Hard landing: Difference between revisions
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Flight Safety Foundation, FSF Digest, August 2004 http://flightsafety.org/fsd/fsd_aug04.pdf#page=3 Stabilized Approach and Flare Are Keys to Avoiding Hard Landings |
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[[Landing]] is the final phase in [[flight]], in which the aircraft returns to the [[Earth|ground]]. The average vertical speed in a landing is around 2 meters per second (10 ft/s); greater vertical speed should be classed by crew as "hard". Crew judgement is most reliable to determine hard landing, as determination based on recorded acceleration value is difficult and not advisable<ref>RALPH MICHAEL GARBER, LAWRENCE VAN KIRK. [http://www.boeing.com/commercial/aeromagazine/aero_14/conditional_story.html Conditional Inspections] // Boeing Aero No 14</ref>. |
[[Landing]] is the final phase in [[flight]], in which the aircraft returns to the [[Earth|ground]]. The average vertical speed in a landing is around 2 meters per second (10 ft/s); greater vertical speed should be classed by crew as "hard". Crew judgement is most reliable to determine hard landing, as determination based on recorded acceleration value is difficult and not advisable<ref>RALPH MICHAEL GARBER, LAWRENCE VAN KIRK. [http://www.boeing.com/commercial/aeromagazine/aero_14/conditional_story.html Conditional Inspections] // Boeing Aero No 14</ref>. |
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Hard landings can be caused by [[weather]] conditions, mechanical problems, over-weight aircraft, [[Aviator|pilot]] decision and/or [[pilot error]]. The term ''hard landing'' usually implies that the pilot still has total or partial control over the aircraft, as opposed to an uncontrolled descent into terrain (a [[Aviation accidents and incidents|crash]]). Hard landings can vary in their consequences, from mild passenger discomfort to vehicle damage, [[structural failure]], injuries, and/or loss of life. When an [[aircraft]] has a hard landing, it must be inspected for damage before its next flight. |
Hard landings can be caused by [[weather]] conditions, mechanical problems, over-weight aircraft, [[Aviator|pilot]] decision and/or [[pilot error]]. The term ''hard landing'' usually implies that the pilot still has total or partial control over the aircraft, as opposed to an uncontrolled descent into terrain (a [[Aviation accidents and incidents|crash]]). Hard landings can vary in their consequences, from mild passenger discomfort to vehicle damage, [[structural failure]], injuries, and/or loss of life. When an [[aircraft]] has a hard landing, it must be inspected for damage before its next flight<ref>RALPH MICHAEL GARBER, LAWRENCE VAN KIRK. [http://www.boeing.com/commercial/aeromagazine/aero_14/conditional_story.html Conditional Inspections] // Boeing Aero No 14</ref>. |
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For [[helicopter]]s, a hard landing can occur after mechanical or engine damage or failure when the rotor(s) are still intact and free to turn. [[Autorotation (helicopter)|Autorotation]], in which airflow over the rotors keeps them turning and provides some [[lift (force)|lift]], can allow limited pilot control during descent. As an unpowered descent, it requires considerable pilot skill and experience to safely execute. |
For [[helicopter]]s, a hard landing can occur after mechanical or engine damage or failure when the rotor(s) are still intact and free to turn. [[Autorotation (helicopter)|Autorotation]], in which airflow over the rotors keeps them turning and provides some [[lift (force)|lift]], can allow limited pilot control during descent. As an unpowered descent, it requires considerable pilot skill and experience to safely execute. |
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== External Links == |
== External Links == |
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* [http://flightsafety.org/fsd/fsd_aug04.pdf#page=3 Stabilized Approach and Flare Are Keys to Avoiding Hard Landings] / Flight Safety Foundation, FSF Digest, August 2004 |
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{{Types of take-off and landing}} |
{{Types of take-off and landing}} |
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Revision as of 18:49, 30 September 2016
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A hard landing occurs when an aircraft or spacecraft hits the ground with a greater vertical speed and force than in a normal landing.
Landing is the final phase in flight, in which the aircraft returns to the ground. The average vertical speed in a landing is around 2 meters per second (10 ft/s); greater vertical speed should be classed by crew as "hard". Crew judgement is most reliable to determine hard landing, as determination based on recorded acceleration value is difficult and not advisable[1].
Hard landings can be caused by weather conditions, mechanical problems, over-weight aircraft, pilot decision and/or pilot error. The term hard landing usually implies that the pilot still has total or partial control over the aircraft, as opposed to an uncontrolled descent into terrain (a crash). Hard landings can vary in their consequences, from mild passenger discomfort to vehicle damage, structural failure, injuries, and/or loss of life. When an aircraft has a hard landing, it must be inspected for damage before its next flight[2].
For helicopters, a hard landing can occur after mechanical or engine damage or failure when the rotor(s) are still intact and free to turn. Autorotation, in which airflow over the rotors keeps them turning and provides some lift, can allow limited pilot control during descent. As an unpowered descent, it requires considerable pilot skill and experience to safely execute.
A hard landing of a spacecraft such as a rocket stage usually ends with its destruction and can be intentional or unintentional. When a high-velocity impact is planned (when its purpose is to study consequences of impact), the spacecraft is called an impactor.
See also
References
- ^ RALPH MICHAEL GARBER, LAWRENCE VAN KIRK. Conditional Inspections // Boeing Aero No 14
- ^ RALPH MICHAEL GARBER, LAWRENCE VAN KIRK. Conditional Inspections // Boeing Aero No 14
External Links
- Stabilized Approach and Flare Are Keys to Avoiding Hard Landings / Flight Safety Foundation, FSF Digest, August 2004