Power On Stall

 

Clearing Turn
Altitude

HASEL check list before stalls:

Height - 2,000'+ AGL
Area - Over practice area, farms
Security - doors, windows, loose articles
Engine - Primer, Master, Magnetos, Indicators, Carb heat, Mixture, Breakers
Look out - two 90 degree turns or one 180 degree turn

Power ON/Departure Stall

In the world of aviation, a stall refers to a critical aerodynamic condition where the angle of attack increases beyond a certain point, causing a decrease in lift. This occurs at the critical angle of attack, independent of airspeed, flight attitude, or weight. During a stall, a fixed-wing aircraft might experience buffeting or a significant change in attitude.

Imagine this scenario: Your engine is roaring, the stall warning horn is blaring, your view is filled with nothing but sky, and your plane shudders, attempting to veer left. This is the chaotic and nerve-wracking moment before a power-on stall. Many flight students wonder, "Why must I learn this?"

Why Power-On Stall Training is Crucial:
Pilots might become distracted or disoriented after takeoff, inadvertently climbing too steeply. This causes the aircraft to slow down, increasing the wing's angle of attack, and leading to an unintentional stall, which might escalate into a spin. Recognizing and recovering from a power-on stall is essential for pilot safety.

Stall Recognition Techniques:
- Vision: Noticing the airplane's attitude, though not always reliable for detecting an approaching stall.
- Hearing: Listening for RPM loss and increased airflow noise around the cabin.
- Kinesthesia:Sensing changes in motion direction or speed, a crucial indicator.
- Feel: Being aware of control pressures and feedback.
- Aircraft Warnings: Heeding horns, rudder shakers, and stick shakers.

Recovery Procedure:
Thankfully, the recovery process is straightforward. Simply fly coordinated and reduce the angle of attack. The stall horn quiets down, buffeting ceases, acceleration resumes, and the aircraft stabilizes.

Typically, you'll lose minimal altitude during recovery and should continue climbing at a predetermined airspeed once the stall has been recovered.

**Airman Certification Standards:**
1. Demonstrates comprehensive knowledge of power-on stalls.
2. Chooses an entry altitude allowing completion of the task above 1,500 feet AGL (ideally 3000ft).
3. Prepares the aircraft in the takeoff or departure configuration, setting power to at least 65 percent.
4. Smoothly transitions from takeoff attitude to the pitch that induces a stall.
5. Maintains a specific heading (±10°) in straight flight or a specific angle of bank (not exceeding 20°, ±10°) in turning flight while inducing the stall.
6. Promptly recognizes and recovers from a fully developed stall.
7. Retracts flaps and, if applicable, the landing gear after establishing a positive climb rate.
8. Accelerates to VX or VY before final flap retraction, then returns to the designated altitude, heading, and airspeed.