P3 4 Not so Flappy: Will it Take Off?

Abstract

This paper investigates the impact of flaps that are used on aircraft during take off, in particular
for a Boeing 737 − 800. It compares typical take off flap settings, to not using flaps, each setting
producing a lift coefficient of 2.1 and 1.4 respectively. Velocities that generate sufficient lift for
flight to be possible, for each setting, are found to be (v2.1 = 69.4ms−1 and v1.4 = 85.0ms−1
). A
net thrust, that accounts for drag on the aircraft, is found for each respective lift coefficient setting
(F2.1 = 220kN, and F1.4 = 225kN) and consequently respective accelerations (a2.1 = 2.78ms−2
,
and a1.4 = 2.85ms−2
) are calculated. It is found that not using flaps on this aircraft results in a
take off distance 404m longer than when they are used.