Larry Dighera wrote

Message-ID:
Actually the best turnaround bank angle (least altitude lost per
degree turned) is slightly above 45 degrees.

Note that all of Lowery's discussions deal with minimizing altitude
loss during a "loss of power return to the field". This is not the
same as minimizing turn radius in a canyon where altitude loss may
not be a factor and where power is still available to maintain air-
speed during the high-g turn.

Once again, I did not post post anything about a "return to the field"
but simply quoted a highly respected aerodynamics text with regard to
minimizing turn radius.

Bob Moore