"Ramapriya" wrote in message
oups.com...
I've always seen spoilers and flaps being deployed fully upon landing.
While the reason for spoilers is straightforward, I haven't yet figured
why flaps are deployed too.

Flaps only improve lift to a point. Even on the little planes, past that
point they simply add drag.

So yes, what you're seeing is the use of flaps to create a lot of drag. The
spoilers accomplish that too, and at the same time "spoil" the lift the wing
might otherwise create (with or without the flaps).

How much of each does what, I can't say. Suffice to say, with spoilers and
flaps fully extended, there's LOTS of drag, and very little lift.

Pete