(Bob Kuykendall) wrote in message
snip
My HP-24 project is slated to have a standard 15 meter span, with
extensions to 18 meter, including aileron extensions. The gross
weights will be different, but the speeds will be pretty much the
same.

Bob K.


As Bob knows, my Nimbus 3 has 22.9m, 24.5m and 25.5m tips for the
various wing span I wish to fly with. Choice is driven by weather
(lift) conditions and desired wing loading for the day. I also have
positive and negative flaps - as do all or most flapped sailplanes. We
also put hundreds of pounds of water in our wings on good days, but
that would not be recommended for powered aircraft ;-).

Are there any powered aircraft out there with negative flap positions
for faster cruising/lower drag?

There was a sailplane built some years ago with a telescoping wing - I
recall it worked OK, but was not successfull.

Jim