Today's Message Index:
----------------------
1. 12:14 AM - Another update (Aerolitellc@aol.com)
2. 10:18 AM - Re: Angle for Useable Fuel and Flow Check (?) (Gary Gower)
3. 02:33 PM - Use of 7075-T-6 for wing attach fittings? (Walter Carey)
4. 03:29 PM - Re: Use of 7075-T-6 for wing attach fittings? (Jim Machin)
5. 03:46 PM - Re: Use of 7075-T-6 for wing attach fittings? (Mitch Hodges)
6. 04:31 PM - Re: Re: Use of 7075-T-6 for wing attach fittings? (Larry Hursh)
7. 04:37 PM - Re: Re: Use of 7075-T-6 for wing attach fittings? (Carlos Sa)
8. 06:21 PM - Re: Use of 7075-T-6 for wing attach fittings? (stepinwolf)
Message 1
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Just added some pics and comments about the fuselage..... :)))
_http://project601xl.com/Fuselage.html_
(http://project601xl.com/Fuselage.html)
Jeff
**************Get trade secrets for amazing burgers. Watch "Cooking with
Tyler Florence" on AOL Food.
(http://food.aol.com/tyler-florence?video=4&?NCID=aolfod00030000000002)
Message 2
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| Subject: | Re: Angle for Useable Fuel and Flow Check (?) |
Hello Dave,
Just my own point of view...
!st The XL is a low wing, pump operated fuel system. If we use the size of
pump(s) the correct diameter for the hoses as specidfied in the plan etc. the
flow should be correct.
With the Jabiru (and the Rotax 912, we even have The mechanic fuel pump from
the engine as an extra from the electric pump in the plans. Better if we use
an electric pump in the outlet of each wing tank.
2nd. I think that to test the flow with the highest flight angle is intended
for the gravity flow gasoline systems (high wings and/or header tank) where
a gasoline pump (electric or mechanic) is not used...
Probably I am wrong.
Saludos
Gary Gower.
do not archive.
DaveG601XL <david.m.gallagher@ge.com> wrote:
I am to the point in my final assembly where I would like to demonstrate the useable
fuel quantity and fuel flow checks. Per the FAA guidelines, they suggest
"5 degrees above the highest anticipated climb angle." I e-mailed ZAC for their
suggested angle at which to perform this test. I got back a disappointing catch-22
like non-answer. They said the highest angle I am likely to see is the
power on stall angle. "Which you will have to find in your flight testing." That
was the entire answer, not even a suggestion considering that I cannot do
one before the other. Thanks for nothing.
Does anybody who is flying an XL with a Jabiru 3300 have any insight on an appropriate
angle to use for this test? At least until I can fly and determine my
own results.
Thanks,
--------
David Gallagher
601 XL, working on final assembly.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184356#184356
Message 3
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| Subject: | Use of 7075-T-6 for wing attach fittings? |
Hi,
New to the site. Building in basement in Beavercreek, Ohio, just outside of
Dayton. Both wings, control surfaces and flaps complete. Yes, I can get them
out of the basement. Fuselage 50 % complete, held together by Clecoes. Once complete,
will disassemble and move to garage where fuselage will be aligned again
and riveted together. Not new to aviation or aircraft maintenance, especially
sheet metal work.
Question: Has anyone used, or thought about using 7075 T-6 Alclad .063 aluminum
as a backing plate on the rear center spar running thru the fuselage, and as
attachment plates between the rear center spar and the wing rear spar? 7075
T-6 is a high strength aluminum designed for use in high stress areas. I would
like to do this as I am in agreement with several readers who have suggested
that recent wing failures COULD have been the result of the failure of the rear
spar attach plates. My thought is that until the NTSB comes up with a reason
and a fix, why not add extra strength in that area. The added weight is minimal.
Any comments?
