Wake vortices always move upwards after being generated.

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Question restatement:
- The statement to evaluate is: 'Wake vortices always move upwards after being generated.'
- Answer options: ["True", "False"]

Option 1: True
- This option asserts that wake vortices always ascend after creation. While ascent can occur in certain conditions, the term 'always' is problematic because wake vortex behavior depends on multiple factors.
- In stratified or ambient wind conditions, or when the vortices encounter shear, they may descend, curve, or drift laterally rather than continuously rising. The idea that motion is universally upward disregards these influences and oversimplifies vortex dynamics.
- Additionally, the inertia of the vortex system, buoyancy effects of surrounding air, and the momentum imparted by the generating aircraft influence the initial trajectory. Therefore, claiming an immutable upward motion ignores these complex interactions and is not supported by typical wake behavior.

Option 2: False
- This option contends that wake vortices do not necessarily move upward after generation. This aligns with real-world observations where vortices can descend due to gravitational effects, ambient stratification, and wind shear.
- In many flight and atmospheric scenarios, one part of the vortex pair may descend or both may descend, especially as they age and lose energy. Turbulence and crosswinds can also cause lateral drift or vertical mixing that does not require upward motion.
- The statement 'wake vortices always move upwards' neglects the variability in wake evolution and is inconsistent with standard fluid-dynamic explanations of vortex behavior in the atmosphere.

Summary perspective:
- The claim that wake vortices always move upwards is an overgeneralization that ignores conditions like wind shear, stability, and age of the vortex, all of which can produce downward or non-upward movement.
- The alternative emphasizes that wake vortices do not have a guaranteed vertical trajectory in all situations, which matches observed dynamics of wake evolution in real environments.

Note: If you are applying this to a specific scenario (e.g., a particular altitude, wind profile, or aircraft type), you would assess the local atmospheric conditions and aircraft-induced downwash to determine the likely vortex path precisely.

PACE FA 321 - DB Module 04 Quiz

Wake vortices always move upwards after being generated.

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