[rebel-builders] gear leg parts -- alloy?

[Ken]

Many years ago Colleen told me that some of the fittings were 2024T3
which is stronger than 6061T6. I've never seen that in print and I have
some doubt as to whether it is true. Nor do I know of an easy test for
the difference but I figure 2024T3 is always safe if there is doubt. Or
a thicker piece of 6061T6. All other commercial and architectural grades
such as 6063, or less tempered material, are weaker. Well 7075 might be
stronger but it seems to be rare around my part of the world.
Ken

bransom@dcsol.com wrote:

I'd like to cut out a couple new of the landing gear .125" plate pieces -- L32
and LG27 -- these are what join the bungee wishbone legs, or tie the axles to
the main gear legs. Anyone know what alloy these are?
Thanks ,
-Ben/ 496R

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[grand canyon airport]

From Wes grandcanyonn38@epix.net

The tensile strength of 2024-T3 is 58,000-62,000 psi, the tensile strength
of 6061-T6 is 42,000 psi.

----- Original Message -----
From: "Ken" <klehman@albedo.net>
To: <rebel-builders@dcsol.com>
Sent: Saturday, October 17, 2009 10:27 AM
Subject: Re: [rebel-builders] gear leg parts -- alloy?

Many years ago Colleen told me that some of the fittings were 2024T3
which is stronger than 6061T6. I've never seen that in print and I have
some doubt as to whether it is true. Nor do I know of an easy test for
the difference but I figure 2024T3 is always safe if there is doubt. Or
a thicker piece of 6061T6. All other commercial and architectural grades
such as 6063, or less tempered material, are weaker. Well 7075 might be
stronger but it seems to be rare around my part of the world.
Ken

bransom@dcsol.com wrote:

I'd like to cut out a couple new of the landing gear .125" plate
pieces -- L32
and LG27 -- these are what join the bungee wishbone legs, or tie the
axles to
the main gear legs. Anyone know what alloy these are?
Thanks ,
-Ben/ 496R

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[bransom]

Thanks Ken,
I guess it is still inconclusive ...one of those old tidbits of info getting harder
to nail down. I've thought the leg pieces might be 6061T6 partly by seeing
how much they've bent on the wrecked gear set. (I believe 2024T3 would
not be so malleable.) As you say, with doubt, I'll probably just get some
2024.

BTW, I've been away from my building now for almost two months, but the
other projects are finally finishing and I can start getting back to the Rebel.
I'm almost surprised at how much I miss working on it, and look up in the sky
with such envy everytime something good flies over.
-Ben

On 10/17/2009 6:27 AM, klehman@albedo.net wrote to rebel-builders:

Many years ago Colleen told me that some of the fittings were 2024T3
which is stronger than 6061T6. I've never seen that in print and I have
some doubt as to whether it is true. Nor do I know of an easy test for
the difference but I figure 2024T3 is always safe if there is doubt. Or
a thicker piece of 6061T6. All other commercial and architectural grades
such as 6063, or less tempered material, are weaker. Well 7075 might be
stronger but it seems to be rare around my part of the world.
Ken

bransom@dcsol.com wrote:

I'd like to cut out a couple new of the landing gear .125" plate pieces --

L32

and LG27 -- these are what join the bungee wishbone legs, or tie the

axles to

the main gear legs. Anyone know what alloy these are?
Thanks ,
-Ben/ 496R

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[bransom]

This turned out to be easier than first thought. I took one of the LG27
fittings that needed replacing, put it in a vice, and tried bending one corner.
I tried the same bend on a piece of known 6061T6 of the same 1/8
thickness. With the 6061 I pretty easily got a tight radius bend to even
90*. With the LG27 turned test piece, the same attempt to bend bend broke
off right away. My conclusion: these are 2024.

-Ben

On 10/17/2009 6:27 AM, klehman@albedo.net wrote to rebel-builders:

Many years ago Colleen told me that some of the fittings were 2024T3
which is stronger than 6061T6. I've never seen that in print and I have
some doubt as to whether it is true. Nor do I know of an easy test for
the difference but I figure 2024T3 is always safe if there is doubt. Or
a thicker piece of 6061T6. All other commercial and architectural grades
such as 6063, or less tempered material, are weaker. Well 7075 might be
stronger but it seems to be rare around my part of the world.
Ken

bransom@dcsol.com wrote:

I'd like to cut out a couple new of the landing gear .125" plate pieces -

-

L32

and LG27 -- these are what join the bungee wishbone legs, or tie the

axles to

the main gear legs. Anyone know what alloy these are?
Thanks ,
-Ben/ 496R

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