Questions and CORRECT Answers
Lift off speed - CORRECT ANSWER - 1.2 Vso
Forces present during takeoff - CORRECT ANSWER - Thrust, drag, friction
How does thrust affect takeoff? - CORRECT ANSWER - Thrust decreases as velocity
increase - because of a change is airflow vector
How does drag affect takeoff? - CORRECT ANSWER - Initially have Dp (forcing air to
change direction) and then lots of Di and Dp
Why does friction affect takeoff? - CORRECT ANSWER - Due to rolling resistance of the
tires
Does frictional force, during takeoff, increase or decrease as velocity increases - CORRECT
ANSWER - decreases
Rank the order that has high rolling resistance value to low in terms of surface runway conditions
- CORRECT ANSWER - Dry concrete (0.7), light rain (0.5), heavy rain (.3) snow/ice (0.2-
0.1)
What is the definition of friction Coefficient (rolling resistance) - CORRECT ANSWER -
The percent of net weight that can be converted to frictional force, wheels not entirely locked.
How do aircraft maximize acceleration in takeoff? - CORRECT ANSWER - Increase
thrust, reduce drag, reduce weight, increase weight