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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.
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.
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 ...
They are especially dangerous because they can clutter up a radar with false targets making it easier for an attacker to get within weapons range and neutralize the radar. Corner reflectors can be fitted on decoys to make them appear larger than they are, thus furthering the illusion that a decoy is an actual aircraft. Some decoys have the ...
The brownout phenomenon causes accidents during helicopter landing and take-off operations in arid desert terrain. Intense, blinding dust clouds stirred up by the helicopter rotor downwash during near-ground flight causes significant flight safety risks from aircraft and ground obstacle collisions, and dynamic rollover due to sloped and uneven terrain. [5]
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 ...
BI-7 was flown twice with the RD-1 engine, on January 24 and March 9, 1945. Pallo reports there was an emergency with the landing gear during the January flight. In addition to the new engine, various changes were made to the aircraft's design: a larger rudder, smaller false keel, and different wing fillets.