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Ground spoiler behaviour upon landing

Featured Replies

Hi Team,

Can I check if the correct Ground spoiler behaviour is correctly implemented.

Based on the behaviour in the sim the ailerons upon touchdown have a full deflection up with the ground spoilers.

Upon the Airbus documentation I could find. They advise on the following.

EXTENSION

LANDING

If all thrust levers are at idle and the ground spoilers armed, when at least one landing gear is

on ground, the ground spoilers partially extend. This partial extension, by decreasing the lift

(lift dumping), will ease the touchdown of the aircraft, and will, consequently, lead to the full

extension of the ground spoilers.

During a partial extension:

- The deflection of spoilers 1 and 2 is 10 °

- The deflection of spoilers 3 to 7 is 15 °

- The ailerons are not deflected.

The extension rate is 5 °/s.

The ground spoilers fully extend when two landing gears are on ground.

Note: If the ground spoilers are not armed, they will automatically extend when the

reversers are selected.

During a full extension:

- The deflection of spoilers 1 and 2 is 35 °

- The deflection of spoilers 3 to 7 is 50 °

- The deflection of the ailerons is 30 ° up.

The extension rate is 17 °/s.

The roll function of the spoilers is inhibited below 110 kt, when the spoilers are used for the

ground spoiler function. Roll control is available through ailerons.

Based on videos, it appears the full deflection of the ailerons upward will only deploy at full reverse thrust whilst anything less of full reverse thrust (e.g. idle reverse thrust), the ailerons would be at the neutral position as per below.

Thanks,

Wisam

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