Course : Introduction to Experiments in Flight Assignment 1

Course : Introduction to Experiments in Flight Assignment 1

1. For the given figure , where 𝑥₁, 𝑥₂, 𝑥₃ are distance from ref line and 𝑅₁, 𝑅₂, 𝑅₃ are the reaction forces at points A, B, C .The CG of the aircraft is given as

a. 𝐶𝐺 = (𝑅₁+ 𝑅₂+ 𝑅₃)/(𝑥₁𝑅₁+ 𝑥₂𝑅₂+ 𝑥₃𝑅₃) b. 𝐶𝐺 = (𝑥₁𝑅₁+ 𝑥₂𝑅₂+ 𝑥₃𝑅₃)/(𝑥₁+ 𝑥₂+ 𝑥₃)

c. 𝐶𝐺 = (𝑥₁𝑅₁+ 𝑥₂𝑅₂+ 𝑥₃𝑅₃)/(𝑅₁+ 𝑅₂+ 𝑅₃) Ans C

d. 𝐶𝐺 = (𝑥₁+ 𝑥₂+ 𝑥₃)/(𝑅₁+ 𝑅₂+ 𝑅₃)

2. The airspeed indicator in aircraft gives

a. True Speed

b. Equivalent Speed Ans B

c. Ground Speed d. None of these

𝒙_𝟑 𝒙_𝟐

𝒙_𝟏

𝑹_𝟐 𝑹_𝟑

𝑹_𝟏 𝑨

𝑩 𝑪

𝒓𝒆𝒇 𝒍𝒊𝒏𝒆

3. True speed (𝑉_𝑇) of an aircraft at an altitude (h) meters above sea level in terms of Equivalent speed (𝑉_𝐸) is given as (where 𝜌 is density)

a. 𝑉_𝑇 = 𝑉_𝐸

b. 𝑉_𝑇 = √𝜌_ℎ/𝜌_{𝑠𝑒𝑎 𝑙𝑒𝑣𝑒𝑙} 𝑉_𝐸

c. 𝑉_𝐸 = √𝜌_{𝑠𝑒𝑎 𝑙𝑒𝑣𝑒𝑙}/𝜌_ℎ 𝑉_𝑇

d. 𝑉_𝑇 = √𝜌_{𝑠𝑒𝑎 𝑙𝑒𝑣𝑒𝑙}/𝜌_ℎ 𝑉_𝐸 Ans D

4. In the experiment to estimate the drag polar the equation is in the form of 𝑌 = 𝑚𝑋 + 𝑐. The value of 𝑚 is calculated using

a. 𝑚 = 2𝐾𝑊²/𝜌𝑆²

b. 𝑚 = 𝜌𝑆𝐶_𝐷0/2 Ans B

c. 𝑚 = 𝑆𝐶_𝐷0/2𝜌

d. 𝑚 = 2𝐾𝑊²/𝜌𝑆

5. In the experiment to estimate the drag polar the equation is in the form of 𝑌 = 𝑚𝑋 + 𝑐. The value of 𝑐 is calculated using

a. 𝑐 = 2𝐾𝑊²/𝜌𝑆² b. 𝑐 = 𝜌𝑆𝐶𝐷₀/2

c. 𝑐 = 𝑆𝐶_𝐷0/2𝜌

d. 𝑐 = 2𝐾𝑊²/𝜌𝑆 Ans D