Power output, speed, riding position calculator... decent?

http://www.kreuzotter.de/english/espeed.htm

How does this calculator stack up to the given understanding of output power vs. factors?
Opine please.

Thanks, Doug

 

"Doug" <[email protected]> wrote in message news[email protected]...
> http://www.kreuzotter.de/english/espeed.htm
>
> How does this calculator stack up to the given understanding of output power vs. factors?
> Opine please.

Almost all power calculators you find on the web are reasonably similar in the sense that the
power-speed relationships are very well known as long as one knows the proper inputs. The hardest of
these to know is the aero drag component (the gravity component is pretty easy, and the rolling
resistance component is pretty small).

The innovation of this particular calculator is that rather than have you input the drag coefficient
and area yourself (CdA), it internally calculates CdA from your height, weight, and bike position.
Since this part of the calculation is not visible (or at least, I couldn't find it), I can't comment
on whether it was properly implemented. However, it appears to give answers moderately consistent
with other calculators I've seen.