ditching jet with wide bypass engines
Thread Starter
Joined: Jan 2010
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From: melbourne australia
ditching jet with wide bypass engines
for a long time the general wisdom was that the shear pins were partly there so the engines would break off on hitting the water to stop the engines digging in and destroying the plane
now it seems from the hudson river ditching that the jet has to touchdown tail first to keep the engines above the water as long as possible, and the shear pins most likely wont allow the engines to break off during ditching
howcome everyone seemed to have it wrong for so long?
is it now accepted that the shear pins are there only so a badly vibrating engine can fall from the wing
now it seems from the hudson river ditching that the jet has to touchdown tail first to keep the engines above the water as long as possible, and the shear pins most likely wont allow the engines to break off during ditching
howcome everyone seemed to have it wrong for so long?
is it now accepted that the shear pins are there only so a badly vibrating engine can fall from the wing
Fleet Manager
Joined: Apr 2001
Aviation Qualifications: ATPL
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From: various places .....
the general wisdom was that
perhaps in some circles but I suspect not amongst operational folk
the hudson river ditching
I suspect that the good folk flying the aircraft at the time were more intently concentrating on impacting the water at their understanding of the appropriate body angle and speed without thrust. They would have been mindful of the drag implications of the underslung engines but that would have been a secondary consideration ... best managed by attending to the first.
perhaps in some circles but I suspect not amongst operational folk
the hudson river ditching
I suspect that the good folk flying the aircraft at the time were more intently concentrating on impacting the water at their understanding of the appropriate body angle and speed without thrust. They would have been mindful of the drag implications of the underslung engines but that would have been a secondary consideration ... best managed by attending to the first.
Joined: Mar 2002
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From: Florida
howcome everyone seemed to have it wrong for so long?
Aviation insiders know better.
The idea is to protect the wing box and fuel tanks from any survivable load comming in from the pylon whether engine induced, manuever induced or just a bad ditching.
History seems to have verified this concept no matter what you call it.
Joined: Aug 2005
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From: fl
I really don't think ditching has anything to do with the shear pins on the engine pods. They keep an engine seizure from causing the wing to fail. Engineers don't design airplanes to ditch. They design them to fly safely.
Joined: Jun 2009
Posts: 594
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From: VA, USA
Should we campaign for "engine release pins"..... I vote that switch at least has a guarded cover.(I believe from Sully's perspective one of his biggest concerns was digging an engine in asymmetrically and cartwheeling.)
- GY
