Principles Of Flight Day 1

Question 1

1nm in metres and ft

Answer 1

1852m

6080ft

Question 2

1 knot =

Answer 2

1nm/hour

Question 3

Kts to m/s

Answer 3

X0.5144

Question 4

M/s to kts

Answer 4

X1.944

Question 5

As mass increases, acceleration…

Answer 5

Decreases

Question 6

Momentum is…

Unit?

Answer 6

Mass in motion

Kg/m^2

Question 7

Two types of energy

Answer 7

Potential + kinetic

Question 8

Potential energy is

Answer 8

The energy of an object at rest

Question 9

Kinetic energy formula

Answer 9

KE=1/2mv^2

Question 10

Kinetic energy formula

Basic facts

Answer 10

If velocity doubled, ke is quadrupled.

If halfed, ke is divided by 4

Question 11

Work is

Answer 11

Force applied to move an object

Question 12

Power is

Answer 12

Rate of work done

Question 13

Factors affecting thrust

Answer 13

Speed.
Air density
Temperature

Question 14

Coander effect

Answer 14

High pressure going to low pressure areas

Question 15

(3 types of air flow)

Answer 15

Streamline
Turbulent
Vortex - tornadoes

Question 16

Stream tube is

Answer 16

Air flow getting bunched up together, getting faster as it goes over the airfoil

Question 17

Turbulent flow is caused by

Answer 17

Dirty plane, unorthodox shapes, poor surface texture

Question 18

Mass flow=

Formula

Answer 18

AVp
A = cross sectional area
V = velocity
p (rho) = density

A CONSTANT value

Question 19

Venturi tube.

Answer 19

Air compressing through tube.

Use formula AVp. So area decreases, velocity must increase. It’s always balanced, through one way or another.

Question 20

Bernoulli’s principle

Answer 20

Static pressure+ dynamic pressure = total pressure

PS + Q = PT