View Single Post
Old Feb 04, 2013, 02:05 PM
BMatthews is online now
Find More Posts by BMatthews
B for Bruce
BMatthews's Avatar
The 'Wack, BC, Canada
Joined Oct 2002
12,803 Posts
Tom, while such a thing could be made to work it would be a draggy sort of solution. Which is why either reflexed airfoils or tailplanes are used instead. These other solutions generate the required pitching moment with less drag involved.

There was an interesting little test concept glider that used to be printed in a lot of the old Solarbo adverts in Aeromodeler. I've attached a sketch of how I remember it below. It wouldn't take much to make the wing from some 1/32 sheet with a modest amount of camber courtesy of a few simple arc shaped ribs to give the wood about 3/32 of camber and see how it works out. 3/32 camber over 2 inches would be roughly 4.5% camber.

Then make the same model that has a curled wing of 1/32 that has 3/32 camber at around 1 inch back and some reflex over the last 1 inch. Use the same swept forward fin with no drag plate. See which has the better glide ratio.
BMatthews is online now Find More Posts by BMatthews
Reply With Quote