Contents
What is automatic pitch trim?
The automatic pitch trim: 1) ensures the aeroplane is properly trimmed when the auto pilot is engaged. 2) permits the elevator to always be in neutral position with respect to horizontal stabiliser. 3) ensures the aeroplane is properly trimmed when the auto pilot is disengaged.
What does bank angle mean?
The bank angle is the angle at which the vehicle is inclined about its longitudinal axis with respect to the horizontal.
What are the pitch and roll angle limits indicated by the green signs?
Pitch limited to 30 deg up, 15 deg down, and 67 deg of bank. These limits are indicated by green = signs on the PFD. Bank angles in excess of 33 deg require constant sidestick input….
| High AOA Protection | Load Factor Limitation | Pitch Attitude Protection |
|---|---|---|
| High Speed Protection | Flight Augmentation (Yaw) | Bank Angle Protection |
How will the auto pilot react when High speed protection goes active?
Activation of High Speed Protection results in reducing the positive spiral static stability of the aircraft from its normal 33° to 0° which means that if the pilot releases the sidestick, the aircraft will roll to a wings level attitutde.
Do planes have auto trim?
ArduPlane provides a means to trim the pitch and roll control surfaces to correct for small trim errors, such that when flying in MANUAL mode, the plane will be in the same flying attitude as when flying in throttle controlled modes (AUTO, CRUISE,etc.) or FBWA.
What is Mach trim system?
Mach tuck is a nose down pitch tendency due to a change in the position of the centre of pressure resulting from a rearward movement of the shock wave which occurs as an aircraft in transonic flight accelerates beyond its limiting mach number (MMO). As an aircraft accelerates, the aerofoils create more lift.
What is bank angle warning?
Abstract: To reduce the risk of loss of control in-flight due to loss of attitude awareness, a new roll attitude alert was developed (Enhanced Bank Angle Warning). This alert consists of a moving red arrow on the primary flight display with a voice aural indicating the correct recovery action.
How does a plane maintain a constant bank angle?
At bank angles less than 33° with no input being made on the sidestick, the computers maintain a zero roll rate and, consequently, the aircraft will maintain a constant bank angle. Within this range, there is no need to make a correction in pitch, as this will be compensated for by the computers.
What happens to bank angle when AOA protection is active?
When AOA protection is active, the speed brakes retract automatically, if previously extended, and the bank angle limit is reduced from 67° to 45°. If the pilot maintains the backpressure, Alpha Floor (covered below) will activate. If the pilot disconnects the A/THR while maintaining full back stick, Alpha Max may be reached.
What happens when pitch compensation is no longer available?
Beyond 33° angle of bank, pitch compensation is no longer available. On releasing the sidestick to neutral, the aircraft rolls back to 33° angle of bank. Due to its neutral static stability, within 33° angle of bank, the aircraft maintains the selected flight path.
When does elevator control change in pitch normal law?
A: Radio altitude is below 50 feet (100 feet with autopilot coupled). B: Bank angle is greater than 33 degrees. C: Load factor is less than 1G. Q 17: In pitch normal law, the elevator control changes from the normal mode to a protection mode when the angle of attack is greater than: