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                           RV7-List Digest Archive
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                     Total Messages Posted Wed 12/15/04: 2
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Today's Message Index:
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     1. 04:43 AM - Re: HS Rear Spar Question  (LarryRobertHelming)
     2. 04:54 AM - Re: UNCLASSIFIED Re: HS Rear Spar Question  (LarryRobertHelming)
 
 
 
________________________________  Message 1  _____________________________________


Time: 04:43:39 AM PST US
From: "LarryRobertHelming" <lhelming@sigecom.net>
Subject: Re: RV7-List: HS Rear Spar Question

--> RV7-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>

You already have some good replies and I agree that the shop head should go
on the thicker mat'l side unless there are/is a reason to do it the other
way.  One other reason is because you want the DAR and others to be able to
see your shop heads after the part is closed up.  They can easily see the
quality of your finished rivet.

Indiana Larry, RV7 TipUp "SunSeeker"

The sincerest satisfactions in life come in doing and not dodging duty;
in meeting and solving problems, in facing facts;
in flying a virgin plane never flown before.
- Richard L. Evans & Larry R Helming
----- Original Message ----- 
From: "Scott R. Shook" <sshook@cox.net>
Subject: RV7-List: HS Rear Spar Question


> --> RV7-List message posted by: "Scott R. Shook" <sshook@cox.net>
>
> Ok so everything is primed and ready to go together.Following the plans, I
> am ready for the rear spar.
>
> But there is really no indication which direction the machined heads will
> face (fore or aft) for the rear spar (HS 609/603).  If you read section 5
in
> the manual it looks like the machined head is on the thinner piece of
> material.  However, I am not going off of that.  Is there something I am
> missing??
>
> I checked other builders sites and from what I saw of the pictures (read:
> SQUINTED) I could have swore that I found it both ways.
>
> Any help would be appreciated.
>
> Scott
>
>






________________________________  Message 2  _____________________________________


Time: 04:54:29 AM PST US
From: "LarryRobertHelming" <lhelming@sigecom.net>
Subject: Re: UNCLASSIFIED RE: RV7-List: HS Rear Spar Question

--> RV7-List message posted by: "LarryRobertHelming" <lhelming@sigecom.net>

> There is a convention that the shop head should, for preference, be
against
> the thinner sheet.
>
> However Vans, somewhere in my construction manual,  address the issue and
> make the observation that they have no evidence whatever that rivet
> orientation makes any difference to the strength of the final product.
>
> On my plane I put the shop head against the thinner sheet, but only where
> access is convenient. If access is not excellent the chance of a smiley or
> bent rivet becomes high and the damage is not worth the risk. I then
orient
> the rivet for best access, regardless of sheet thickness.
>
((((((((())))))))))  I realize this reply came from down under and perhaps
its in the semantics........However, with all due respect to our friends who
mostly upside down with us when standing with feet on firm ground in
Australia..........

I believe the shop head ( our shop ) should be on the thicker, not thinner
material side.  The machined head ( manufacturer ) should be on the thinner
side.  Less likely to cause stress cracks that way which can weaken our
structures just a bit.  See my other post on this for another reason you
might want your shop heads to be on the "seen" side.

Indiana Larry, RV7 TipUp "SunSeeker"

The sincerest satisfactions in life come in doing and not dodging duty;
in meeting and solving problems, in facing facts;
in flying a virgin plane never flown before.
- Richard L. Evans & Larry R Helming