Today's Message Index:
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1. 09:03 AM - Re: longest pneumatic line (Warren Hill)
2. 09:24 AM - Re: longest pneumatic line (doug sapp)
Message 1
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| Subject: | Re: longest pneumatic line |
Walt,
Over the years Ive used and looked at many different types of tubing. Agree. Thin
wall aluminum tubing is basically a disaster with a short fuse. The base of
the flare is invariably the weakest point and failures in this location are common...
if not inevitable. Other, workable solutions like 6 mm alloy brake line
are sturdy and certainly capable of handling higher pressures, but a small
amount of copper content can lead to corrosion within the system. I believe the
inch x 0.049 tubing is the way to go. It works fine with the B-nuts and collars
that we already have. The main difference is that bending and flaring take
more care than with soft aluminum. Assembly oil on the flaring tip is helpful
and bending the tubing slowly works best.
Warren Hill
N464TW
Mesa, AZ
> On Jul 23, 2019, at 8:25 PM, Walter Lannon <wlannon@shaw.ca> wrote:
>
>
> Hi Warren;
>
> That is actually a pretty fair price for 1/4" X 0.049" 5052!
>
> The standard and most used 1/4" X 0.035" (while a whole lot cheaper) actually
does not meet the strength requirements of the stock 6mm X 1mm CJ tubing.
Assuming of course that the material spec. is equivalent and I have no reason
to believe otherwise.
>
> I used to maintain a stock of 1/4" X 0.049" for a batch of Harvards & T6's. Required
for the 1200 psi hydraulic system. Sometimes had a hard time finding
it!
>
> Cheers;
> Walt
>
> -----Original Message----- From: Warren Hill
> Sent: Tuesday, July 23, 2019 4:01 PM
> To: yak-list@matronics.com
> Subject: Re: Yak-List: longest pneumatic line
>
>
> Jon,
>
> Aircraft Spruce has exceptionally high quality inch 5052-0 aluminum tubing that
is almost as stiff as stainless steel.
>
> Here are the numbers:
>
> OD: 0.250
> ID: 0.152
> Thickness: 0.049
> Length: Comes is 6 ft. sections, but will ship this in 12 ft. sections if you
want.
> Part Number: 03-39250-12
> Price: $28.80 for 6 ft.
> $57.60 for 12 feet.
> Web: https://www.aircraftspruce.com/catalog/mepages/alumtube_5052.php
>
> The advantage of using tubing is that 37 flaring tools are readily available.
Imperial stopped making a 37 flaring tool for 6 mm tubing a few years back.
>
> Hope this helps.
>
> Warren Hill
> N464TW
> Mesa, AZ
>
>
>
>> On Jul 23, 2019, at 11:41 AM, Jon Boede <jonboede@hotmail.com> wrote:
>>
>> I have a chance to get some original pneumatic tubing into a container coming
from Poland.
>>
>> The guy is going to send straight pieces and wants to know how long... I told
him at least two pieces 4 meters long. Should I tell him 5? Anybody have a
feel for what the longest run of tubing is in the CJ? I want to just have stock
for the future so there's not something specific I'm fixing now.
>>
>> Jon
>
>
>
>
>
> ---
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Message 2
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| Subject: | Re: longest pneumatic line |
Walt,
Sorry I must disagree.
In the past I have received 6mm tubing direct from the factory--COILED, but
what do they know right??
"O" condition (very near the same as our 5052) is VERY amenable to coiling,
far superior to any of it's "tempered" brethren in this respect. I can see
no problem with a big lazy coil other than having to listen to grumpy old
mechanics piss and moan about the slight inconvenience of having to
straighten it back out. =F0=9F=98=81
But in the situation at hand it seems he is shipping for free so we'll just
have to hope he is getting enough to keep us all supplied!!
Doug
On Tue, Jul 23, 2019 at 8:03 PM Walter Lannon <wlannon@shaw.ca> wrote:
> Jon;
>
> I don=99t know off hand what the longest line is in the CJ but, as
Doug
> noted, shipping 4 m (12.5 ft.) lengths will be very costly. I would thin
k
> cutting in half would cover for most of the CJ.
> Is this the standard 6mm X 1mm tubing ? If so I would not recommend
> attempting to coil it for shipping. This is a high quality tubing which
I
> believe is a direct equivalent to our 5052 =9CO=9D cond. stan
dard. It is not
> amenable to coiling!
> The junk you can buy in a coil is thin wall 3000 series alum and is not
> acceptable for use in any pressurized aircraft system.
>
> Walt
>
> *From:* Jon Boede <jonboede@hotmail.com>
> *Sent:* Tuesday, July 23, 2019 11:41 AM
> *To:* yak-list@matronics.com
> *Subject:* Yak-List: longest pneumatic line
>
> I have a chance to get some original pneumatic tubing into a container
> coming from Poland.
>
> The guy is going to send straight pieces and wants to know how long... I
> told him at least two pieces 4 meters long. Should I tell him 5? Anybod
y
> have a feel for what the longest run of tubing is in the CJ? I want to
> just have stock for the future so there's not something specific I'm fixi
ng
> now.
>
> Jon
>
>
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