[NSRCA-discussion] SYMPHONY PICS

[michael s harrison]

BTW when gray says wet he means saturate the cloth and the area to be
repaired.  Lay in the cloth, then take paper towels and blot and press out
all the excess.  The cloth should be pressed down very tight and all the
excess epoxy removed.  Otherwise you will add lots of weight very fast.

Mike

 

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Gray E Fowler
Sent: Thursday, May 08, 2008 2:39 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] SYMPHONY PICS

 


Dwayne 

I replied, but the lousy email source we are on ate the message I do
believe..as there is no record so I will type it again.. 

Only one photo opens-call behind canopy and it is blurred, but I think I see
the failure.  I will not be able to send any material this week so if you
are in a big hurry  (repair this weekend) you can use fiberglass. To repair
saturate the inside core material with epoxy about 1 inch past the damage.
Use 3-4 oz fiberglass and wet lay up over the damage plus 1 inch. So have a
2 inch wide piece of fiberglass for the repair. After the inside repair
cures, try to flex the area that was damaged...if the damaged area does not
flex then you are done...it is flexes easily then sand and remove all paint
and primer. Wet layup a patch of 2 oz fiberglass on the outside.
Fill,feather, prime, paint. 

What the repair needs to establish is reinstating the stiffness of the
structure. It will always be much stronger than needed for flight. Stiffnes
=good load distribution and good flight characteristics.




Gray Fowler
Senior Principal Chemical Engineer
Radomes and Specialty Apertures
Technical Staff Composites Engineering
Raytheon 




"Dwayne Brown" <dwaynenancy at suddenlink.net> 
Sent by: nsrca-discussion-bounces at lists.nsrca.org 

05/08/2008 02:25 PM 


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Gray, did you receive my pictures I sent last night? 

            Dwayne_______________________________________________
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