3 ms·
If the gears are 62:12 twice, would it be correct to say the final ratio is equivalent to 31:3?
by antongribok 8y ago
If the gears are 62:12 twice, would it be correct to say the final ratio is equivalent to 31:3?
- schoen 8y agoNo, when you put gear ratios in series, they'll multiply rather than adding, so it's rather equivalent to 3844:144, or in least terms 961:36.
- userbinator 8y agoMore simply, it's a ratio of ~26.7:1 --- the wheel turns approximately 26.7 times for each turn of the crank. Using some of the other numbers mentioned here, we can calculate that at her top speed of 296km/h she was pedaling at ~126RPM, and the wheels of the bike spinning at ~3377RPM. If we knew the torque, or alternately the "stroke" of the crank and the average force she was exerting, we would also be able to find out her power output in W or HP. Edit: some searching around reveals that 120-130RPM is usually where peak power is for cyclists, which corresponds with roughly where she was at top speed: https://www.ncbi.nlm.nih.gov/pubmed/17562069 https://www.ncbi.nlm.nih.gov/pubmed/17562069 ...and it makes me wonder if she had another gear, would she be able to keep accelerating beyond that. She would've probably been producing 1-2HP at that speed.