4 ms·
Some interesting info here. I have a Garmin speed sensor and a “dumb” mag trainer (CycleOps Mag). Given the trainers known resistance curve, I was thinking abou
by jdechko 6y ago
Some interesting info here. I have a Garmin speed sensor and a “dumb” mag trainer (CycleOps Mag). Given the trainers known resistance curve, I was thinking about trying to come up with a script to approximate power based on speed.
Basically I want a home brew alternative for Zwift and TrainerRoad virtual power.
- rconti 6y agoThat would be a cool project. Do you already know the resistance curve, or you're just saying SOMEONE knows it? I'd worry that it would be impacted by heat, but perhaps not significantly. I've got a Peloton, have a Stages power crank on my road bike, and previously had Favero Assioma power meter pedals (highly recommended product BTW). I ran the pedals on the Peloton for a few rides to get a feeling for how close the calibration was. (surprisingly close, in my case).
- jdechko 6y agoSaris (now owner of cycle ops) has an approximate graph on their blog. It’s probably not very accurate, but I could probably get close enough by taking some “known” points, some approximations and applying some math to the problem. The other option is to see if I can dig into the zwift or trainer road code. Both of those applications support “virtual power” for this specific trainer. Which is another way of saying that SOMEONE knows it. I’m sure that Saris actually shared the exact curve with Zwift and Trainer Road, but I’m not sure they’d share it with me.