Walt
Message 4
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| Subject: | Use of 7075-T-6 for wing attach fittings? |
Walt,
7075 material, in general, is very susceptible to stress corrosion
cracking and is prohibited from being used on any military programs. On
our aircraft (I design UAV aircraft, Predator series) for the Air Force,
we have had to substitute 7050 for all the parts that were originally
7075 as we had seen some premature corrosion problems on some very well
corrosion-protected parts (anodized and painted). The corrosion process
is accelerated when the material is continually stressed as in landing
gear while the aircraft is sitting on the ground (which is where we saw
problems). While being much stronger than 2024 or 6061, 7075 really is
not a good choice of material. If the higher material properties are
required, 7050 can be used but it is very expensive.
Jim
Quickbuild 601XL, 0-200
-----Original Message-----
From: owner-zenith601-list-server@matronics.com
[mailto:owner-zenith601-list-server@matronics.com] On Behalf Of Walter
Carey
Sent: Friday, May 23, 2008 2:33 PM
Subject: Zenith601-List: Use of 7075-T-6 for wing attach fittings?
Hi,
New to the site. Building in basement in Beavercreek, Ohio, just
outside of Dayton. Both wings, control surfaces and flaps complete. Yes,
I can get them out of the basement. Fuselage 50 % complete, held
together by Clecoes. Once complete, will disassemble and move to garage
where fuselage will be aligned again and riveted together. Not new to
aviation or aircraft maintenance, especially sheet metal work.
Question: Has anyone used, or thought about using 7075 T-6 Alclad .063
aluminum as a backing plate on the rear center spar running thru the
fuselage, and as attachment plates between the rear center spar and the
wing rear spar? 7075 T-6 is a high strength aluminum designed for use in
high stress areas. I would like to do this as I am in agreement with
several readers who have suggested that recent wing failures COULD have
been the result of the failure of the rear spar attach plates. My
thought is that until the NTSB comes up with a reason and a fix, why not
add extra strength in that area. The added weight is minimal.
Any comments?
Walt
Message 5
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| Subject: | Re: Use of 7075-T-6 for wing attach fittings? |
[quote="careywf(at)sbcglobal.net"][b]Hi,
Yes, I can get them out of the basement.
>
Had to smile at that! I'm also building mine in the basement, with basically the
same plan. My response is "Well, I'll either get it out, or end up with a
really cool bar in the new rec room!"
DO NOT ARCHIVE
--------
Mitch Hodges
N601MH (Zenith 601HDS)
Builder Log at http://www.hodges.aero
Wings Under Perpetual Construction
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184585#184585
Message 6
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| Subject: | Re: Use of 7075-T-6 for wing attach fittings? |
Yes, I can get them out of the basement.
Had to smile at that! I'm also building mine in the basement, with basically
the same plan. My response is "Well, I'll either get it out, or end up with a
really cool bar in the new rec room!"
.....There's only one word that comes to my mind:
Sawsall....LOL
Larry Hursh
CH601XL (Building from Kits - Rudder, tail sections done, working on wings)
(N601LL Reserved)
Edwardsburg, Michigan
Keep your eyes skyward - always!
Do Not Archive
Message 7
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| Subject: | Re: Use of 7075-T-6 for wing attach fittings? |
...then we are at least three in this situation...
Cheers
Carlos
CH601-HD, plans
2008/5/23 Mitch Hodges <n601mh@hodges.info>:
>
> [quote="careywf(at)sbcglobal.net"][b]Hi,
> Yes, I can get them out of the basement.
>
> >
>
>
> Had to smile at that! I'm also building mine in the basement, with
> basically the same plan. My response is "Well, I'll either get it out, or
> end up with a really cool bar in the new rec room!"
>
> DO NOT ARCHIVE
>
> --------
> Mitch Hodges
> N601MH (Zenith 601HDS)
> Builder Log at http://www.hodges.aero
> Wings Under Perpetual Construction
>
>
Message 8
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| Subject: | Re: Use of 7075-T-6 for wing attach fittings? |
Carlos,
You might want to make that four, since I too am building in the basement. The
reason is because it's cool in the Summer, and warm during the cold Canadian Winters.
I can get everything out, except for the fuselage, which will be disassembled,
and rebuilt in the garage.
Bob the 701 scratch
Three Rivers ,
Quebec
Do not archive
--------
Live each day, as if it was your last
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=184596#184596
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