The POH in my 1990 M20J-AT calls for 15 degrees of flaps on takeoff. I've also noticed that climb performance is greatly increased upon raising the flaps.
SureCheck doesn't make a checklist for the M20J-AT, but they do have one for the M20J MSE. That checklist allows for a range in takeoff flap settings from 0 degrees to 15 degrees. However, does the POH in newer M20Js agree with SureCheck on this?
I really do like the performance and acceleration differences in operating with 0 degrees of flaps versus 15. Obviously there are stall speed differences, etc.
Let me know if yall have any info on this, as well as your experiences with climb rates, etc. with and without flaps.
For what it's worth, I'm getting 500-600'/min while accelerating slowly to Vy, whereupon raising the flaps I get 900'/minute. And this is in Texas late afternoon heat with full fuel and a passenger. There is always the delay in the VSI that I need to make sure I'm taking into proper account.