They're calling me on Friday to remote into my system and take a look.
I'm pretty sure now that my resistance unit is very poorly calibrated, as my new Powertap passed a static weight test perfectly and reads about 80% of the power the Bkool reports on every run I've tried, no matter how I set it up.
My Bkool seems to give the same figures as you guys at 10mph, 20mph, etc. on the flat, and since those who've tried it with their power meters (a powertap and a KICKR with built in power meter) also show the same, I'm left with the only conclusion being that the resistance the unit is not putting out the resistance it should.
I would say that the bkool software calculates how much resistance is required depending on assumptions for aero drag, rolling resistance and your programed weight, any wind, gradient, etc. and then tells the unit to apply the level of resistance required. Since my powertap speed agrees perfectly with the speed/cadence sensor and the bkool speed display, I seem to be doing the 10mph, 20mph or whatever, but if the actual power being produced is c.20% less than the bkool display, the only answer can be that the resistance bkool is using in it's calculations is not actually being delivered to the wheel. There is no way for the bkool software to know that the correct resistance is being applied, as it has no inbuilt power meter, it just uses speed and resistance to calculate the power figure, and if the resistance is wrong, the power figure will be wrong. Another advantage of the KICKR, which has a power meter built in.
So if they calibrate it properly, the resistance will get stronger and I will have to pedal harder to maintain the same speed, bringing up the power figures on the powertap to match the bkool calculations.
Then I'll no longer be able to keep up with you lot, but will excuse myself by claiming that all your trainers are poorly calibrated ...
So if you suddenly see me demoted back to Amateur you'll know they've fixed it!
Geoff