I've been checking some of my flight training books about doing forward slips and flaps. Here's what Kerschner's Flight Instructor's Manual says:
The two main reasons you should avoid letting the student put the flap-equipped airplane into a forward slip in the presolo period are: (1) .... .. (2) airplanes with flaps extended may have bad reactions to excessive cross-controlling and an accident could result (or at best he could scare himself on one of his early solo flights). Some planes have placards forbidding deliberate slips with flaps extended. .
He goes on to explain how to do it and, as I also learned, tells that you apply aileron first and then the rudder.
Interesting how the views about it varies.
Glider plane training comes in handy when learning to slip
Westy
P.S. I'll continue checking my other books.....
