---------------------------------------------------------- RV9-List Digest Archive --- Total Messages Posted Thu 02/24/05: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:40 AM - [Spam] Nutplate Question (smbluthing@volexpress.com) 2. 03:17 PM - Re: Re: Nutplate Question (John Oliveira) 3. 05:05 PM - Re: Re: Nutplate Question (Richard E. Tasker) ________________________________ Message 1 _____________________________________ Time: 07:40:35 AM PST US From: smbluthing@volexpress.com Subject: RV9-List: [Spam] Nutplate Question --> RV9-List message posted by: smbluthing@volexpress.com Subject: Nutplate Question From: Bob Perkinson (bobperk@bellsouth.net ) --> RV9-List message posted by: "Bob Perkinson" > Van tells us in section 5 that when installing nutplates that they are normally installed with A426AD3. When the structure is to thin to countersink then it should be dimpled along with the nutplate. Question. What problems will be created if the nutplate is not dimpled, and installed on a dimpled structure? Bob Perkinson Hendersonville, TN. RV9A If Nothing Changes Nothing Changes! this is what a tech told me a van's about this....he said you you could machine countersink the back side of the nutplate...i did this with the avery hand swivel tool with the deburing bit installed... hope this helps....i know i have recieved much help from this list thanks all ________________________________ Message 2 _____________________________________ Time: 03:17:12 PM PST US From: "John Oliveira" Subject: Re: RV9-List: Re: Nutplate Question --> RV9-List message posted by: "John Oliveira" You don't need to dimple the nutplates. if you draw a diagram in cross section you will see that the nutplate rests pretty equally on the dimpls for the rivets and the dimple for the machine screw. When assembled, everything is fine. John Oliveira ----- Original Message ----- From: "Mark Schrimmer" Subject: RV9-List: Re: Nutplate Question > --> RV9-List message posted by: Mark Schrimmer > > 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 _____________________________________ Time: 05:05:13 PM PST US From: "Richard E. Tasker" Subject: Re: RV9-List: Re: Nutplate Question --> RV9-List message posted by: "Richard E. Tasker" Good for nutplates for the 100 degree screws. Not good for the rest (a lot) of the nutplates. Dick Tasker do not archive John Oliveira wrote: >--> RV9-List message posted by: "John Oliveira" > >You don't need to dimple the nutplates. if you draw a diagram in cross >section you will see that the nutplate rests pretty equally on the dimpls >for the rivets and the dimple for the machine screw. When assembled, >everything is fine. > >John Oliveira > > >----- Original Message ----- >From: "Mark Schrimmer" >To: >Subject: RV9-List: Re: Nutplate Question > > > > >>--> RV9-List message posted by: Mark Schrimmer >> >>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 >>> >>> >>> >> >> >> > > > >