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False visual reference illusions may cause the pilot to orient the aircraft in relation to a false horizon; these illusions can be caused by flying over a banked cloud, night flying over featureless terrain with ground lights that are indistinguishable from a dark sky with stars, or night flying over a featureless terrain with a clearly defined ...
The leans is a type of vestibular illusion in flight which causes spatial disorientation. The process involves the semicircular canals of the vestibular system. The semicircular canals detect angular acceleration. In total, there are three semicircular canals: the anterior, posterior, and lateral canals.
Illusions caused by the otolith organs are called somatogravic illusions and include the Inversion, Head-Up, and Head-Down Illusions. The Inversion Illusion results from a steep ascent followed by a sudden return to level flight; the resulting relative increase in forward speed produces an illusion the aircraft is inverted. [8]
Graveyard spirals are the result of several sensory illusions in aviation which may occur in actual or simulated IMC, when the pilot experiences spatial disorientation and loses awareness of the aircraft's attitude. The pilot loses the ability to judge the orientation of their aircraft due to the brain's misperception of spatial cues.
A pilot not using the flight instruments for reference may instinctively try to level the aircraft with respect to the false horizon, resulting in an accident. Helicopter rotor wash also causes sand to blow around outside the cockpit windows, possibly leading the pilot to experience the vection illusion, where the helicopter appears to be ...
The Coriolis effect is a concern for pilots and astronauts, where it can cause extreme disorientation. [14] [15] [5] [16] [17] This happens as pilots turn or rotate their aircraft, while also turning their head.
The green Teletubby, Dipsy, was 8 feet (244 cm). The show was filmed on an incredibly large set to create the illusion that the Telletubbies were small. The location of the set was so secret ...
The NTSB concluded that the aircraft was likely flying in IMC without the ground visible when the go-around mode was actuated, [11]: 41 and the first officer most likely experienced a pitch-up or head-up somatogravic illusion, the false sensation that one is tilting backwards during unexpected forward acceleration in the absence of visible ...