I would have to agree with Jose on this.  I am using the aluminum lines in the 
fuselage and a steel braided rubber line with AN fittings from the firewall 
fwd.  My opinion is that barbed fittings may be fine for your lawnmower but not 
at 5000 feet.

Craig
www.kr2seafury.com

--- On Sat, 12/18/10, Dene Collett <av...@telkomsa.net> wrote:

> From: Dene Collett <av...@telkomsa.net>
> Subject: KR> fuel system fittings
> To: "KRnet" <kr...@mylist.net>
> Date: Saturday, December 18, 2010, 10:38 AM
> Guys
> I know this is a contraversal and sometimes touchy subject
> but I need some clarity.
> There is widespread condemnation of the practise of using
> barbed fittings and hose clamps in an aircraft's fuel system
> plumbing. Could somebody in the know please tell me why this
> is so. I can't think of any reason why using a good quality
> reinforced "rubber" hose with fire sleeve over it (forward
> of the firewall) would be in any way inferior to using
> aluminuim piping and AN fittings. In the event of a mishap
> and things move around, I can't see how the solid
> installation will be superior to the rubber hose as it will
> not have near as much flexibility to absorb the movement. I
> would imagine that an aluminuim pipe would be much more
> prone to cracking and leaking when kinked.
> 
> Over here the practise of using barbed fittings and
> flexible hose is almost universal unless you are assembling
> a RV kit which comes with all the appropriate AN fittings.
>  Am I missing something here?
> 
> Regards
> Dene Collett
> Avlec Projects cc
> Port Elizabeth
> South Africa
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