On Wed, 28 Sep 2011 21:23:39 -0700, Beryl wrote:

wrote:
...
And some planes have "flying tails" that constantly provide positive
lift in level flight - while other planes have "reverse flying tails"
that contantly provide down-force in level flight. Just look at the
airfoil configuration of the rear stabilizer/elevator on, say, a
Zenith 701 and compare it to, say, a cessna 172.

The 701 does not have a lifting tail. You're nuts.
The 701 tail pushes down to hold the nose up, just like the 172 tail does.

I see on their website
http://www.zenithair.com/stolch701/7-design-tail.html
they're calling the stabilizer an "inverted stabilizer". Just silly words.
No, you need to understand how an airfoil works - then LOOK at both
the Cessna and the Zenith. The Cessna has the camber on the top - and
the bottom is flat. The airfoil causes LIFT in the upward direction.
The 701 has the camber on the bottom - and the top is flat - meaning
the LIFT is in the DOWNWARD direction. Forget about angle of attack
and just look at the AIRFOIL. The airfoil creates lift on the side
that accellerates the air-flow - following Bernouli's principal.

It is plainer than the nose on your face when you know what you are
looking for. But you are RIGHT - the 701 does NOT have a Lifting tail
- but the Cessna DOES.