"kontiki" wrote in message
...
In theory of course. In the case of the 172 with 40 degrees of flaps they
contribute more drag than lift.

In practice too. The relative amounts of drag and lift are irrelevant to
the fact that using the flaps lowers the stall speed, and that doing so does
not make it any easier "to end up real slow in a slip".

Your assertion that "With full flaps its easy to end up real slow in a slip
and approach a stall" is just plain nonsense, and certainly has nothing to
do with the *warning* (not prohibition) against slipping while flaps are
extended (even if there were something to your claim about flaps making it
easier to stall).

Pete