burnthesheep wrote:
Agreed, not necessary. It is just that if you dont enter a good total weight, accel and decel in elevation induced speed changes is miscalculated due to wrong weight. If speed is constant, obviously accel or decel is irrelevant to the calc of cda. So, if you hold constant speed you eliminate a source of error. Way I see it. Good to know about the rollout for that speed thing.
I loaded up GC tonight and results look much more constant. App is meh without GC. I’m on my way. Pretty good cda for flappy kit and road helmet with training wheels. Plenty to test in coming months.
A 1kg error on 1% incline will introduce about a watt of error at 36km/h. If you are doing out and backs will introduce no error for the whole of the segment (for altitude)
For accel/decel it will introduce a bit of error, but actually less than not including the moment of intertia of the wheels (I am not sure your device allows to configure). If you accelerate from 28.8 to 36km/h 1kg error will introduce 0.3watts over 60seconds.
Accurate weight is important, but rarely the major source of error in my runs. No need to re-weigh after you pee.
If Robert finds an error in my math, I'll blame it on the beer :-)