In aviation, a graveyard spiral is a type of dangerous spiral dive once entered into is difficult to get out of. Stall is the partial or full lost of airflow over a wing; it happens at a critical point of an angel of attack. ---causing loss of lift--partial or complete.
The Graveyard Spin happens when the pilot enters into a spin and becomes confused because sensory cues make it feel as though the plane is turning one way, but the instruments indicate the opposite, creating a conflict. The result can be disastrous if enough altitude is lost before the pilot recognizes the illusion.
Almost all GA airplanes can recover from a graveyard spiral or spin, as long as your follow the right steps and don't over-react. Just remember, it all comes down to airspeed. If you have high airspeed and you're turning, chances are you're in a spiral.
The main differentiation between a graveyard spiral and a spin is the aerodynamic status of the aircraft. A graveyard spin is a form of a stall. In a spin, one wing stalls before the other inducing rotation around the vertical axis of the plane.
Death spirals occur because the pilot feels the descent but not the turn. That has to do with the way the human body relies both on the visual and vestibular systems to perceive its orientation in space. As fluid moves through the small canals in the inner ear, the brain registers the body's shifts in position.
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.
Description. A Dutch roll is a combination of rolling and yawing oscillations that occurs when the dihedral effects of an aircraft are more powerful than the directional stability. A Dutch roll is usually dynamically stable but it is an objectionable characteristic in an airplane because of its oscillatory nature.
Preventing a graveyard spiral is a matter of maintaining a good instrument scan, whether you're a private pilot on a night flight, or an instrument pilot in IMC. Spirals typically happen when you're distracted, and when you haven't scanned your instruments for a long period of time.
The Airplane Flying Handbook offers a different recovery procedure for the spiral dive: reduce power, push forward on the yoke, roll to a level attitude, and gently raise the nose to level flight.
4.5 Descent
A descent during air travel is any portion where an aircraft decreases altitude. Descents are an essential component of an approach to landing.
Elevator Illusion:
An abrupt upward vertical acceleration, as can occur in an updraft, can stimulate the otolith organs to create the illusion of being in a climb. The disoriented pilot may push the aircraft into a nose-low attitude.
A “death spiral” is a strange natural phenomenon in which a colony of ants essentially commits suicide by following each other in an endless circle until they die of exhaustion. Army ants are blind, so they follow the pheromones of a single lead ant.
It's a common driving superstition that whenever you pass a graveyard in your car, you should hold your breath. Why? Some people believe it's to avoid making the ghosts jealous (you know, because you're alive and can still breathe) while others do it to avoid breathing in any spirits.
It's simply the process of air escaping and the loosened dirt and soil settling into place – due to gravity, this all happens with downward momentum, hence the grave appearing to sink. The coffin will also naturally collapse over time, which further shifts the soil within the grave.
The sinkage of the surface of a grave can cause distress to the bereaved, it is a 'natural' phenomenon that affects all cemeteries. Following the backfilling of any excavation, unless sufficient pressure is applied to thoroughly compact the backfilled material to exclude air spaces, the backfilled material sinks.
The Black Hole Illusion (BHI) is a nighttime aviation landing illusion that occurs when only the runway is visible to pilots. With this illusion, pilots overestimate their descent angle, which causes them to overestimate their height, compensate by flying lower, and crash into the ground.
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 ...
The Coriolis illusion generally occurs when a pilot is in a turn and bends the head downward or backward (e.g., to look at a chart or the overhead panel). This angular motion of the head and of the aircraft on two different planes can cause problems.
You can be held legally liable under 91.13 Careless and Reckless Operation otherwise. A barrel roll is a safe, 1G maneuver WHEN PROPERLY EXECUTED and has been performed many times in all types of airplanes. The ability to do so depends on the aircraft type, pilot's skill, and time and place.
A useful type of out-of-plane maneuver employed to decrease AOT are various barrel rolls called displacement rolls, in order to shift the aircraft laterally from its projected flight path onto a new flight path. By controlling the roll rate the pilot can control the degree of displacement.
The initial shock and numbness might last from a few minutes to a few weeks.
Shock may also mean that you feel nothing when you hear of the loss. This is normal and over time you are likely to start to feel different emotions. Shock is different for everyone and may last for a couple of days or weeks.
A falling leaf (also called a rudder stall or oscillation stall) is a maneuver in which an aircraft performs a wings-level stall (the airplane stops flying and starts falling) which begins to induce a spin.