General Performance

Question 1

For a given airplane, aerodynamic considerations usually include ____.

Answer 1

1. AoA
2. Sideslip
3. Mach number
4. Reynolds number

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 71

Question 2

The thrust and power characteristics of the power plane of a given aircraft generally depend on _____.

Answer 2

1. Altitude
2. Flight Velocity
3. Engine operating conditions

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 71

Question 3

The term C_D_0 is often referred to as _____.

Answer 3

The zero-lift drag coefficient, or the parasite drag coefficient.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 71

Question 4

The equation that gives the variation of drag coefficient is often called ______.

Answer 4

The Drag Polar.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 71

Question 5

At low speeds, C_D_0 includes_______.

Answer 5

Skin friction and pressure drag of all wetted components of the airplane.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 6

For high subsonic or supersonic aircraft, C_D_0 can also include ______.

Answer 6

Wave drag.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 7

What is the wing planform efficiency factor (e) when the lift distribution is elliptical?

Answer 7

e =1

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 8

What is the Oswald Efficiency Factor?

Answer 8

For a complete airplane, the wing planform efficiency factor is modified to account for the variation of skin friction and pressure drag coefficient with angle of attack.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 9

Propulsive characteristics of the propeller airplane are normally given in terms of ____ & _____.

Answer 9

1. Power developed by the piston engine
2. Propulsive efficiency of the engine prop combination.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 10

Performance characteristics of a jet airplane are normally specified in terms of ____ & _____.

Answer 10

1. Thrust available
2. Thrust required

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 72

Question 11

For a given altitude, the power developed by a piston engine is ________ with flight velocity.

Answer 11

Virtually constant

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 73

Question 12

For a fixed pitch prop, propulsive efficiency generally varies with _______.

Answer 12

Flight velocity.

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 73

Question 13

If an aircraft is equipped with a variable pitch, constant speed propeller, the efficiency is _______ over the operating speed range.

Answer 13

Assumed constant

Ref: Pamadi, Performance, Stability, Dynamics, and Control of Airplanes, Pg 73