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#141
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02-05-2023, 10:48 AM
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| ★ Legacy Member ★ Poster Rank:12 Join Date: Jun 2009 Posts: 81,663 Mentioned: 282 Post(s) Quoted: 32531 Post(s)
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
Actual pilots comments and EXPERT opinions on the disaster; https://www.pprune.org/accidents-clo...TR+Plane+Crash |
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#142
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02-06-2023, 03:22 PM
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| ★ Legacy Member ★ Poster Rank:12 Join Date: Jun 2009 Posts: 81,663 Mentioned: 282 Post(s) Quoted: 32531 Post(s)
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
On Feb 6th 2023 Nepal's AIC reported that both flight data and cockpit voice recorders were successfully read out in Singapore. According to first analysis of the flight data recorders both propellers of the aircraft went into the feather position. The reason for the feathering of both propellers is still being determined, human factors as well as technical factors are still under investigation. More; http://avherald.com/h?article=503c63e9 |
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#143
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02-07-2023, 04:29 PM
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| ★ Legacy Member ★ Poster Rank:12 Join Date: Jun 2009 Posts: 81,663 Mentioned: 282 Post(s) Quoted: 32531 Post(s)
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
Feathering. On many variable pitch propellers, the blade pitch can be increased to the point that the chord line of the blade is approximately parallel to the on-coming airflow. This process is referred to as feathering. The inflight feathering of the propeller, on an engine that has failed or has been intentionally shut down, greatly reduces the drag that would occur with the blade pitch in any other position. On a single engine aircraft such as a motor glider, feathering the propeller when the engine is shut down results in a significant increase in gliding distance. On a multi-engine aircraft, feathering the propeller of a failed engine results in both a reduction in drag and a reduction in adverse yaw vastly improving the engine-out handling characteristics and the engine-out flight performance of the aircraft. https://www.skybrary.aero/articles/feathering |
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#144
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02-08-2023, 03:31 PM
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| So Fucking Banned Poster Rank:1297 Join Date: Aug 2013 Posts: 469 Mentioned: 0 Post(s) Quoted: 187 Post(s)
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
location of person filming the plane going down from his balcony: 28.19776° N, 83.98573° E crash impact was only 80 meters away |
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#149
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01-20-2024, 03:24 AM
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
I don't know this specific aircraft, but the landing gear was extended, some warnings may be shutoff or altered when the gear is down. I don't think a stickshaker shuts off with gear down, but does shutoff at touchdown, when the switch that detects load on extended gear (i.e. touchdown) is closed. A fault here (i.e. a short that falsely indicated touchdown) is one example of how/why. |
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#150
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01-20-2024, 03:41 AM
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Re: Yeti Airlines Crashes a Mile Before Runway in Nepal
Some people die on impact. In this case, the aircraft was low and slow, initial impact energy absorbed in part by the left wing, and seats are typically designed for 13Gs or more, i.e. they are meant to absorb 13Gs of impact by collapsing. People, many, often survive the initial impact. It's the fire (and smoke and CO) or the elements, (as in JAL 123) that is the real life-ender. "I survived the crash but got immolated anyway" doesn't fit well on a T-shirt. Dang. |