Yes Peter you make an interesting point about the wing frequency test, our
club used to have two IS28's and one day we discovered during that
particular test that the bolts had indeed not aligned properly.
From observation I don't think that many people are checking wing frequency
during DI's, whilst most modern gliders have simple main pin arrangements I
still think this is a worthwhile part of the DI since it also allows you to
listen for loose object within the wing and look for any sign of damage
within the wing structure (especially in wood)
I would suggest that anyone with a glider with that style of fitting ensure
that they include wing frequency test in their DI.
Cheers,
John
From: aus-soaring-boun...@lists.internode.on.net
[mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of Peter
Stephenson
Sent: Sunday, 15 May 2011 12:23 AM
To: aus-soaring@lists.internode.on.net
Cc: Lindsay Mitchell; Vince Everett
Subject: Re: [Aus-soaring] Foka incident
The same fixing system is in the IS28, IS29, IS30 which we have in our club.
We usually have terrible trouble reassembling the IS29 in our club from
misaligning the lower cone. This is because it does not have a turtle deck
to remove and we cannot see the lower cone like this Foka.
As for this accident, I wonder whether a wing frequency test as part of the
DI would have revealed that something was wrong with the connection? This
is not mentioned in the report.
PeterS
On 14/05/2011 7:49 PM, Christopher Mc Donnell wrote:
Family reaction.
9
http://www.lep.co.uk/news/traffic-and-transport/family_plea_over_gliders_1_3
379631
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