The FAA seems to wander through various hot-button topics they want examiners to ask about during check-rides. In the past we had controlled flight into terrain,{CFIT}, and the Risk Management matrix..
Yesterday one of my private pilot clients was hit up with Somatogravic illusion during his oral.... Which of course sent his brain right off the rails. Although in a way he really knew the answer....or at least part of it...
1. The part he did know: Examiners often have the student under the hood and then tell them to close their eyes and put their head down while the examiner yanks the plane around in weird gyrations. Then the examiner tells the student to open their eyes and jerk their head up while taking control of the plane. In this case the sudden jerking up of the head screws up the inner ear and gives the student vertigo as they try to control the plane and regain level flight. In this case there is no valuable input from your eyes to tell you what is really going on.. ( That is why I tell my clients to slowing bring up their head to avoid the vertigo sensation during their check-rides.)
Well anyway, you can do the same thing to yourself during night flight during acceleration or deceleration.
Somatogravic Illusion
Instrument Flying Handbook Menu>Human Factors>Illusions Leading to Spatial Disorientation>Somatogravic Illusion
A rapid acceleration, such as experienced during takeoff, stimulates the otolith organs in the same way as tilting the head backwards. This action creates the somatogravic illusion of being in a nose-up attitude, especially in situations without good visual references. The disoriented pilot may push the aircraft into a nose-low or dive attitude. A rapid deceleration by quick reduction of the throttle(s) can have the opposite effect, with the disoriented pilot pulling the aircraft into a nose-up or stall attitude.
https://www.youtube.com/watch?v=_oc_52gnrv8
https://www.youtube.com/watch?v=ifpUD9Iteow
http://aviationknowledge.wikidot.com...ravic-illusion
http://www.skybrary.aero/index.php/S...d_Somatogyral_
Yesterday one of my private pilot clients was hit up with Somatogravic illusion during his oral.... Which of course sent his brain right off the rails. Although in a way he really knew the answer....or at least part of it...
1. The part he did know: Examiners often have the student under the hood and then tell them to close their eyes and put their head down while the examiner yanks the plane around in weird gyrations. Then the examiner tells the student to open their eyes and jerk their head up while taking control of the plane. In this case the sudden jerking up of the head screws up the inner ear and gives the student vertigo as they try to control the plane and regain level flight. In this case there is no valuable input from your eyes to tell you what is really going on.. ( That is why I tell my clients to slowing bring up their head to avoid the vertigo sensation during their check-rides.)
Well anyway, you can do the same thing to yourself during night flight during acceleration or deceleration.
Somatogravic Illusion
Instrument Flying Handbook Menu>Human Factors>Illusions Leading to Spatial Disorientation>Somatogravic Illusion
A rapid acceleration, such as experienced during takeoff, stimulates the otolith organs in the same way as tilting the head backwards. This action creates the somatogravic illusion of being in a nose-up attitude, especially in situations without good visual references. The disoriented pilot may push the aircraft into a nose-low or dive attitude. A rapid deceleration by quick reduction of the throttle(s) can have the opposite effect, with the disoriented pilot pulling the aircraft into a nose-up or stall attitude.
https://www.youtube.com/watch?v=_oc_52gnrv8
https://www.youtube.com/watch?v=ifpUD9Iteow
http://aviationknowledge.wikidot.com...ravic-illusion
http://www.skybrary.aero/index.php/S...d_Somatogyral_
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