Ok, what if one of the wings is a canard? If the elevator pushes down to
support the nose, and a canard lifts, doesn't that make a canard more
efficient?

Al


"Bert Willing" wrote in message
...
The main idea of long wings is to reduce the relative part of the wingtip
vortexes in the total amount of the drag.
Having 4 vortexes instead of 2 certainly doesn't help.


"Jono Richards" wrote in
message ...
A thought came to me the other day...

Now, I have never seen a bi-wing glider, but was thinking,
could a bi-wing glider of, say 15m wingspan, effectively
have 30m performace?

This is probably a stupid uneducated question, and
I would imagine that it hasnt been done because it
wouldnt work! But its certainly something I am interested
in.

Think of it...a bi-wing ETA giving a total of 60m performance!


JR