negative dihedral

on 6/4/2008 9:54 PM Bertie the Bunyip said the following:
Rich Ahrens wrote in news:484753e0$0$76834
:

on 6/3/2008 10:35 PM Bertie the Bunyip said the following:
I think there have been a couple of straight wing airplanes wiht
anhedral, but I can't picture one off the top of my head. Surely
everything that can be tried, has been tried at this stage!
The Lockheed F-104, perhaps?


Yep, dats one. i have no idea what the anhedral does on that, but I'm going
to take a blind stab at area rule.

The usual, I think - Dutch roll control. The vertical fin was almost as
long as the wings.

Rich Ahrens wrote in
. net:

on 6/4/2008 9:54 PM Bertie the Bunyip said the following:
Rich Ahrens wrote in news:484753e0$0$76834
:

on 6/3/2008 10:35 PM Bertie the Bunyip said the following:
I think there have been a couple of straight wing airplanes wiht
anhedral, but I can't picture one off the top of my head. Surely
everything that can be tried, has been tried at this stage!
The Lockheed F-104, perhaps?


Yep, dats one. i have no idea what the anhedral does on that, but I'm
going to take a blind stab at area rule.

The usual, I think - Dutch roll control. The vertical fin was almost
as long as the wings.


Mm. Dunno. The fin would be neccesary because of the center of pressure
change anyway. You're right though. anhedral would dampen any high
speed dutch roll tendencies by reducing the alpha on an advancing wing.,
but the rules for things like that with razor thin wings get a bit weird
anyway. Trans-sonic it shouldn't have many issues anyway since
compressibility is dealt with by the airfoil, but you're probably right.
Its a shame. I was flying with a former aeronautical engineer the other
day and could have asked him.



Bertie