Talk:Flap (aircraft)

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Flaps may also be used when taking off - perhaps this should be mentioned.

This has been taken care of. Jadias 19:03, 11 January 2007 (UTC)

Someone eliminated the increase in lift coefficient (and therefore lift force via L=½ρSCL) due to flap deployment on takeoff. Someone said that flaps don't increase the lift force, only the lift coefficient. If flaps change CL, they must change the resulting force (see the equation). Their argument is L = W. This is ONLY true for steady level unaccelerated flight. It is possible for aircraft to accelerate, else they wouldn't get anywhere! Thus, there is the "ballooning" effect on flap deployment, caused by an increase in lift force (yes, I said force). 128.211.248.83 00:58, 26 September 2007 (UTC)