Re: COZY: Re: [c-a] Mounting Wing Root Bearing


Joe Person
 

In general terms, boils down to knowing what the material properties are (in this case clad vs. bare), and choosing materials appropriately, based on intended use.

I'd not tumble clad parts either.  You could very-well "lose control" over the integrity of the cladding, and effectively eliminate the overall efficacy of the cladding as a result.

-Joe Person


From: cozygirrrl@...
To: totucomm@..., miketooze@...
Cc: ezcopilot@..., ezejoe@..., macleodm3@..., canard-aviators@...
Sent: Monday, November 3, 2014 8:57:49 AM
Subject: Re: COZY: Re: [c-a] Mounting Wing Root Bearing

The only thing we don't like about ALCLAD is that it is soft; put the parts in a vibrating tumbler and the ceramics really do a number on the surface, un-clad parts come out looking great.
 
 
-----Original Message-----
From: to tu totucomm@... [canard-aviators] To: Mike Tooze
Cc: Bruce Hughes ; Joe Person ; Andrew Anunson ; canard aviators
Sent: Sun, Nov 2, 2014 5:51 am
Subject: Re: COZY: Re: [c-a] Mounting Wing Root Bearing

 
Mike <<See;  - alclad goes without saying for 2024-T3 plate.>>

Mike I'm not sure but I think you're saying something about the effectiveness of alclad.  Something I learned only recently is that 2024-Tx doesn't always have the alclad, and you can actually get 6061-tx with alclad.  (and the alclads for these two have their own and differing alloys)    So when Joe mentiined his bits were 2024 we probably shouldn't assume it has alclad. 

Tom


On Sunday, November 2, 2014, Mike Tooze miketooze@... [canard-aviators] <canard-aviators-noreply@...> wrote:
 


Bruce  wrote:


 < Is there any other choice?

Hi Bruce, All,

In fact the original VE plans called for matched-drilled lift tabs (2024-T3) and steel backing plates. Tap the steel plates and clearance/ream the tabs to fit.  Install 'wet' behind the reinforced shear web.
However if I was to do it now I'd probably go with the nut plates. Slightly better grip length/tolerance allowance.

What's the call-out for lift tab material these days?

Interesting also that Joe Person reported a piece of 2024-T3 with nut plates and an AN3 bolt showing no signs of corrosion after twenty years in a poor environment.

See;  - alclad goes without saying for 2024-T3 plate.

I expect soon Marc will be getting that metallurgist report on the mystery wing attach plates...

Mike Tooze
O-235 Vari Eze, 32yrs this 30th Nov.
Rochester, England










On Sat, 1 Nov 2014 21:45:48 +0000 (UTC)
  Joe Person <ezejoe@...> wrote:
> Nutplates in the canard lift tab inserts are well-buried. Nutplates
>common-to cowling fasteners are not. I have a nutplate sample (2
>nutplates riveted to a piece of 2024-T3 one with an AN3 bolt
>installed) that has "lived" in the typical hangar conditions in the
>Puget Sound area (damp & cool/cold from October to May) for going on
>20 years. No problems.
>
> When speaking of corrosion issues due to environment, it is always
>useful to qualify the conditions under which the corrosion occurs -
>hangared? Not hangared? Nose of project sticking out from under the
>hangar roof over a winter or so?
>
> -Joe Person
>
> ----- Original Message -----
>
>From: "builders, cozy" <cozy_builders@...>
> To: "Bruce Hughes" <ezcopilot@...>, "Andrew Anunson
>macleodm3@... [canard-aviators]"
><canard-aviators-noreply@...>, "row row"
><catchrow@...>, "Canard Aviators List"
><canard-aviators@...>, "builders, cozy"
><cozy_builders@...>
> Sent: Saturday, November 1, 2014 2:03:27 PM
> Subject: COZY: Re: [c-a] Mounting Wing Root Bearing
>
>
> Bruce,
> Thanks for the information. Talk about a can of worms...I have
>nutplates imbedded in my canard lift tab inserts, I suppose all of us
>do. I will not be worried about this issue, but its worth mentioning
>for planes stored 300 yards from the ocean. I suppose there is salt
>in the air?
>
> Andrew Anunson
>
>
>
>From: Bruce Hughes <ezcopilot@...>
> To: Andrew Anunson <macleodm3@...>; "Andrew Anunson
>macleodm3@... [canard-aviators]"
><canard-aviators-noreply@...>; row row
><catchrow@...>; Canard Aviators List
><canard-aviators@...>; Cozy Builder Google List
><cozy_builders@...>
> Sent: Saturday, November 1, 2014 4:28 PM
> Subject: Re: [c-a] Mounting Wing Root Bearing
>
> Andrew, Many years ago I had my project on Maui, 300 yards from the
> ocean.
> I put on new nutplates for all of the 39 bolts for the cowling. When
> I got the
> project to Washington state, 10 years ago, I had to replace several
> nutplates.
> They are a type of steel that does not resist corrosion, I guess.
>
> I still use nutplates but not where they are buried in flox or foam.
>
> Bruce hughes
>
>
>
>
>
> On Sat, 1 Nov 2014 18:01:25 +0000 (UTC)
> "Andrew Anunson macleodm3@... [canard-aviators]"
> < canard-aviators-noreply@... > wrote:
>> Thanks Rowan! I did search the archives for awhile, but didn't find
>>the discussion that you mention. Its always better to search first.
>> I agree that 0.063 is adequate... just didn't want to have buried
>>corrosion in my wings in the year 2040.
>> Andrew Anunson
>> From: row row < catchrow@... >
>> To: Andrew Anunson < macleodm3@... >; Canard Aviators List
>>< canard-aviators@... >; Cozy Builder Google List
>>< cozy_builders@... >
>> Sent: Saturday, November 1, 2014 1:30 PM
>> Subject: Re: [c-a] Mounting Wing Root Bearing
>>
>> That is the exact method i will be using- 0.063" alloy is more than
>>adequate. Remember to allodine/ allochrome the plate before glassing
>>it in!
>> Dig through the archives about 12 months ago re the debate as to
>>using clickbonds on your control system...
>> Happy building,
>> Rowan
>>
>>
>>
>>
>>
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------------------------------------
Posted by: "Bruce Hughes" <ezcopilot@...>
------------------------------------


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