When you trip a boundary layer you change types of drag and sometimes you get better performance with turbulent flow, i.e. a golf ball is dimpled to trip the flow which keeps the flow more attached and reduces the net overall drag. On this particular model with the Reynolds number it operates at I couldn't say if you would gain anything by tripping the flow or not. A good airfoil and light construction are probably your best bet. Also even on a perfectly smooth flat plate the flow will switch between laminar and turbulent at some point, unless the flow is very slow.
It's been a few years since I've touched this stuff, but that seems right.
Originally Posted by dcastle
Michael NAR# 89304
Somewhere, something incredible is waiting to be known. — Carl Sagan