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1. 05:11 AM - Re: Fuel connection layout (rweber)
2. 06:04 AM - Re: Fuel connection layout (George)
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| Subject: | Re: Fuel connection layout |
Thanks for your quick reply! Now the things are clear to me and I can go on.
Thanks,
Robert
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501329#501329
Message 2
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| Subject: | Fuel connection layout |
Walter,
There never was a return line from the carburetor. The Yak 52 and other aerobatic
aircraft had a return system to reduce the chance of an air bubble or vapor
getting to the carburetor. They had a header tank as well as a spherical tank
the we called the de-bubbler.
We always recommended a similar system for the homebuilt aircraft as well. Usually
an upside down gascolator and a return line to the tank or header tank through
a .40 restrictor.
George
-----Original Message-----
From: owner-m14pengines-list-server@matronics.com <owner-m14pengines-list-server@matronics.com>
On Behalf Of Walter Lannon
Sent: Friday, April 9, 2021 12:24 AM
Subject: Re: M14PEngines-List: Fuel connection layout
--> <wlannon@shaw.ca>
George, Richard;
Please enlighten me regarding fuel return from the M14 carb. I had not yet seen
such an item nor can I find anything that even resembles a fuel return outlet.
I closely examined 3 M14P's today including a new, never flown, Series 2 which
I am currently installing on a CJ6.
Negative; Fuel intake wise they are all identical. The only "fuel return"
is to the pressure indicating system and that of course comes from the fuel pump,
not the carburetor.
What would be the purpose of a carburetor fuel return given that the standard rotary
fuel pump relief valve by-passes all excess fuel internally?
Best;
Walt
-----Original Message-----
From: George Coy
Sent: Thursday, April 08, 2021 5:31 AM
Subject: Re: M14PEngines-List: Fuel connection layout
--> <george.coy@gmail.com>
Richard, I beg to differ with you on this particular engine. It is an M4 62 which
is basically at AI 14 engine with M 14 P cylinders. As you probably realize
the AI 14 did not have a fuel return system. The fuel pump has a regulated pressure
and thats all its needed. None of the yak 12s, PZL 101s Wilgas etc. had
any fuel return system. There was a hard line between the outlet of the fuel
pump in the inlet of the carburetor. The only other connection to the carburetor
was for the fuel pressure.
In my experience The fuel return system was for aerobatic aircraft and was
more to remove air bubbles from the system.
George Coy
Sent from my iPhone
> On Apr 8, 2021, at 6:09 AM, Richard Goode
> <Richard.goode@russianaeros.com>
> wrote:
>
> <richard.goode@russianaeros.com>
>
> Yes, the design of these carburettors is that they accept fuel until
> they are full in the fuel chamber and then the excess returns to the
> tank, and this should be plumbed in in this fashion, otherwise too
> much fuel will be in the carburettor and causing a mixture that is too
> rich. The larger connection is the primary supply from the fuel pump
> and then the smaller connection is a return to the tank.
>
>
> RICHARD GOODE AEROBATICS
> Rhodds Farm, Lyonshall, Hereford, HR5 3LW, UK
> Tel: +44 (0)1544 340120 Fax: +44 (0)1544 340129
> e-mail: richard.goode@russianaeros.com www.russianaeros.com WORLD
> LEADERS IN RUSSIAN SPORTING AIRCRAFT & ENGINES In partnership with
> Aerometal Kft, Hungary.
>
> -----Original Message-----
> From: owner-m14pengines-list-server@matronics.com
> <owner-m14pengines-list-server@matronics.com> On Behalf Of rweber
> Sent: 08 April 2021 10:46
> To: m14pengines-list@matronics.com
> Subject: M14PEngines-List: Fuel connection layout
>
> --> <rweber@easy-surf.net>
>
> Hello all,
>
> first a friendly hello to you all, I'm new to this forum. My name is
> Robert and I'm from the south of Bavaria.
>
> I have been the proud owner of an M462RF for a couple of weeks now.
> It's not intended for use in an aircraft, but it should run on a test
> stand for demonstration purposes. Construction is progressing well,
> but I'm not entirely sure about the routing of the fuel lines. As far
> as I understand, the path is from the tank to the fuel pump and on to
> the carburetor. I also have a connection for the pressure gauge on the
> carburetor and a drain connection on the fuel pump.
>
> What I am missing is a connection for a return line (from the
> carburetor?) though some kind of flow throttle back to the tank. Or is
> that not necessary?
>
> with kind regards,
> Robert
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=501309#501309
>
>
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