Lift Augmentation

Question 1

What are the 5 types of flap

Answer 1

Plain

Split

Fowler

Slotted

Leading edge devices

Question 2

What are the 3 types of leading edge devices

Answer 2

Krueger flaps

Slats

Slottted leading edge

Question 3

How can we maintain more lift from our aerofoil?

Answer 3

Increasing the thickness chord ratio or controlling the boundary layer of air

Question 4

What are 3 methods of boundary layer control/reenergising the boundary layer of air

Answer 4

Blowing or Sucking
Directed air
Vortex generators

Question 5

What controls are used to move the aircraft around its three main axis

Answer 5

Rudder
Aileron
Elevator

Question 6

What are the two types of slats

Answer 6

Automatic and controllable

Question 7

What is directed air

Answer 7

Directed Air from propeller or jet over

the wings or flaps

Question 8

What are vortex generators

Answer 8

Vortex Generators are small plates or aerofoils set at an angle to the airflow

Re-energise the Boundary Layer by creating small Vortices that scavenge the Boundary Layer and entrain the faster smoother airflow onto it

The increase in Drag is minor compared to
the increase in Lift.

Question 9

What is blowing or sucking air

Answer 9

Blowing Air re-energises the Boundary Layer using air ejected at high speed in the same direction as the Boundary Layer.

Sucking Air involves drawing off the Boundary Layer’s sub-layer through Slots or Porous Skin.

This reduces the thickness of the Boundary layer replacing it with faster moving air.

Question 10

What are the 6 primary flight control requirements

Answer 10

Instinctive
Ease of operation
Feel
Smooth in action
Safe and reliable

Question 11

What are the three methods for providing power to flight controls

Answer 11

Mechanical

Hydraulic

Electric

Question 12

What is a flap

Answer 12

A retractable lift modifying device along the trailing edge of the wing

Question 13

What is a slat

Answer 13

A portion of the leading edge mounted on tracks so it can extend outward and create a duct to direct air over the surface

A4 Skyhawk

Question 14

What is the difference between ground and flight spoilers

Answer 14

Spoilers are devices on the wing to “Spoil” or reduce the lift being made

Flight spoilers are deployed at controlled angles during flight to increase descent rate or control roll

Ground spoilers are fully deployed immediately on landing to greatly reduce lift and increase drag.

Question 15

what are speed brakes

Answer 15

high drag devices which extend into the airstream to produce drag.

Question 16

What are trim tabs

Answer 16

Small movable portions of the trailing edge of a control surface used to alter the camber. Adjusted by the pilot

Question 17

what are the two types of trim tab

Answer 17

fixed and controllable

Question 18

what is a variable incidence tailplane

Answer 18

Where the entire tail plane moves to trim the aircraft

Question 19

What is a balance tab