Do a search on this and you will find quite a bit of discussion on this. If you use flaps use 10 deg. But don't forget to retract them.Curious to know how many 9 / 9A drivers use flaps for takeoff. If so how much flaps and what are you thoughts on takeoff flap usage.
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and only when there is a reason I need to do a harrier takeoff.
I would bet that you would get better performance in the same situation if you were to use 10 deg instead of FULL flaps. With full flaps the excess drag exceeds available excess lift generated by the flaps by a significant margin. Enough so that overcoming that drag is being done by shear brute force of the HP generated at the prop. 10 deg is a balance between drag and lift that gives the best lifting performance with the least amount of drag induced in a 'take off' setting.On several (very rare)occasions I used full flaps on take off. OAT well below freezing, 10 gallons in the tanks. She jumped up indeed
I fly a 7 and not a 9 but have the same question. I find that if I use the flaps during a takeoff, I accelerate so fast that I can't retract tham fast enough to not overspeed them.
To complicate matters, I have the VP-X set to not allow the flaps to deploy above 100k and they will not retract above 100k either. Need to figure out how to change that. I want to be able to retract at any speed.
I've never known of an airplane where full flaps are recommended for takeoff. A performance killer.
I like that quote Rick can I steal it?
On several (very rare)occasions I used full flaps on take off. OAT well below freezing, 10 gallons in the tanks. She jumped up indeed
Only for soft field takeoffs, and then only 10 degrees.
Pull the nose higher! Aren't you flying an air speed in this condition?I fly a 7 and not a 9 but have the same question. I find that if I use the flaps during a takeoff, I accelerate so fast that I can't retract tham fast enough to not overspeed them.