I would suggest taking any type of light single you fly, take it high, preferably with an instructor or experienced safety pilot, and glide down, slipping it even as far as full rudder deflection in each direction. Note to avoid spinning and killing yourself - KEEP THE SPEED UP, and treat the ASI with caution (it may under-read).
Tried this recently with a high-hour "student" (was retraining from lots of experience stateside - I learnt there under a very good instructor, why can't they all teach what he taught me? Why is there so much bad training of Europeans out there, when much of the FAA training is quite good?) who really had never been shown the sideslip. Very useful exercise, especially in a Robin 200 (tiny flaps, maximum 20 degrees).
High-wing - if you can get to the other side of Hampshire I'd be delighted to show you.
TonyR
I could show you what can be done by way of angle of descent with sideslip but little flap.