FH.III.C.K3a
KnowledgeMeteorology applicable to the departure, en route, alternate, and destination under visual flight rules (VFR) in Visual Meteorological Conditions (VMC), including expected climate and hazardous conditions such as:
Atmospheric composition and stability
From the FAA library
- Chapter 12: Weather Theory › Atmospheric Stability › Clouds
Heating of the air near the Earth’s surface creates an air…
- Chapter 6: Flight Controls › Flight Control Systems › Stabilator
When the control column is pulled back, it raises the stabilator’s trailing edge, pulling the nose of the aircraft. Pushing the control column forward lowers the trailing edge of the stabilator and pitches the nose of the aircraft down ... Because stabilators pivot around a central hinge point, they are extremely sensitive to control inputs and aerodynamic loads. Antiservo tabs are incorporated on the trailing edge to decrease sensitivity. They deflect in the same direction as the stabilator. This results…
- Chapter 5: Aerodynamics of Flight › Aircraft Design Characteristics › Longitudinal Stability (Pitching)
Neutral dynamic stability—once displaced, the displaced object neither decreases nor increases in amplitude. A worn automobile shock absorber exhibits this tendency. • Negative dynamic stability—over time, the motion of the displaced object increases and becomes more divergent. Stability ... quality of the aircraft’s response to the pilot’s control application when maneuvering the aircraft, regardless of its stability characteristics. Longitudinal Stability (Pitching) In designing an aircraft, a great deal of effort is spent in developing the desired degree…
- Chapter 3: Aircraft Construction › Alternate Types of Wings › Empennage
Empennage The empennage includes the entire tail group and consists of fixed surfaces, such as the vertical stabilizer and the horizontal stabilizer. The movable surfaces include the rudder, the elevator, and one or more trim tabs. [Figure ... rudder is attached to the back of the vertical stabilizer. During flight, it is used to move the airplane’s nose left and right. The elevator, which is attached to the back of the horizontal stabilizer, is used to move…
- Chapter 12: Weather Theory › Atmosphere › Composition of the Atmosphere
Atmosphere The atmosphere is a blanket of air made up of a mixture of gases that surrounds the Earth and reaches almost 350 miles from the surface of the Earth. This mixture is in constant motion. If the atmosphere were ... eddies, rising and falling air, and waves that travel for great distances. Life on Earth is supported by the atmosphere, solar energy, and the planet’s magnetic fields. The atmosphere absorbs energy from the sun, recycles water and other chemicals…
- Chapter 7: Helicopter Instrument Procedures › Stabilization and Automatic Flight Control System (AFCS)
Stabilization and Automatic Flight Control System (AFCS) Helicopter manufacturers normally use a combination of a stabilization and/or AFCS in order to meet the IFR stability requirements of 14 CFR Parts 27 and 29. These systems include: • Aerodynamic surfaces, which impart ... some stability or control capability that generally is not found in the basic VFR configuration. • Trim systems provide a cyclic centering effect. These systems typically involve a magnetic brake/spring device and may be controlled by a four-way switch…