I think what David Baker is asking in a roundabout way is this:
Is it OK to put the NEW layup schedule for the CARBON on top of the OLD
layup schedule for the WEB.
Dave Morris
At 11:47 AM 6/6/98 -0700, you wrote:
>David A. Baker wrote:
>>
>> I would appreciate some advice on this carbon fibre issue guys. My wing has
>> been built to the old layup schedule and my canard shear web has also been
>> built to the old schedule. I can't see any problem with using the new
carbon
>> fibre schedule on the canard as it will still give greater rigidity and a
>> little more tensile strength. Can anyone suggest a reason why it would not
>> be smart? For example, the old web is one layer thinner, but I would not
>> think that additional carbon will transfer more shear force to the web than
>> it could handle. What say you all?As I recall being told, (or perhaps
read in a newsletter?) Rex
>Taylor was concerned about the growing weight of many of the DF
>hitting the sky. Many, many were being flown over
>advertised gross weight.
>
>Nate Rambo was enlisted to do some structural calculations to see
>if the spar could handle these new weights. As it turned out,
>the old layup could indeed handle the weight, but Rex and Nate
>wanted some security if they were going to put their blessings on
>the regular use of any higher weight than what the original
>designer intended.
>
>The new layup was published, along with a new gross weight, ONLY
>if the new layup was done.
>
>If you have an old canard, and you adhere to the old limits,
>you'll have no problems. If you want to bump your gross to the
>new limits, with the old layup.... to each his own. The old
>layup calculates to work with the new gross, but it's NOT
>RECOMMENDED.
>
>Correct me if I'm wrong,
>
>Pat
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