Re: Re: Black F1D wing

From: Kevin Lamers <kevin.lamers_at_gmail.com>
Date: Sat, 21 Feb 2015 22:30:03 +0000

Maybe, but besides that it will very difficult, I also think it will be
very weak when loaded in flying direction instead of lift direction. So
overall stability of the spar will be poor probably.

Op za 21 feb. 2015 19:22 schreef 'William D. gowen' wdgowen_at_gmail.com
[Indoor_Construction] <Indoor_Construction_at_yahoogroups.com>:

>
>
> It looks like the next step is using end grain balsa between the carbon.
> Won't be easy.
>
>
>
> On 2/21/2015 3:19 AM, Kevin Lamers kevin.lamers_at_gmail.com
> [Indoor_Construction] wrote:
>
>
> Hey,
>
> I am willing to test this, how would I best perform this test?
>
> Here a picture of 2 test pieces which I broke. It really took a
> considerable amount of force to break them. Please notice how they failed:
> no delamination, but actually crushing of the balsa after which the carbon
> filaments snapped.
> http://s3.postimg.org/vv3sv7dcj/broken_spar.jpg
>
> Kevin
>
>
>
> 2015-02-20 22:22 GMT+01:00 mkirda_at_sbcglobal.net [Indoor_Construction] <
> Indoor_Construction_at_yahoogroups.com>:
>
>>
>>
>> Hi Kevin.
>>
>> I'd be really curious if you experience any delaminations after putting a
>> test spar in a high humidity environment, then a low one.
>>
>> Humidity and balsa seems to be the bane of Boron fiber's existence. Also
>> true for glued down carbon tow.
>>
>> I'm sold if it works though!
>>
>> Regards.
>> Mike Kirda
>>
>
>
>
>
Received on Sat Feb 21 2015 - 14:30:05 CET

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