On Sun, 20 Jul 2003 14:43:58 GMT, Dave Hyde wrote:

Roger Halstead wrote:

I guess you'd need some sort of plastic overlay for the airspeed
indicator to remind you of the new critial speeds.

They don't change all that much. You leave them set for the shorter
wing. ...

I think someone else said this too, and I find it confusing. If they
don't change that much, why have the extensions? Just for more fuel?

They can be used for additional fuel and they create a higher aspect
ratio for greater speed at altitude than the short wing.. They also
offer a bit more climb, and a bit slower landing.

OTOH although the landing is slower, fowler flaps and the extended
wing only lower the landing speed a few MPH

The airpseed indicator could certainly be marked that way
and inspectors may approve it, but it seems like the long-wing version
would be more critical for safety numbers. Vne would likely be lower

It's not. That depends more on other factors

for the long wing(*), and maneuvering speed will be lower as well,

It is by a little

assuming the extensions add any lift at all.

They do.

Stall speed for *both* wings is important.

Stall with the longer wing is only a couple MPH slower.

(*) Assuming it's flutter that sets Vne, which is a
big assumption.

Kinda, sorta...flutter is one. Various portions of the structure are
another. As

Roger Halstead (K8RI EN73 & ARRL Life Member)
www.rogerhalstead.com
N833R World's oldest Debonair? (S# CD-2)

Dave 'corner speed' Hyde