"Brock" a écrit dans le message news:
...
I feel there is a real advantage to the use of slats and flaps in
order to have things happen slowly during landing and yet still have a
good cruise speed. Of course the problem is in the complexity and the
extra weight. For rails I was thinking about something like standard
kitchen drawer rails or perhaps a tube within a tube design. I
wouldn't think their would be a lot of force on the slat at low
takeoff speeds so the structure wouldn't have to be bullet proof,
their would probably be a lot more force on the flaps though. I
haven't been able to find information if the necessary airplane
hardware is available commercially, perhaps it would have to be custom
made. Any ideas on how to go about building something like this?

Brock

I fear that if flaps has some aerodynamic effect, they HAVE to be bullet
proof.
Just imagine what could happen in cas of disymetrical openning. Or one side
flap locked in landing configuration, the other side retracting. I dont
think aileron whould have enought authority to overcome the roll.

And for fowler flaps, I unterstand it is the ones that go aft before
rotating.

What about ordinary rotating flaps, but with a very low rotation points. Say
rotation point one feet below the wing. at 45° extention, the leading edge
of the flap would be (sin (45°)) aft. No need for rails. A bunch of slotted
flaps on certified planes just act like this.

Other point to consider a
-Tail should have enough authority to compensate the pitching moment.
-your plane should have enough power to have a positive climb rate, at full
load with flaps, fowlers, landing gear fully extented.