On Monday, August 12, 2019 at 5:35:48 PM UTC-7, Claus Aßmann wrote:
Tom Kunich wrote:

10K I have generated as much as 400 watts over that distance

So you can _average_ 400 W for 16 kilometers ("10K") (i.e., for
about 25 minutes)?
How did you measure that power output?

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You measure that output by weight, approximated frontal area, wind speed and time for the distance. Power meters cannot give you a more accurate reading than that. In fact, the most common power meters are built-in to cranks. Aside from the fact that most only read directly from half a crank, they also do not read accurately for actual power. They read via distortion of the cranks meaning that you have to have precise control of the metallurgy and perfect installation angle.

For instance, last year I did 10K into a 20 mph wind in 21 minutes. The combined weight was 94 kg and the frontal area about .79 meters^2.

The only real accurate power meters are rear hub mechanisms which can be fully machined so that every component is as accurate as possible.

To underscore this - PROS do not produce this level of power for 10K - they can do it for 100K. It is not unusual for normal riders to put out a great deal of power for relatively short distances. Cat 2 and 1 racers put out phenomenal power in criteriums. There are several videos on YouTube that have both the bar camera and a power overlay that are shocking. 1200 watts out of every corner and 1600 watts in the final sprints. 600 watts between corners. The accelerations are what really burn up the power.