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MauleDriver(at)nc.rr.com
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 Posted: Fri Nov 16, 2007 1:24 pm Post subject: Flexible fuel lines from Andair to tanks |
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To those that have done this, any advice? Any concerrns about minimum
bend radius needed to get from the tunnel out? From what I've read in
the archives, several people have done this but haven't found a lot of
detail on the fuel versus the brake lines. (There may be more to see
once Kitlog starts working again).
I was planning to run the aluminum lines but am having a real hard time
getting it in the fuselage after applying (2) 90deg bends. Curving it
doesn't seem to quite work. I can simply force it in by bending and
unbending but it gets scraped up.
So before ordering more tubing, I started to think that flexible lines
might be a good if more expensive solution. Aeroquip hoses seems to be
a popular choice.
Bill Watson
40605
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Fri Nov 16, 2007 3:48 pm Post subject: Flexible fuel lines from Andair to tanks |
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Exactly! You CAN'T bend and unbend AL tubing
without worry about stress and work hardening.
Thats what led me to flex lines too. They also spec.
min. bend radius on flex lines too. too will find them
much easier to work with.
Tim - do not archive
| Quote: |
To those that have done this, any advice? Any concerrns about minimum
bend radius needed to get from the tunnel out? From what I've read in
the archives, several people have done this but haven't found a lot of
detail on the fuel versus the brake lines. (There may be more to see
once Kitlog starts working again).
I was planning to run the aluminum lines but am having a real hard time
getting it in the fuselage after applying (2) 90deg bends. Curving it
doesn't seem to quite work. I can simply force it in by bending and
unbending but it gets scraped up.
So before ordering more tubing, I started to think that flexible lines
might be a good if more expensive solution. Aeroquip hoses seems to be
a popular choice.
Bill Watson
40605
|
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acs(at)acspropeller.com.a
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| Posted: Fri Nov 16, 2007 5:20 pm Post subject: Flexible fuel lines from Andair to tanks |
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Hi Bill, have you got a decent tube bender? The one I bought from Spruce
looks after multiple tubing diameters and can bend 180 deg no problem and no
flat spots. I was so impressed, I started re-doing my lines just for the fun
of it.(not really)
John 40315
---
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ricksked(at)embarqmail.co
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| Posted: Fri Nov 16, 2007 6:53 pm Post subject: Flexible fuel lines from Andair to tanks |
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Bill,
I used the flex lines, made them myself, they seek their own radius if you don't force them out of the tunnel through the same route as the aluminum lines. I can't see any reason not to use them, although there my be a bogey at my 6 coming out of the sun to tell me otherwise (NATO name johncox) I terminated them perfectly at the wing root, allows for flex at every area that may flex. I do plan on applying a time change to them, just not sure what that is yet but I suspect a minumum of every other or every third annual. Input for this is appreciated. They are fairly inexpensive and easy to make once you know the correct length. One real advanage is when using the andair, I could pull them togehter and route the rear cabin heat scat right on by the side. Insulated of course.
Rick S.
40185
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MauleDriver(at)nc.rr.com
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| Posted: Fri Nov 16, 2007 7:15 pm Post subject: Flexible fuel lines from Andair to tanks |
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Yes I do. I picked up one from Sears (Imperial 370FH) that works great
- 3 sizes, 180deg and anything else - no problem. I also have a cheapy
from Harbour Freight for 1/4" that works well too.
The problem I'm having is that I've managed to make 2 perfect 90deg
bends with perfect dimensions to get from the Andair fuel valve down to
the hole in the tunnel. But I can't fish the remaining straight part
thru the tunnel hole without curving and bending the section that is
supposed to be straight in the end.
John Dunne wrote:
[quote]
Hi Bill, have you got a decent tube bender? The one I bought from
Spruce looks after multiple tubing diameters and can bend 180 deg no
problem and no flat spots. I was so impressed, I started re-doing my
lines just for the fun of it.(not really)
John 40315
---
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MauleDriver(at)nc.rr.com
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| Posted: Fri Nov 16, 2007 7:24 pm Post subject: Flexible fuel lines from Andair to tanks |
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OK, that's what I wanted to hear. I just need to find the right
source. I'm hoping one of the race houses in around Charlotte will be a
good source. I plan to mail order but they are close enough to visit in
person if I want.
Aeroquip, here I come.
Tim Olson wrote:
| Quote: |
Exactly! You CAN'T bend and unbend AL tubing
without worry about stress and work hardening.
Thats what led me to flex lines too. They also spec.
min. bend radius on flex lines too. too will find them
much easier to work with.
Tim - do not archive
>
>
> To those that have done this, any advice? Any concerrns about minimum
> bend radius needed to get from the tunnel out? From what I've read in
> the archives, several people have done this but haven't found a lot of
> detail on the fuel versus the brake lines. (There may be more to see
> once Kitlog starts working again).
>
> I was planning to run the aluminum lines but am having a real hard time
> getting it in the fuselage after applying (2) 90deg bends. Curving it
> doesn't seem to quite work. I can simply force it in by bending and
> unbending but it gets scraped up.
