Information on older British skin alloy if any. 4

[berkshire]

Ok, I am looking for information on an older British aluminum alloy L72. I am getting ready to do a wing repair to a 50-year-old British aircraft. From all of the tables I have researched so far, it appears to be equivalent to 2014 alloy, when I research 2014, I can find very little information on that, however several comparison tables show it as being virtually identical to 2024 from a chemical standpoint. Did 2024 supersede 2014? Or is it available? The only reference I can find for it now is as diamond plate for aircraft floors from China.
I strongly suspect that if anybody has something on this it will be buried in a dusty old file.
The main question here is can 2024 be substituted for 2014? as an equivalent?
B.E.

You are judged not by what you know, but by what you can do.

 

[rb1957]

I'd be happy using 2024T3 as a substitute for L72.

another day in paradise, or is paradise one day closer ?

 

[berkshire]

That conclusion is what I am coming to, I am trying to make sure there are no booby traps before I do.
B.E.

You are judged not by what you know, but by what you can do.

 

[rb1957]

"none so blind as those that will not see"

"how hard can it be ?"

"lick o'paint"

What plane ?

another day in paradise, or is paradise one day closer ?

 

[Kwan]

Berkshire,

ANC-5 has 2014. It used to be called 14S and has allowables for both bare and clad flavors. ANC-5 shows the cross reference at the beginning of the aluminum section.

Many years ago, I wrote some material substitutions for landing gear into standard repairs. That's a good story, but I had to compare European materials with American materials. I can't remember where I found the European material information, but the information is out there. I compared chem composition and allowables.

Hope this helps a bit.

 

[rb1957]

MMPDS-01 has 2014(T6)

but I think the question was more along the lines "I can't get L72 or 2014, but I can get 2024"

another day in paradise, or is paradise one day closer ?

 

[Ng2020]

Bs l163 superseded (but is not necessarily a direct substitution for) l72
This might help you complete the paper trail.

http://silverbiplanes.com/tablet/british-standard-l.html

 

[Kwan]

RB says: but I think the question was more along the lines "I can't get L72 or 2014, but I can get 2024"

The OP says this in his last sentence: The main question here is can 2024 be substituted for 2014? as an equivalent?

 

[berkshire]

OK guys yes, the question really was I can use 2024, 2014 is harder to get around here. So I am going to go with that.
B.E.

You are judged not by what you know, but by what you can do.

 

[rb1957]

what plane ?

another day in paradise, or is paradise one day closer ?

 

[berkshire]

The plane is a British Slingsby T53 sailplane, it was one of the first metal sailplanes that Slingsbys produced. They only built 16 of them and there are only 5 of them in the USA today.
B.E.

You are judged not by what you know, but by what you can do.

 

[rb1957]

cool. do they fly with "experimental" cert ? or are you doing an RDA for your repair ?

another day in paradise, or is paradise one day closer ?

 

[berkshire]

rb1957 these aircraft have a standard type certificate, hence the hand wringing about which material to use. The maker no longer supports the aircraft, so the FAA guidelines about repairs to older aircraft are being used instead.
B.E.

You are judged not by what you know, but by what you can do.

 

[verymadmac]

There is this from the LAA,its not approved data but

http://www.lightaircraftassociation.../TL 1.16 Material Allowable Strength Data.pdf

 

[WKTaylor]

Ng2020... thanks for an odd/old nugget of knowledge!!

The base website

http://silverbiplanes.com

is very intriguing... it also includes many other old standards, thus...

Silver Biplanes
Standards
These Standards relate to pre Modern (1985) Antique and Classic aircraft.
They are provided on a non commercial basis for research or study, with the primary research purpose being assistance in identifying modern materials that may be suitable substitutes for unobtainable historic materials.

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Regards, Wil Taylor
o Trust - But Verify!
o We believe to be true what we prefer to be true. [Unknown]
o For those who believe, no proof is required; for those who cannot believe, no proof is possible. [variation,Stuart Chase]
o Unfortunately, in science what You 'believe' is irrelevant. ["Orion", Homebuiltairplanes.com forum]

 

[Ng2020]

Yes it was quite a lucky find. I thought you'd like that one!