You are reading a single comment by @gbj_tester and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
gbj_tester
Drag cofficient (Cd) is not a constant. It depends on size and speed (reynoldsnumbers and so on...). At bike speeds, Cd for different shapes (including airfoils) are much higher than for airplane/car speeds.
Model airplane aerodynamics seems to be the closest match for bikes.