
people~4)
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Calculate your VO2 maximum (if you don't know it) by filling out a page
for your best aerobic ride, preferably a hill climb over 1/2 hour, as these
are likely to be more accurate. Use the resulting figure , this will be a
benchmark for you.
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Enter the distance of the ride.
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Weight of your machine, water etc.
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Weight of you, clothes, Camelback, etc.
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Elevation gained. Total of all up-hills during the ride.
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Elevation lost. Total of all declines.
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Enter your chain condition. New, well oiled chain and gears give
an efficiency of ~95%. Dry, dirty chain and cogs can drop below 90%.
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Tire type. A fat knobby 2.25 is about .015, the best road tubulars
about .002! My 1.9 touring tire = ~.006. I am doing some more experiments
with large factor tires, and will include them in future updates.
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Enter your rear tire pressure, as 70% of your weight is there.
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Enter your normal position, frontal area depends mainly on this, .33 for
track racers, .5 for upright, .55 when honking.
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Enter the total time you ride, include brief stops.
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Enter the surface condition. This is the road surface factor. I.e., the
number of times more resistive a surface is than smooth concrete
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Smooth pavement= 1.0
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Rough pavement= 1.1 - 1.3
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Dry, hard dirt or cinder= 1.3 - 1.6
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Deep, dry sand= 6+
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Wet, firm cinder/sand= 2.0 - 3.0
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Deep mud= 5+
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Enter your Cd, loose shirts/jackets add at least 10% over tight
jerseys!
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Hit the CALCULATE button for the results. Use <alt>+< or the
back button to return.
Note: I would greatly appreciate feedback on people's results!
E-mail me at: rays aaat blue-cove.com (<- anti-spam version)
Thanks!
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