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Author: Sylvia ElseSylvia Else Date: Mar 4, 2008 15:32
On Seven's report last night, there was a commentator (possibly David
Learmount of Flight International, but don't quote me), who was
explaining that a concern with a wing strike is that the wing buckles,
resulting in asymmetrical lift that cause the aircraft to turn over.
Sounded right to me at first, but then I got to wondering. The main
force is upwards at the wing tip. This involves bending the wing in its
strongest direction, and wings will bend a long way before they break.
Granted, the load is at the tip, rather than spread along the wing, but
is buckling of the wing anywhere other than very near the tip a likely
failure mode?
Sylvia.
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Author: BernieFlyerBernieFlyer Date: Mar 4, 2008 21:45
Paul Saccani wrote:
> On Wed, 05 Mar 2008 10:32:43 +1100, Sylvia Else
> wrote:
>
>> On Seven's report last night, there was a commentator (possibly David
>> Learmount of Flight International, but don't quote me), who was
>> explaining that a concern with a wing strike is that the wing buckles,
>> resulting in asymmetrical lift that cause the aircraft to turn over.
>>
>> Sounded right to me at first, but then I got to wondering. The main
>> force is upwards at the wing tip. This involves bending the wing in its
>> strongest direction, and wings will bend a long way before they break.
>
> True, many of this category of aircraft have to go an incredible way
> before they break, almost with the wing tips touching in many cases!
> But the problem of skin buckling would occur long before the wing
> actually breaks.
>
>> Granted, the load is at the tip, rather than spread along the wing, but
>> is buckling of the wing anywhere other than very near the tip a likely ...
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Author: Gordon BeamanGordon Beaman Date: Mar 5, 2008 20:27
On Wed, 05 Mar 2008 10:32:43 +1100, Sylvia Else
wrote:
snip
>
>Sounded right to me at first, but then I got to wondering. The main
>force is upwards at the wing tip. This involves bending the wing in its
>strongest direction, and wings will bend a long way before they break.
>
>Granted, the load is at the tip, rather than spread along the wing, but
>is buckling of the wing anywhere other than very near the tip a likely
>failure mode?
>
>Sylvia.
Who says that the main force is at the tip?...seems to me that there's
much more 'bending force' right at the fuselage on either side, after
all, the fuselage is what's supplying the 'load to be lifted' isn't
it?. The engines are attached to the wings and therefore aren't felt
at the main spars at all, and the wing weight and wing fuel weight
likely wouldn't supply any 'bending force' either.
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Author: Sylvia ElseSylvia Else Date: Mar 5, 2008 21:59
Gordon Beaman wrote:
> On Wed, 05 Mar 2008 10:32:43 +1100, Sylvia Else
> wrote:
>
> snip
>> Sounded right to me at first, but then I got to wondering. The main
>> force is upwards at the wing tip. This involves bending the wing in its
>> strongest direction, and wings will bend a long way before they break.
>>
>> Granted, the load is at the tip, rather than spread along the wing, but
>> is buckling of the wing anywhere other than very near the tip a likely
>> failure mode?
>>
>> Sylvia.
>
> Who says that the main force is at the tip?...seems to me that there's
> much more 'bending force' right at the fuselage on either side, after
> all, the fuselage is what's supplying the 'load to be lifted' isn't
> it?. The engines are attached to the wings and therefore aren't felt
> at the main spars at all, and the wing weight and wing fuel weight ...
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Author: RTRT Date: Mar 5, 2008 23:32
"Gordon Beaman" islandtelecom.com> wrote in message
news:o3sus3923k3g7aemmf9oa0a4vl7gekjqdg@4ax.com...> On Wed, 05 Mar 2008 10:32:43 +1100, Sylvia Else
> wrote:
>
> snip
>>
>>Sounded right to me at first, but then I got to wondering. The main
>>force is upwards at the wing tip. This involves bending the wing in its
>>strongest direction, and wings will bend a long way before they break.
>>
>>Granted, the load is at the tip, rather than spread along the wing, but
>>is buckling of the wing anywhere other than very near the tip a likely
>>failure mode?
>>
>>Sylvia.
>
> Who says that the main force is at the tip?...seems to me that there's
> much more 'bending force' right at the fuselage on either side, after
> all, the fuselage is what's supplying the 'load to be lifted' isn't ...
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Author: CoopCoop Date: Mar 6, 2008 01:13
On Thu, 6 Mar 2008 17:32:02 +1000, "RT" nowhere.com.au>
wrote:
>
>"Gordon Beaman" islandtelecom.com> wrote in message
>news:o3sus3923k3g7aemmf9oa0a4vl7gekjqdg@4ax.com...>> On Wed, 05 Mar 2008 10:32:43 +1100, Sylvia Else
>> wrote...
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