This is an interesting story that is probably popular among those in the aerospace community on how flaps help provide lift.
During the World War II, a C-87 cargo plane (pic above) was all set to take off from Agra airport, India. The pilot had specifically asked for a small load of fuel for takeoff.
(because the C-87 did not climb well when heavily loaded )
But the ground crew accidentally filled it to its full capacity and forgot to tell the pilot about it.
The pilot realized this only halfway through the runway and was already committed for take off.
With a three ton overload on the plane, the plane was heading for a fatal crash with one of the towers of the Taj Mahal which was being repaired at that time and was swarming with workmen.
The pilot gave full throttle but it still refused to rise up.
And in a desperate attempt, he lowered the flaps fully and instantaneously the plane ballooned upwards.
Surely, it lost some of its forward speed due to the increased drag. But it comfortably cleared the famous tomb, averting an impending disaster. So yeah, flaps on an airplane are no joke.
Have a great one!
*** Stories are great at linking words with experience. And this aids a lot in the learning process.