>
> So before ordering more tubing, I started to think that flexible lines
> might be a good if more expensive solution. Aeroquip hoses seems to be
> a popular choice.
>
> Bill Watson
> 40605
>
>
>
|
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http://www.matronics.com/Navigator?RV10-List |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Fri Nov 16, 2007 8:23 pm Post subject: Flexible fuel lines from Andair to tanks |
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A couple of points...
1) Regarding line changes, if I could have taken the time to get
the exact measurement, there were some great conductive (use conductive
if you use teflon) hoses that I could have used. The only problem
is the ends aren't D.I.Y. so you have to have them made for you.
That would at least give a nice long service life. The Aeroquip
should last a long time but I'll probably replace them before
5-10 years. Probably closer to the latter. They actually hold up
great to all forms of fuel.
2) Regarding insulation, on the trip down and back to Vegas we used
cabin heat a bunch, being in the 25F range a lot. Some may remember
that this year I wrapped the SCAT for rear heat with the same
silver firewall insulation, all the way back to the fuel valve.
Now that I got a good chance to use cabin heat I think I can say
that I'd recommend insulating that SCAT all the way back. I notice
a very big difference in the top of the tunnel temp between the
insulated part and the non-insulated around the spar and aft. The
seat frames even soak in lots of heat when you have the rear heat
turned on far. By just wrapping the SCAT, you should be able to keep
the heat in the SCAT and not put it into the tunnel. Now, this has
nothing to do with the old popular complaint of hot tunnels
with no heat turned on....something that I personally no longer
believe is an issue if the builder takes a few steps to prevent
problems.
Tim Olson - RV-10 N104CD - Flying
Rick Sked wrote:
[quote]
Bill,
I used the flex lines, made them myself, they seek their own radius
if you don't force them out of the tunnel through the same route as
the aluminum lines. I can't see any reason not to use them, although
there my be a bogey at my 6 coming out of the sun to tell me
otherwise (NATO name johncox) I terminated them perfectly at the wing
root, allows for flex at every area that may flex. I do plan on
applying a time change to them, just not sure what that is yet but I
suspect a minumum of every other or every third annual. Input for
this is appreciated. They are fairly inexpensive and easy to make
once you know the correct length. One real advanage is when using the
andair, I could pull them togehter and route the rear cabin heat scat
right on by the side. Insulated of course.
Rick S. 40185 ---
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Fri Nov 16, 2007 8:37 pm Post subject: Flexible fuel lines from Andair to tanks |
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On my site I think I have a reference....there should be a photo
of the line type I used too. You may find it by searching
"Summit" using the search on the site. I think I ordered my hose
from Summit. I could be way off and bought it locally, but
I can't remember for sure. Other than learning how to put the
hose ends on carefully, it was pretty simple. You just have to
be careful cutting the braid and keeping it taped so it doesn't
come apart as it goes in the fitting.
I think I used Aeroquip and XRP fittings. Seeing them side by
side they look basically identical.
Actually, here's a link:
http://www.myrv10.com/N104CD/finishing/20051228/index.html
Tim Olson - RV-10 N104CD - Flying
MauleDriver wrote:
| Quote: |
OK, that's what I wanted to hear. I just need to find the right
source. I'm hoping one of the race houses in around Charlotte will be a
good source. I plan to mail order but they are close enough to visit in
person if I want.
Aeroquip, here I come.
Tim Olson wrote:
>
>
> Exactly! You CAN'T bend and unbend AL tubing
> without worry about stress and work hardening.
> Thats what led me to flex lines too. They also spec.
> min. bend radius on flex lines too. too will find them
> much easier to work with.
>
> Tim - do not archive
>
>
>>
>>
>> To those that have done this, any advice? Any concerrns about minimum
>> bend radius needed to get from the tunnel out? From what I've read in
>> the archives, several people have done this but haven't found a lot of
>> detail on the fuel versus the brake lines. (There may be more to see
>> once Kitlog starts working again).
>>
>> I was planning to run the aluminum lines but am having a real hard time
>> getting it in the fuselage after applying (2) 90deg bends. Curving it
>> doesn't seem to quite work. I can simply force it in by bending and
>> unbending but it gets scraped up.
>>
>> So before ordering more tubing, I started to think that flexible lines
>> might be a good if more expensive solution. Aeroquip hoses seems to be
>> a popular choice.
>>
>> Bill Watson
>> 40605
>>
>>
>>
>>
>>
>
>
|
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
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| Posted: Sat Nov 17, 2007 8:35 am Post subject: Flexible fuel lines from Andair to tanks |
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Rick, I am back in Cambridge doing some research at the MIT Aerospace Library on another matter but I will try to use the rising East Sun to sneak up on you.
Chris made a great point that flex lines have a hard date - time expiration like fruit or produce they have to be replaced at set intervals.
I liked the comment made at MIT that "A correct initial solution to a problem is better than masking its existance with redundant systems".
Whether flex, braided, teflon coated or solid, they all have a minimum bend radii called out in the AC43.13. I will try to post the clip on my return to the Left Coast in 36 hours.
I am having an early Thansgiving with my son before having to work Thursday so our paying passengers can have theirs.
John C
--
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