Hi John
Thanks for your efforts. I will drop Andy Draper an email at the LAA
and see what the response is to the change of material spec.
Regards
Pete
G-RMAC #109
On 13/01/17 16:58, JohnFrance wrote:
>
> Dear All, I have done further research regarding the manufacture of the
> Classic
fuel filler pipes or "Cobra".
> I must admit I am at a loss as to why the mod 1370 used aluminium 6063 T6 as
it is a pig to bend. All of the companies I have contacted are not optimistic
of the chances of success using this alloy and suggest 5754 H111 which is more
malleable. It is generally used for shipbuilding, food processing and nuclear
components. In this application it is a non structural component.
> I know this might be a problem for UK based owners so perhaps someone would
> like
to "sound out" the LAA about accepting the change of material?
>
> For that reason (depending on the replies I obtain from this email) I will
> pursue
a version using Al 5754 in 50 mm OD with a wall thickness of 2,5 mm which
will weigh a little over 1 kg per cobra.
> I have attached a plan that shows the finished dimensions the tube will have
when manufactured (except the wall thickness which is incorrectly marked as 1.5
mm). The tubes will probably be supplied with the excess length required to
bend the tube and will require cutting back to the right length to suit your
aircraft.
>
> The price per tube should be in the region of 250 Euro depending on the
> quantity,
plus postage.
>
> Seven people have so far shown an interest but only two of them were in the
> list
that was drawn up in 2015 so there may be more of you out there!
>
> Please PM if you are interested?
> Regards
> John
>
> --------
> Europa mono Nr 192
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=465041#465041
>
>
> Attachments:
>
> http://forums.matronics.com//files/mod_1370_556.pdf
>
>
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