British
Human
Power
Club

 

3D Tufts

First tests on the new racer showed a large area of erratic air flow over the boot.

By adding a short length of ”Townend Ring” corrected the air flow, but at what cost.

Roll down tests suggested no gain or loss ,even a smaller wing made no difference.
 
So a new test with tufts set at a distance from the surface which seemed to show

that it is only surface that is a problem, so not perfect but it will do for now.

 

Mike Burrows