In the latest Bicycling mag they have a small article on aerodynamic testing as done at the wind tunnel at MIT, Cervelo being one of the chief consumers of this data.
The highlights:
-Wearing a non-aero helmet vs. an aero helmet is worth 4x the drag as non-aero wheels vs aero wheels;
-Wearing gloves causes as much extra drag as a non-aero front wheel over an aero front wheel;
-Water bottle on the seat tube is more aero than no water bottle on the seat tube;
-WB on the down tube is worse than no water bottle;
-rider contribution to drag about 75-85%, bicycle roughly 15-25%. Not much to work with for the bicycle.
Source: Bicycling Magazine
The highlights:
-Wearing a non-aero helmet vs. an aero helmet is worth 4x the drag as non-aero wheels vs aero wheels;
-Wearing gloves causes as much extra drag as a non-aero front wheel over an aero front wheel;
-Water bottle on the seat tube is more aero than no water bottle on the seat tube;
-WB on the down tube is worse than no water bottle;
-rider contribution to drag about 75-85%, bicycle roughly 15-25%. Not much to work with for the bicycle.
Source: Bicycling Magazine
