The RC model might have gotten too steep, in a normal flight pattern, but
I think what happened was that the overcast sky messed up the pilot's
orientation clues, and he banked steeper, rather that flattening it out.
I've done it, and about anyone who flies RC has also done it, and gotten
it back into control. With the model Buff, getting that steep put you
into an unrecoverable area of the flight envelope. Boom, was the final
result.
--
Jim in NC

Sorry to jump in here.

But as I recall the discussion at the time of the RC crash it was due to the
"dreaded downwind turn" that plagues some RC pilots at times.

But no matter the real reason the outcome is the same.

Les