T-34 Questions - Aircraft Terminology

Question 1

Define airplane.

Answer 1

A heavier-than-air fixed-wing aircraft that is driven by engine-driven-propellor or a gas turbine jet and is supported by the dynamic reaction of airflow over its wings.

Question 2

What type of construction is used in the fuselage of the T-34C? Why?

Answer 2

the T-34C uses a semi monocoque fuselage consisting of stringers, transverse frame members, and the skin.

Question 3

What variety of wing has no external bracing?

Answer 3

Full cantilever

Question 4

What control surfaces are attached to the wing?

Answer 4

ailerons

Question 5

What control surfaces are attached to the empennage?

Answer 5

rudder and elevator

Question 6

What control surface is used for longitudinal control?

Answer 6

elevator

Question 7

What is the primary source of directional control?

Answer 7

rudder

Question 8

Define airplane center of gravity.

Answer 8

The CG is the point at which all weight is considered to be concentrated.

Question 9

List the three airplane axes and the motions that occur about each.

Answer 9

longitudinal/roll, lateral/pitch, directional/yaw

Question 10

Define wingspan.

Answer 10

The length of the wing measured tip to tip.

Question 11

What is the difference between chordline, chord, tip chord, root chord and average chord?

Answer 11

The chord line is an imaginary straight line drawn through the leading and trailing edges of the airfoil. Average chord is the geometric average of every chord from the root to the tip. Tip chord is the length fo the chord at the tip. Root chord “”

Question 12

Define wing area, and state the formula for calculating it.

Answer 12

The apparent surface area of the wing from tip to tip including the area with in the fuselage and nacelles. S=bc

Question 13

Define taper, taper ratio, and sweep angle.

Answer 13

Taper is the reduction in the chord from the wing root to the tip. taper ratio is the ration of the tip chord to the root chord. Sweep angle is the angle between a line drawn 25% aft of the leading edge and a line parallel to the lateral axis.

Question 14

What is aspect ratio? What type of aspect ratio would you expect to find on a B-52 bomber? A high performance fighter?

Answer 14

The ratio of the wingspan to the average chord. A B-52 bomber would have a high aspect ratio. A high performance fighter would have a low aspect ratio.

Question 15

Define angle of incidence. Can the angle of incidence ordinarily be changed?

Answer 15

The angle formed between the chordline of an airfoil and the longitudinal axis of the airplane. It is fixed in most airplanes.

Question 16

Define wing loading and state the formula for calculating it.

Answer 16

The ratio of an airplane’s weight to the surface area of its wings. WL=W/S

Question 17

Define dihedral angle.

Answer 17

The angle between the spanwise inclination of the wing and the lateral axis..