Bad practice to raise flaps in the turn. Reason is, you have very high lift devices deployed. raising them in the turn is a no no on a heavy or high performance jet. If you do raise them you are reducing this extra lift when you need it most. The loss of lift can be very sudden and could happen at the wrong time, if you hit a bumpy patch for example. The stall speed is being increased, (therefore the safety margin decreased), at the very time you dont want it the Vs increased.
I also have done my time in ag flying may years ago. As far as assisting the turn was concerned never used flaps as a rule. I always flew clean and fast but had the flaps as a backup if I thought I needed them, although not very often in my 10 years at it. That technique gave me the extra margin of speed. Speed is my friend.
The one exception was the DHC2 Beaver, on ag work.. It needed the flaps applied in a turn, every turn! IMHO
Just my 2 cents worth.
Last edited by weido_salt; 21st June 2010 at 22:08.