I've been training on my i-magic for three weeks (haven't got a road bike yet - just using an old one for turboing) and wanted to see how I'm doing so I set up a flat course of 10.42 miles and set about seeing how fast I could do it.
It came out at 29:46, passing the 10 mile stage at 28:22. I stayed in the 53-17 gear (lightweight that I am) and averaged a cadence of 93 rpm. Average power was 169w.
Obviously I can use that as a benchmark time and do the same course another time under the same conditions.
Anyway, I know this isn't *real* cycling but I wondered how close to reality that might be?
I've been training on my i-magic for three weeks (haven't got a road bike yet - just using an old one for turboing) and wanted to see how I'm doing so I set up a flat course of 10.42 miles and set about seeing how fast I could do it.
It came out at 29:46, passing the 10 mile stage at 28:22. I stayed in the 53-17 gear (lightweight that I am) and averaged a cadence of 93 rpm. Average power was 169w.
Obviously I can use that as a benchmark time and do the same course another time under the same conditions.
Anyway, I know this isn't *real* cycling but I wondered how close to reality that might be?
Tony
I'm unsure of the calibration and repeatability with that product but given your reported power, assuming average aerodynamics and 85kg bike + rider weight ..... plus a few other defaults from www.analyticcycling.com and NO wind ....
Effective Frontal Area (0.4 to 0.7 is typical).m2Drag Coefficient (Use default value).Air Density (or Air Density from Temperature, Barometric Pressure, and altitude).kg/m3 Sea Level 1.2261500 Meters 1.0563000 Meters 0.905Weight of Rider and Bike.kgCoefficient of Rolling Resistance. Wooden Track0.001Smooth Concrete0.002Asphalt Road0.004Rough but Paved Road0.008Slope.Rise/Run (decimal)Power.watts yields an estimated speed of 9.4 m/s. That's close to your time over 10 miles (unless I screwed up the math).
I'm unsure of the calibration and repeatability with that product but given your reported power, assuming average aerodynamics and 85kg bike + rider weight ..... plus a few other defaults from www.analyticcycling.com and NO wind ....
Effective Frontal Area (0.4 to 0.7 is typical).m2Drag Coefficient (Use default value).Air Density (or Air Density from Temperature, Barometric Pressure, and altitude).kg/m3 Sea Level 1.2261500 Meters 1.0563000 Meters 0.905Weight of Rider and Bike.kgCoefficient of Rolling Resistance. Wooden Track0.001Smooth Concrete0.002Asphalt Road0.004Rough but Paved Road0.008Slope.Rise/Run (decimal)Power.watts yields an estimated speed of 9.4 m/s. That's close to your time over 10 miles (unless I screwed up the math).
rmur
Thanks for that rmur, that's interesting. Tacx do claim that the i-magic is as close to real life cycling as a turbo trainer can be.
