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 Posted: Sat Dec 30, 2006 11:30 pm Post subject: T4 vs T6 |
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Using T4 instead of T6 is certainly doable, if you're willing to do the calculations to see where additional strength may be required. The yield strength of T4 is only 21000 PSI, whereas T6 is at 40000. The tensile strength differs significantly as well. T4 is 35000 PSI, T6 is 45000 PSI. Early in my build process, I asked the same question of Caleb, who responded as I expected. ZAC is not interested in signing off on a weaker material, when the stronger T6 is readily available.
That being said, it's not exactly rocket science if you wanted to spend the time and effort to do it right. Oh wait, yeah it is. Still, the experimental aircraft arena should have room for those with large enough balls to stray from the crowd. Do us all a favor and post any changes, calculations, reasoning, etc. if you do vary from the design. I think there are quite a few who would be interested.
David Downey <planecrazydld(at)yahoo.com> wrote:[quote] Hi Ron;
I am still trying to make the decision between the XL and a RV9! If I do go the XL route, I will be reversing the entire design into CAD - that is just the way I like to work; it is a virtual build that really exposes questions before chips start to fall.
If you are still looking then and I do go that way I would be glad to send you the templates for the form blocks. When I do the development of the patterns I will be putting the springback corrections in per the Boeing design handbook values for 6061T6 sheet.
Has anyone used T4 for the formed parts? Seems like there might be a major advantage.
Ron Lalonde <rlalonde(at)HOTMAIL.COM> wrote:
[quote]--> Zenith-List message posted by: "Ron Lalonde"
Hi Gang
Well, all you fellas seem to have pretty illustrious careers!!
Myself, I retired from the Air Force in 1995, and am now a janitor at a
small elementary school.
I previously built a Volksplane and have most of the major parts of a
LongEZ in my basement.
My son and I went to Oshkosh last summer and he fell in love with the Zenith
601XL, which I recently started building.
PS: With all you CAD people and programmers on board is there anyone of you
that have or know where I can obtain CAD templates for the form blocks of
the 601XL....contact me offlist...rlalonde(at)hotmail.com.....Tks
Ron Lalonde
Debert, Nova Scotia, Canada
601XL
_________________________________________________________________
Off to school, going on [quote][b]
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