Thanks for all of you friends ....It's clear now ,I just couldent get the
answer from those pics in eduardo barros site ..acctually there is no pic
that shows holes in his wing ribs..or maybe I did not understand because of
the langouage...I 'm doing the same way of eduardo , my spars are fine ,but
the only dfrance is that I covered my wing ribs with one layer of E- glass
_ both side of each rib_ so now I have to make holes through each one befor
adding foam between them on top and botom... ........ many Thanks for all
of you againe with best regards
Nasser AL
www.uaespaces.com
>From: "Stephen Jacobs" <ask...@microlink.zm>
>Reply-To: KRnet <kr...@mylist.net>
>To: "'KRnet'" <kr...@mylist.net>
>Subject: KR> wing quistion
>Date: Sat, 28 Aug 2004 09:07:18 +0200
>
>Hi Nasser
>
>As Larry says - you must avoid any sealed compartments anywhere in the
>airplane - so that atmospheric pressure can always equalize.
>
>The above is particularly important for the spars, where individual
>"compartments" are formed by the pillars between the spar caps. All of
>these cavities must be able to "vent" to the outside of the spar.
>
>I recall that you made some super strong spars with CF between cap
>laminations as well as ply /CF webs front and back. If you did not know
>this at the time, you may have created a sealed spar.
>
>If so Nasser - consider drilling a small hole (1 to 2 mm) through the
>web (front or back) into each compartment. From the plans you should
>know exactly where each full depth spar pillar is.
>
>Maybe glue an eyelet into the hole or pull a blind rivet to seal the
>exposed wood and keep the opening neat and clear.
>
>These holes can be very small - pin holes would be Ok, just ensure that
>nothing (paint /dirt /attachment) blocks them.
>
>Take care
>Steve J
>
>
>
>
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