Hi I'm curious about the difference in drag between various surface finishes and the effect on speed.
For example would there be a "noticeable" difference in performance between a molded glider and the exact same model covered in Solartex ? and Solartex after a bit of scuffing from a few landings?
Is there a "friction coefficient" for different surface finishes?
I've tried Googling but most references are to technical for me or don't seem to apply at our Re numbers.