On Tuesday, August 13, 2019 at 9:55:44 AM UTC-7, wrote:
On Tuesday, August 13, 2019 at 6:09:24 PM UTC+2, Tom Kunich wrote:
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.

They are all calibrated Tom.


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.

Almost 46 km/hr into a headwind of 32 km/hr for 16 km? Indeed you a Pro level material Tom at your age. Hat off.


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

Rear hub power meters don't take drive train losses into account. I put my money on well calibrated crank or pedal based power meters.

Lou

For three of those miles I was not directly into the wind but quartering into it. And this is a top line performance. I only do something like that very rarely and not every ride like pros do. This is the difference between a Cat 1,2 or 3 and a pro. Anyone that rides enough can have a good ride. It is having a good ride ALWAYS that sets the pros apart from the amateurs.