Flight Manoeuvres – Stall Performance

Aerodynamic Stall (Recap)

Characteristics Effecting Stall Speed

Washout Wing Design – Softening Stalls

Washout is a twist in a wing that causes the wingtip to meet the airflow at a lower angle than the root in normal upright flight. It can be added after construction by slightly raising both ailerons. This is recommended for the maiden flights of a new model.

Washout is a design characteristic built into the wing, where the angle of attack is reduced span-wise from root to tip, typically 1° to 2°. It creates a situation where the root of the wing stalls before the tip, softening the stall and allowing the ailerons to be functional deep in the stall.

Stall Recovery

Un-stalling the Aircraft

During stall, simultaneously:

Lower the nose
Full Power
Rudder to stop further wing drop (if any)
Do Not use Aileron!

Using Aileron to pick up a wing drop will increase the Angle of Attack on the dropping wing and stall it further creating a further wing drop – Remember the aerofoil has stalled Therefore use rudder to keep straight.

When recovered: