021.02 AIRFRAME

Question 1

A framework of truss type fuselage is mainly used in (…).

Answer 1

A framework of truss type fuselage is mainly used in (light training aircraft)​.

Question 2

Number 3 in the attachment is the (…). Its function is to (…).

Answer 2

Number 3 in the attachment is the (skin). Its function is to (carry loads during pressurisation cycles)​.

Question 3

Number 2 in the attachment are the (…). Its function is to (…).

Answer 3

Number 2 in the attachment are the (stingers or longerons). Its function is to(absorb longitudinal loads (tension, compression) )​.

Question 4

Control surface flutter can be avoided by a (low/high) torsional stiffness of the structure and locating a balancing mass (in front of/behind) the control hinge.

Answer 4

Control surface flutter can be avoided by a (high) torsional stiffness of the structure and locating a balancing mass (in front of) the control hinge.

Question 5

A structure in which the skin takes all the load is a (…) structure.

Answer 5

A structure in which the skin takes all the load is a (monocoque)​ structure.

Question 6

Number 2 in a wing structure is (…). It’s function is to (…).

Answer 6

Number 2 in a wing structure is (the ribs). It’s function is to (provide aerodynamic shape of the aerofoil and carry various loads)​.

Question 7

Loads on the cylindrical part of the fuselage during pressurisation cycles are carried by the (…). The load is (compression/tension/bending/torsion).

Answer 7

Loads on the cylindrical part of the fuselage during pressurisation cycles are carried by the (skin)​. The load is (tension)​.

Question 8

Number 1 in a wing structure is (…). It’s function is to (…).

Answer 8

Number 1 in a wing structure is (the spars). It’s function is to (absorb the bending load)​.

Question 9

Number 1 in the attachment is the (…). Its function is to (…).

Answer 9

Number 1 in the attachment is the (frame). Its function is to (carry loads due to lateral forces and keep the fuselage in shape)​.

Question 10

The fuselage structure used in pressurised transport aeroplanes is an example of a (…) structure. It usually consists of (…), (…) and (…).

Answer 10

The fuselage structure used in pressurised transport aeroplanes is an example of a (semi-monocoque) ​structure. It usually consists of (skin), (frames) and (stingers).

Question 11

A sandwich type structure is often used in aircraft design because of its (low/high) mass and (low/high)​ stiffness.

Answer 11

A sandwich type structure is often used in aircraft design because of its (low) mass and (high) stiffness.