Originally Posted by
p2templin
If I understand your question correctly, our solution is dependent on the ICS. With ICS, each bottom bracket spindle is only handling one rider, so each Quarq is only measuring one rider. All measurement is done before the power is summed at the ICS intermediate driveshaft.
It would be very interesting to determine what would become of the power measurements on your bike, if the ICS could be bypassed, and the cranks joined conventionally with a sync chain. How would the captain's power transmitted through the stoker's spindle affect the measurements taken the in stoker's CinQo spider?
It is, however, a moot point. In a few short months, the Garmin Vector and Polar/Look pedal based power meters will be available, and if these work out, they will be the obvious choice for tandems, as the pedal spindle strain gauges will be isolated from the tandem sync drive peculiarities, and they can be easily transferred to owner's half-bike as well.