Secondary Index

 


Aerodynamics Index

Definitions

Aircraft Axis
CG definition
Define Up and Down
Define Pitch, Bank, Hdg
Define: Lift, drag, etc.

Define Power

 

Physics Review

Newton's First Law
Newton's Second Law
Newton's Third Law
Reaction = Lift
Reaction = Drag
Conservation of Energy
What is a Vacuum
Action at a Distance

The 4 Forces

Spotting Forces & Moments

Performance

Drag Overview
Induced Drag
Induced Drag Equation
Total Drag

Jet Climb Performance
Prop Climb Performance
Range Jet
Range Prop

Forces in a Turn

Misc

Pitch Controls
Roll Controls

Configurations

Definition of Pitch, Bank, and Heading

On the previous page we defined up and down and the horizon. Now we must define aircraft attitudes.

Attitude is always measured relative to the horizon plane. Pitch and bank represent the angle that the longitudinal and lateral axis make to the plane of the horizon respectively.

Pitch

The simulation to the left shows how pitch is presented on the instrument called the attitude indicator (AI.) The simulation includes a local horizon line and you can see that when the longitudinal axis is parallel to (or aligned with) the local horizon we say that pitch is zero. When the longitudinal axis is inclined so that the nose is above the horizon pitch is positive, and when below the horizon pitch is negative.

A common mistake is to confuse pitch with climb. While it is true that the nose is always up in a climb it is also quite possible to fly level with the nose up. The simulation shows this.

You can speed up and slow down by using the Z and Q keys (you may have to click on the simulation to wake it up.) You can also pitch the nose up and down using the up and down arrow keys.

Try slowing down in level flight (Z key.) Notice that the nose rises as the airplane slows down. The blue vector is the TAS and by definition TAS is in the direction of flight. So, if you are flying level then TAS must be parallel to the horizon.

Is it possible to descend with a nose up pitch attitude? Yes. Try slowing to 60 kIAS then descending 200fpm.

Move on only when you are sure you understand the difference between pitch and climb.