Will, that's Libby watching --
I will be reading and hear a slight noise -look down and there is that fixed gaze --
Gringo - do not confuse our model foils with the text book efficiency generalizations for airfoils developed for man carrying machines - .
The foil in the sizes we use really means little -unles *** isdeveloped for a given load and speed.
for rip **** tear around flying - square edges and flat foils work fine -
What makes the big differences?
wing loadings and power -