There is information some where as to the torque for each size
bolt and thread pitch. A good reference, Virg
On 8/31/2015 2:15 PM, brian.kraut--- via KRnet wrote:
> And that is almost how they are done on the Mustang 2. Those without
> folding wings use a bolt and nut, but when u
>
>
> Rob Schmitt
>
>
>
>
> -Original Message-
> From: Mark Langford via KRnet
> To: KRnet
> Cc: Mark Langford
> Sent: Sun, Aug 30, 2015 6:00 pm
> Subject: Re: KR> Reaming WAFs
>
>
> Nobody's shown me a torque for KR wing attach fittings.
I thought the limit on the WAF was the crush strength of the wood as
opposed to the strength of the bolts?
On Mon, Aug 31, 2015 at 2:22 PM, Virgil N.Salisbury via KRnet <
krnet at list.krnet.org> wrote:
>
> There is information some where as to the torque for each size
> bolt and thread p
--Original Message-
From: Mac McConnell-Wood via KRnet
To: KRnet
Cc: Mac McConnell-Wood
Sent: Mon, Aug 31, 2015 6:30 am
Subject: Re: KR> Reaming WAFs
Just to add my 2 cents of limited knowledge - I remember during my time as
an
airforce tech, torqueing a critical bolt so that the Length of the
Message
Subject: Re: KR> Reaming WAFs
From: Mark Langford via KRnet
List-Post: krnet@list.krnet.org
Date: Sun, August 30, 2015 3:59 pm
To: KRnet
Cc: Mark Langford
Although I'm certainly not advocating anybody do this, you could likely
fly around with cottered pins in place of t
hmitt
-Original Message-
From: Mark Langford via KRnet
To: KRnet
Cc: Mark Langford
Sent: Sun, Aug 30, 2015 6:00 pm
Subject: Re: KR> Reaming WAFs
Nobody's shown me a torque for KR wing attach fittings. It's not in the
plans. Why is that? Because friction was not even considered i
Don Reid wrote back in 2007 that the WAF bolts function better as a single
bolt in double shear top & bottom (2 total) than 2 on each fitting, forward
and aft, top & bottom (4 total). I know that KRs fly in both configurations.
My KR used 4 per side when I got it and (partially based upon Don's wel
Nobody's shown me a torque for KR wing attach fittings. It's not in the
plans. Why is that? Because friction was not even considered in the
analysis of the wing attach joint. It was a pure shear calculation.
It's simply a pinned joint, and safe enough on that basis alone.
Although I'm certai
At 02:51 PM 8/30/2015, you wrote:
>Ignoring clamping friction in a bolted shear joint calculation seems
>to be a worst case analysis in that the assumption is: the bolts are
>torqued just enough to keep from rattling around. The total load
>then would be applied in shear to the bolt. That assu
Ignoring clamping friction in a bolted shear joint calculation seems to be a
worst case analysis in that the assumption is: the bolts are torqued just
enough to keep from rattling around. The total load then would be applied
in shear to the bolt. That assumption does not seem realistic for pra
Torque is only for keeping the nuts from backing off...it is much better
than lockouts.
https://sites.google.com/site/mykr2stretch/
https://sites.google.com/site/mykr2stretch/parts-for-sale
No one in their right mind would deliberately put a shear joint
assembly together without proper torqueing on the bolts.
Streamlined flying wires are installed in exactly that manner, with a
clevis pin, not a bolt, in shear bearing the tension load of the wire.
The clevis pin is retained by
> Matt Quimby wrote:
>
>>> I?vegot my wing spars aligned and attached my wing attach fittings. The next
> step, according to my plans, is to ream the inboard-to-outboard fitting
> holes from 3/16" to ??. This being obviously a pretty critical step to
> get right, I?m looking for some input on how
At 04:46 PM 8/29/2015, you wrote:
>with a 3/166??? bolt connecting my WAFs instead
>of ?
. I suppose my only recourse is
>careful, careful drilling. And then reaming.
I think you're right.
Sid Wood wrote:
> I had understood that the WAF bolts in shear were a backup for the
> real attachment: The clamping action due to the bolts squeezing the
> two outer and inner WAF plates together.
The stress guys I've worked with over the years don't even consider
friction as a useful force in
Typically the nut is only there as part of the design to keep the shear
pin, in this case the bolt, from falling out.
Chris Kinnaman
On 8/29/2015 2:45 PM, Mark Langford via KRnet wrote:
> Sid Wood wrote:
>
>> I had understood that the WAF bolts in shear were a backup for the
>> real attachment
I had understood that the WAF bolts in shear were a backup for the real
attachment: The clamping action due to the bolts squeezing the two outer and
inner WAF plates together. If the bolts were a sliding fit, then the WAFs
would need to move to get the holding action without the clamping action
Matt Quimby wrote:
>> I?vegot my wing spars aligned and attached my wing attach fittings. The next
step, according to my plans, is to ream the inboard-to-outboard fitting
holes from 3/16" to ??. This being obviously a pretty critical step to
get right, I?m looking for some input on how some other
Hello all, new member here. I?m partway through building a KR-2. I?ve got my
wing spars aligned and attached my wing attach fittings. The next step,
according to my plans, is to ream the inboard-to-outboard fitting holes from
3/16" to ??. This being obviously a pretty critical step to get right,
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