Originally Posted by
TheRealDrPhil
The physical (physics) models for bicycles make gross assumptions about mass and motion in order to offer simple explanations according to simple rules or laws. The dynamics of riding a bicycle in reality present the rider with a much more complicated experience not reflected in the simple models of motion.
Sadly, the data don't support this. If the model,
http://www.recumbents.com/wisil/Mart...%20cycling.pdf were truly lacking, the agreement between model predictions and measurements would show it. To date, no such discrepancies have been found.The success of the virtual elevation method,
https://wallace78tria.files.wordpres...direct-cda.pdf is further proof of the accuracy of the model.