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1. 12:05 PM - Re: AN fuel line fittings (Brian Davies)
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| Subject: | AN fuel line fittings |
There are lots of small orifices in fuel systems. That's how carbs work.
(supplying fuel through small orifices). The standard Rotax fuel return
system uses a fuel return through a small orifice.
Regards
Brian Davies
From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of FLYaDIVE
Sent: 06 September 2014 00:41
Subject: Re: RotaxEngines-List: AN fuel line fittings
Guy:
You cannot agree to the corrosion as it is nonexistent. Did you read my
post?
Just in case you missed it:-
Hi Jay & Gaggle:
Brass does not corrode. It can oxidize the same as aluminum, forming Brass
Oxide. As for small orifices - There should NOT be any small orifices in a
fuel system. There is a simple and basic requirement that the fuel line
have a diameter large enough to supply twice the full power hourly fuel flow
of the engine under a gravity feed system. Now, there are BRASS nozzles
used on many Lycoming & Continental engines for the Primer Lines which are
quite small. In the range of 0.060" Diameter. So, once again orifice size
in not an issue. MANY carburetors use brass nozzles and valve seats
internally - So, once again orifice size in not an issue.
Sorry Jay, your information is not correct.
Barry
========================
And if you wonder what my qualifications are for making my statements, I was
a QA Manager and Technical Sales Engineer for a metal coatings company for 8
years and a QA Test Engineer for 20+ working years of my life. Add to that
the little fact about brass being used in carbs for decades you will realize
Jay in incorrect.
Barry
On Fri, Sep 5, 2014 at 7:15 PM, Guy Buchanan <gebuchanan@cox.net> wrote:
I think I agree on the corrosion, unless it's electrolytic. As to the
orifices, there is one in the stock return line. Not sure what size it is,
but it is pretty small, certainly smaller than .06".
Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded
Now a glider pilot, too.
On 9/5/2014 11:59 AM, FLYaDIVE wrote:
Hi Jay & Gaggle:
Brass does not corrode. It can oxidize the same as aluminum, forming Brass
Oxide. As for small orifices - There should NOT be any small orifices in a
fuel system. There is a simple and basic requirement that the fuel line
have a diameter large enough to supply twice the full power hourly fuel flow
of the engine under a gravity feed system. Now, there are BRASS nozzles
used on many Lycoming & Continental engines for the Primer Lines which are
quite small. In the range of 0.060" Diameter. So, once again orifice size
in not an issue. MANY carburetors use brass nozzles and valve seats
internally - So, once again orifice size in not an issue.
Sorry Jay, your information is not correct.
Barry
On Fri, Sep 5, 2014 at 5:47 AM, Jay Hyde <jay@horriblehyde.com> wrote:
Hello Guy,
One problem with brass is that it may corrode in such a way to block your
small orifices- although I think that with fuel it would be ok. The reason
for this is that brass will corrode in the presence of water (as do other
metals, but I have noticed that brass will do that in a pain in the arse way
in particular situations). Because you are using brass in your fuel lines
it shouldn't be a problem- except where you have small orifices.
But it looks as if you have that figured out.
Johannesburg Jay
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From: owner-rotaxengines-list-server@matronics.com
[mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Guy
Buchanan
Sent: 05 September 2014 02:45 AM
Subject: Re: RotaxEngines-List: AN fuel line fittings
Lots of people do, indeed possibly most out there. I used them throughout,
my only question was whether to use aluminum of steel. I used steel and
brass on fuel, and used steel on a couple of the oil lines; the rest
aluminum. Hope it works, as I'm not quite flying yet.
Guy Buchanan
Ramona, CA
Kitfox IV-1200 / 912-S / Warp 3cs / 500 hrs. and grounded
Now a glider pilot, too.
On 9/4/2014 3:00 PM, frank3 wrote:
<mailto:frank3phyl@comcast.net> <frank3phyl@comcast.net>
Has any one gone to the trouble (and expense) of using AN fittings on their
fuel or oil lines, i.e. used Aeroquip or Stratoflex fittings? How'd that
work out for ya?
--------
Frank McDonald
Kitfox S7
912S, Sensenich Composite 3 Blade
Acworth, GA
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