Aircraft Performance

Question 1

Which factor would tend to increase the density altitude at a given airport?

Answer 1

An increase in ambient temperature.

Question 2

If the outside air temperature (OAT) at a given altitude is warmer than standard, the density altitude is

Answer 2

higher than pressure altitude.

Question 3

WEIGHT ARM MOMENT
(LB) (IN) (LB-IN)
Empty weight 1,495.0 101.4 151,593.0
Pilot and passengers 380.0 64.0 –
Fuel (30 gal usable-no reserve) – 96.0 –
The CG is located how far aft of datum?

Answer 3

CG 94.01.

Question 4

What effect does high density altitude, as compared to low density altitude, have on propeller efficiency and why?

Answer 4

Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes.

Question 5

What effect, if any, does high humidity have on aircraft performance?

Answer 5

It decreases performance. (An increase in air temperature or humidity, or a decrease in air pressure (which results in a higher density altitude) will significantly decrease both power output and propeller efficiency. If an air mass is humid, there is more water in it, therefore, less oxygen.)