Today's Message Index:
----------------------
1. 09:53 AM - Re: Nutplate Question (Mark Schrimmer)
2. 11:30 AM - Re: Re: Nutplate Question (Glenn Brasch)
3. 11:33 AM - Re: Re: Nutplate Question (Dennis Thomas)
4. 11:53 AM - Re: Re: Nutplate Question (Bill Cary)
Message 1
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| Subject: | Re: Nutplate Question |
--> RV9-List message posted by: Mark Schrimmer <mschrimmer@pacbell.net>
Bill,
Are you sure about this? I've attached dozens of nutplates to dimpled ribs
and skins, but I haven't dimpled a single nutplate. Hope I haven't made a
major goof!
Mark
>Question.
> What problems will be created if the nutplate is not dimpled, and
>installed on a dimpled structure?
> The way I see it, the nutplate will not be flush with the surface it's
> mounted to. When a screw is tightned, either the screw will be pulled
> inward possible putting an indentation in the joining piece and piece
> holding the nutplate or the nutplate will force the dimples with rivets
> outwards. In either case you end up with a weak connection and probably
> will find that the joint never stays tight. I suggest dimpling the
> nutplates.
> Just my $0.02 worth.
>
> Bill RV-9A wings
> Ramona, CA
>
Message 2
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| Subject: | Re: Nutplate Question |
--> RV9-List message posted by: "Glenn Brasch" <gbrasch@earthlink.net>
I have always dimpled my nutplates when called for. Just my .02. Glenn in
AZ -9a fuselage
----- Original Message -----
From: "Mark Schrimmer" <mschrimmer@pacbell.net>
Subject: RV9-List: Re: Nutplate Question
> --> RV9-List message posted by: Mark Schrimmer <mschrimmer@pacbell.net>
>
> Bill,
>
> Are you sure about this? I've attached dozens of nutplates to dimpled ribs
> and skins, but I haven't dimpled a single nutplate. Hope I haven't made a
> major goof!
>
> Mark
>
>
> >Question.
> > What problems will be created if the nutplate is not dimpled, and
> >installed on a dimpled structure?
>
> > The way I see it, the nutplate will not be flush with the surface it's
> > mounted to. When a screw is tightned, either the screw will be pulled
> > inward possible putting an indentation in the joining piece and piece
> > holding the nutplate or the nutplate will force the dimples with rivets
> > outwards. In either case you end up with a weak connection and probably
> > will find that the joint never stays tight. I suggest dimpling the
> > nutplates.
> > Just my $0.02 worth.
> >
> > Bill RV-9A wings
> > Ramona, CA
Message 3
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| Subject: | Re: Nutplate Question |
--> RV9-List message posted by: Dennis Thomas <dthomas773@sbcglobal.net>
If .02 cents worth is allowed, I agree with Bill. It
is probably one of those things you may be able to get
away with but why take the chance. Consideer it will
only take a few minutes to dimple a few nutplates.
Compare that to the grief you will having to go back
and redo if your rivets start working.
Dennis Thomas
--- Mark Schrimmer <mschrimmer@pacbell.net> wrote:
> --> RV9-List message posted by: Mark Schrimmer
> <mschrimmer@pacbell.net>
>
> Bill,
>
> Are you sure about this? I've attached dozens of
> nutplates to dimpled ribs
> and skins, but I haven't dimpled a single nutplate.
> Hope I haven't made a
> major goof!
>
> Mark
>
>
> >Question.
> > What problems will be created if the nutplate is
> not dimpled, and
> >installed on a dimpled structure?
>
> > The way I see it, the nutplate will not be flush
> with the surface it's
> > mounted to. When a screw is tightned, either the
> screw will be pulled
> > inward possible putting an indentation in the
> joining piece and piece
> > holding the nutplate or the nutplate will force
> the dimples with rivets
> > outwards. In either case you end up with a weak
> connection and probably
> > will find that the joint never stays tight. I
> suggest dimpling the
> > nutplates.
> > Just my $0.02 worth.
> >
> > Bill RV-9A wings
> > Ramona, CA
> >
>
>
>
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Message 4
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| Subject: | Re: Nutplate Question |
--> RV9-List message posted by: Bill Cary <cary@Fusion.gat.com>
Mark Schrimmer wrote:
>--> RV9-List message posted by: Mark Schrimmer <mschrimmer@pacbell.net>
>
>Bill,
>
>Are you sure about this? I've attached dozens of nutplates to dimpled ribs
>and skins, but I haven't dimpled a single nutplate. Hope I haven't made a
>major goof!
>
>Mark
>
Hi Mark,
Not sure you made a major goof or not.
IMHO: It just seems that if the surface is dimpled and the
nutplate is neither dimpled nor countersunk then the nutplate will be
resting on the raised material formed from the dimple process. When
you tighten the screw, at some point something has to give until the
nutplate is pulled flush to it's mounting surface. That process
could/will cause material to bend in a way that may not be what the
designer/builder intended.
If not dimpling worked for you, go for it. That's your choice
and that's why these are Experimental aircraft. You can almost
anything you want.
Bill
RV-9A wings
Ramona, CA
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