On Wed, 13 Dec 2017 21:50:57 +0100, Andreas Maurer wrote:

Several causes:
- mainly wing tip clearance: The wing tips are far behind the landing
gear and dihedral is only 2 degrees, they come down when the nose goes
up, creating ground clearance problems

I didn't think of that.

- with the wing out of the way lots of space for a really strong nose
gear (one of the famous weak points of the SB-13)

OK

- the wing spar is now over the knees of the pilot, leaving plenty of
easily accessible space for the controls, mixer and Haenle-type stick
between wing spar and instrument panel

Nice.

What I'm referring to can be seen on the SB-13:
http://www.airport-data.com/aircraft...00724103.html#

Look at the little red wing fences - afaik they had to be intruduced to
tame handling (stall?) characteristics.

OK, understood.

BTW:
This is the project page of the AK-X 1/2 model:
https://akaflieg-karlsruhe.de/tag/12-modell/
On the spin onboard video you can nicely see how the inner flaps work as
elevator.

Yes I found that this morning. Must be new: I've visited that page before
but don't recall seeing it then.

Fascinating to watch those inner flaps thinking they're on a canard!



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