Today's Message Index:
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1. 06:05 PM - Engineer question (Miller John)
2. 06:43 PM - Re: Engineer question (Carl Froehlich)
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Subject: | Engineer question |
See the picture below. I sent the below to Ken today at Vans. His
answer was no answer possible as they have no data on it.
So, for any of you structural engineer types out there, can you offer an
opinion on whether oversizing these holes creates a structural issue?
They are now 10/32 holes in the longeron vice the plans 6/32 holes.
Thanks - grumpy
gengrumpy@aol.com
>
>
>
>
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> Ken, i was going to use 8/32 vice 6/32 for the fairings under the
horizontal. Mis-drilled and now 10-32 tapped. Do you see a structural
issue for me here?
>
> Thanks - John
>
>
> John Miller - Sent from my iPhone
Message 2
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Subject: | Re: Engineer question |
The whole "thread the hole in the longeron" idea never appealed to me. I do
n't think threads in aluminum would last too long. I drilled these holes us
ing #28 bit and then mounted #6 nut-plates behind them.
As you are now over drilled I suspect you have weaken the longeron somewhat,
but I'd guess marginally. If you have reservations then you can add a .063
" backing plate on the inside of the longeron angle along the rivet line the
length of the screw holes. Consider adding nut-plates if you do.
Carl
> On Jun 19, 2015, at 9:02 PM, Miller John <gengrumpy@aol.com> wrote:
>
> See the picture below. I sent the below to Ken today at Vans. His answer
was no answer possible as they have no data on it.
>
> So, for any of you structural engineer types out there, can you offer an o
pinion on whether oversizing these holes creates a structural issue? They a
re now 10/32 holes in the longeron vice the plans 6/32 hole
> Thanks - grumpy
> gengrumpy@aol.com
>>
>>
>>
>> <FullSizeRender.jpeg>
>>
>> Ken, i was going to use 8/32 vice 6/32 for the fairings under the horizon
tal. Mis-drilled and now 10-32 tapped. Do you see a structural issue for me
here?
>>
>> Thanks - John
>>
>>
>> John Miller - Sent from my iPhone
>
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