Take-off flaps
I forgot to set flaps before the second take-off in my -8. It was off the ground almost instantly and climbed steeply. Plane was light and it was about 32? OAT. An observer said he saw nothing but the bottom of the airplane. I had to hurry to get the flaps up before 100 mph IAS, or so it seemed. Tried no flap take-offs and found them more that adequate for any normal situation. Now I'll not use flaps unless runway is very rough or has loose gravel etc. Have only limited experience at max gross weight. More of that might suggest using some flap when very heavy. 69D has an IO-360 and CS prop. It's off the ground so rapidly and in such short distance compared to most aircraft that I doubt there's much need for flap use on TO. YMMV!