I think the poster meant that for that particular case the numbers
didn't change much. But in general, there aren't many parts of the
plane that effect performance more than the wing does. Produces
effectively all the lift and most of the drag.

Dave Hyde wrote in message ...
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?

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
for the long wing(*), and maneuvering speed will be lower as well,
assuming the extensions add any lift at all. Stall speed for *both*
wings is important.

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

Dave 'corner speed' Hyde