Using the given airplane in figure 1.11 Typical Lift Characteristics, what TAS and ANGLE OF ATTACK will this airplane stall at with the following conditions:

Question

At standard sea level conditions at 18,000 pounds?

At a density altitude of 20,000 feet at 18,000 pounds ?

Answer 1

1Understand that weight is a measure of the force due to gravity acting on an object. The weight of an object is given by the formula:

W=m⋅gW=m⋅g

where WW is weight, mm is mass, and gg is the acceleration due to gravity.

2Since the weight of the object is given as 18,000 pounds, we recognize that this value does not change with altitude. Therefore, at both standard sea level conditions and at a density altitude of 20,000 feet, the weight remains the same

3The question may imply a need to consider the implications of density altitude on aircraft performance, but since the weight itself does not change, we conclude that the weight remains constant

Final answer:

The weight remains 18,000 pounds at both standard sea level conditions and at a density altitude of 20,000 feet