Today's Message Index:
----------------------
1. 01:46 AM - Re: 701 fuel system design (jetboy)
2. 08:50 AM - Re: bending MLG spring with heat (bryanekholm)
3. 11:06 AM - Re: bending MLG spring with heat (Tom P)
4. 12:52 PM - Re: Re: bending MLG spring with heat (Roy Szarafinski)
5. 02:01 PM - Re: bending MLG spring with heat (Tom P)
6. 06:48 PM - Re: bending MLG spring with heat (d.shrader)
7. 06:49 PM - Re: 701 fuel system design (d.shrader)
Message 1
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| Subject: | Re: 701 fuel system design |
I added some photos of my plumbing here:
http://www.zenith.aero/profile/RalphSanson?xg_source=profiles_memberList
Ralph
--------
Ralph - CH701 / 2200a
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252410#252410
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| Subject: | Re: bending MLG spring with heat |
I will be bending my 701 main gear in the near future also, so this post interests
me. Any tips or suggestions from those who have already been through the
process would be greatly appreciated.
One question I have is: Do you add or subtract degrees for spring-back when the
gear is bent while heated as opposed to it being bent cold?
Bryan Ekholm
--------
Bryan Ekholm
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http://forums.matronics.com/viewtopic.php?p=252440#252440
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| Subject: | Re: bending MLG spring with heat |
6061 aluminum comes in different heat treated conditions. The first is 6061-0 which
is easiest to bend then the solution heat treated 6061-T4 and then the aged
after T4 to T6 condition which is the hardest and strongest conditions. By
heating the aluminum you may be altering the T6 condition either back to 0 condition
or something between that. I would suggest calling your local heat treat
shop and have it re-heat treated back to T6 condition because you don't want
stress differences by having different tempers in your spring gear. My 801 gear
is T651 which is T4 stress relieved and then straightened and then aged to
T6.
I personally wouldn't take any chances on landing gear not being the right T6 temper
at minimum and preferably T651. Typically heat treating aluminum takes several
hours at about 950F or higher and then it is water/brine quenched giving
it the T4 condition and still somewhat workable. Followed by another aging process
at around 500F for a few hours. After the aging it is in T6 condition and
ready to be your spring. It is also important to make sure of the grade of
your aluminum so the heat treater can use the proper processing temperatures.
Then again maybe Zenith just heats the spot up to bend and thats the end of that??????
If anyone knows what Zenith does please jump in.
--------
Tom CH801
Dynon D180
Lycoming IO-360 From Teledyne Mattituck
http://home.cogeco.ca/~tomp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252451#252451
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| Subject: | Re: bending MLG spring with heat |
T-6 etc, all true. Zac bends the 701 gear cold, I asked a couple years ago at Osh.
I bent mine cold, figured it out after a couple of test pieces.
Roy
----- Original Message ----
From: Tom P <tompizza@hotmail.com>
Sent: Friday, July 10, 2009 2:06:00 PM
Subject: Zenith701801-List: Re: bending MLG spring with heat
6061 aluminum comes in different heat treated conditions. The first is 6061-0 which
is easiest to bend then the solution heat treated 6061-T4 and then the aged
after T4 to T6 condition which is the hardest and strongest conditions. By
heating the aluminum you may be altering the T6 condition either back to 0 condition
or something between that. I would suggest calling your local heat treat
shop and have it re-heat treated back to T6 condition because you don't want
stress differences by having different tempers in your spring gear. My 801 gear
is T651 which is T4 stress relieved and then straightened and then aged to
T6.
I personally wouldn't take any chances on landing gear not being the right T6 temper
at minimum and preferably T651. Typically heat treating aluminum takes several
hours at about 950F or higher and then it is water/brine quenched giving
it the T4 condition and still somewhat workable. Followed by another aging process
at around 500F for a few hours. After the aging it is in T6 condition and
ready to be your spring. It is also important to make sure of the grade of
your aluminum so the heat treater can use the proper processing temperatures.
Then again maybe Zenith just heats the spot up to bend and thats the end of that??????
If anyone knows what Zenith does please jump in.
--------
Tom CH801
Dynon D180
Lycoming IO-360 From Teledyne Mattituck
http://home.cogeco.ca/~tomp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252451#252451
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| Subject: | Re: bending MLG spring with heat |
Here is some extra information regarding heating the aluminum!
http://en.allexperts.com/q/Metallurgy-2280/6061-T6-Aluminum-lose.htm
--------
Tom CH801
Dynon D180
Lycoming IO-360 From Teledyne Mattituck
http://home.cogeco.ca/~tomp
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252480#252480
Message 6
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| Subject: | Re: bending MLG spring with heat |
rvickski(at)yahoo.com wrote:
> T-6 etc, all true. Zac bends the 701 gear cold, I asked a couple years ago at
Osh. I bent mine cold, figured it out after a couple of test pieces.
> Roy
>
> ---
Roy
can you give some information on your method of bending? I need all the help i
can get on bending up such a thick chunk of material.
thanks
Dave
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252517#252517
Message 7
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| Subject: | Re: 701 fuel system design |
jetboy wrote:
> I added some photos of my plumbing here:
>
> http://www.zenith.aero/profile/RalphSanson?xg_source=profiles_memberList
>
>
> Ralph
Ralph
thankyou for your help
dave
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=252518#252518
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