SH.IV.A.R3
Risk managementGround resonance, as applicable.
From the FAA library
- Chapter 5: Aerodynamics of Flight › Ground Effect
aircraft leaving ground effect after takeoff encounters just the reverse of an aircraft entering ground effect during landing. The aircraft leaving ground effect will: • Require an increase in AOA to maintain the same CL • Experience an increase in induced drag ... nose-up change in moment • Experience a reduction in static source pressure and increase in indicated airspeed Ground effect must be considered during takeoffs and landings. For example, if a pilot fails to understand the relationship between the aircraft…
- Chapter 11: Helicopter Emergencies and Hazards › Ground Resonance
surface, the unbalanced condition could be further aggravated. If the rpm is low, the only corrective action to stop ground resonance is to close the throttle immediately and fully lower the collective to place the blades in low pitch ... normal operating range, fly the helicopter off the ground, and allow the blades to rephase themselves automatically. Then, make a normal touchdown. If a pilot lifts off and allows the helicopter to firmly re-contact the surface before the blades…
- Chapter 1: Introduction To Flying › Selecting a Flight School › Basic Requirements
application is completed electronically, the authorized person will submit the application to the FAA’s Airman Certification Branch (AFS-760) in Oklahoma City, OK, via the Integrated Airman Certification and Rating Application (IACRA). If the application is completed on paper ... sent to the local Flight Standards District Office (FSDO), who will forward it to AFS-760. Once the application is processed, the applicant will receive the Student Pilot Certificate by mail at the address provided on the application. The aforementioned…
- Chapter 14: Airport Operations › Collision Avoidance › Runway Incursion Avoidance
prevent ground deviations, stay alert during ground operations. Pilot deviations can and frequently do occur on the ground. Many strategies and tactics pilots use to avoid airborne deviations also work on the ground. Pilots should also remain vigilant about vehicle/pedestrian ... entering or moving on the runway movement area without authorization from air traffic control. In serious instances, any ground deviation (PD or VPD) can result in a runway incursion. Best practices in preventing ground deviations can be found…
- Glossary › Domestic Reduced Vertical Separation Minimum
Ground adjustable trim tab. Non-movable metal trim tab on a control surface. Bent in one direction or another while on the ground to apply trim forces to the control surface. Ground effect. The condition of slightly increased air pressure ... increases the amount of lift produced. It exists within approximately one wing span or one rotor diameter from the ground. It results from a reduction in upwash, downwash, and wingtip vortices, and provides a corresponding decrease in induced drag. Ground…
- Chapter 11: Communication & Navigation › Antennas › Transmission Lines
performance, the impedance of the transmission line should be equal to the impedance of the antenna. In aviation antenna applications, this is often approximately 50 ohms. [Figure 11-94] Special connectors are used for coaxial cable. A variety ... metal-skinned aircraft, a ¼ wavelength Marconi antenna is used. The skin is the ground plane that creates the 2nd quarter of the antenna required for resonance (left). On a non metallic-skinned aircraft, wires, conductive plates or strips equal…