I am trying to calculate the power needed to hold a steady speed on an indoor trainer, so as I can train using power in watts. I set the bike up and put the crank at 90 degrees, then put a weight of 2.695kgs on the pedal to overcome the resistance, just on the verge of moving. The faster you pedal the more power is needed.
The crank length is 175mm The weight to overcome resistance is 2.695 kgs (converted to Newton’s 26.429) Cadence is 80 rpm