ORIGINAL: MX240

Hi Guys,
I test flew a friends T-28 with a OS 61 2-stroke and she flies fine....but while doing a nice big loop at the bottom she likes to snap roll badly.
Too slow a landings and a wing drops and drags the runway.
Landing with flaps are a lot better and really nice landings can be done.
Not sure where his C/G is....any one else haveing this bad wing tip stalling problem?
Jim