What are stall warning devices?
Stall warning is provided by an electronic or mechanical device that sounds an audible warning as the stall speed is approached. The simplest such device is an airframe mounted stall warning horn which sounds when the airflow through it occurs at a specific angle.
How does a plane detect a stall?
Aircraft can stall at any airspeed, the only real indicator for a stall is an angle of attack indicator. This is because weight, icing, flaps, G-forces being pulled, and speed all effect the aircraft’s stall speed.
Is a stall warning horn required?
Re: Stall Warning System Required for Flight? There is no “legal requirement” for a stall horn.
What stall warning devices are used with the AOA indicator?
The simplest form of AOA indicator is a stall warning device that does not have a gauge located in the cockpit. It uses an aural tone to warn of an impending stall due to an increase in AOA. This is done by placing a reed in a cavity just aft of the leading edge of the wing.
What do stall strips do on an airplane?
Stall strips are usually located near the inboard leading edge area of the wing. Their purpose being (supposedly) to cause the inboard area of the wing to begin to stall first. This, theoretically, provides a more gradual stall and enables the ailerons to be effective longer.
Does the stall warning require a power source?
There is no electricity involved. The “lift detector” stall warning horn uses a tab that can be lifted during the preflight walk-around to sound the stall horn and requires an electrical system to operate.
What is aircraft stall?
When an aeroplane stalls, it is not like a car – the engine does not stop. The stall is a breakdown of the smooth airflow over the wing into a turbulent one, resulting in a decrease in lift. The lift will no longer fully support the aeroplane’s weight, and the aeroplane sinks.
What is an aircraft stall warning system?
An aircraft Stall Warning System is that system which provides the pilot with advance warning of an impending stall. As is the case with most safety related equipment, the requirement for a Stall Warning System will be found within the aviation regulations for the State of Manufacture and the State of the Operator for any given aircraft.
What is an audible stall warning?
Audible Warning. Stall warning is provided by an electronic or mechanical device that sounds an audible warning as the stall speed is approached. The simplest such device is an airframe mounted stall warning horn which sounds when the airflow through it occurs at a specific angle.
How do you provide a stall warning?
The stall warning may be furnished through the inherent aerodynamic qualities of the aircraft or by a device that will give clear, unambiguous indications under the expected conditions of flight. A visual stall warning device requiring the attention of the crew within the cockpit is not acceptable by itself
What happens to the aircraft during a stall?
As the aircraft approaches the stall, the airflow across the upper cambered surface of the wing ceases to flow smoothly, it looses contact with the wing surface and it becomes turbulent. If the turbulent air then flows across the horizontal stabiliser, buffet results.