Bingo !!, found the answer hidden away in the depths of my C172 POH.
In the placards section it states 'Near flap indicator- "Avoid slips with flaps extended"'
Very nice but why ? most people would ask. If I've got an engine failure and need to get down into the only suitable field, you can bet your ass I'm going to sideslip with full flap if I have to. It would be nice to know what to expect though.
Fortunately if you then carry on through to the normal procedures section and read the bit on crosswind landings all is revealed.
It states the following -
"If flap settings greater than 20Deg are used in sideslips with full rudder deflection, some elevator oscillation may be felt at normal approach speeds. However, this does not affect control of the airplane"
Nice one, if that's the case then I'll be taking my chances with the oscillations in an emergency !!
I did wonder about the answer I gave in my previous post though. I definitely read somewhere that some bloke had tried it and that he said it was rudder blanking he had problems with ??
However I've been racking my brains and scouring my ATPL notes trying to find a way that would be possible and I cant think of one so he must have been talking balls.
Elevator Blanking is your answer then, I think I'll go and give that a try tomorrow if the weather is half decent, will be nice to try something new for a change !!
Regards
UA