Mxsmanic wrote:

Every reference I've checked says so. They sink at a variable rate, but
usually at least 150-200 feet per minute, sometimes much more.

Note that we were talking about turns at either 45 or 60 degrees bank; with
a typical trainer flying at, say 90 or 100 knots, a 360 would be completed
under say, 35 or 20 seconds respectively. Now, if your numbers of 200
feet per minute are correct (and don't take it personally if I have my
doubts), the turbulence would have gone down, by about 115 and 67 feet
respectively. Considering that the acceptable range of error in the PTS
for a private certificate is +/- 100 feet (for a 45 degrees of bank), it
is indeed possible to bump into your own turbulence, even using your
numbers.

--Sylvain