The Murphy Builders Site

If I remember, the required test is to have the airplane in flight attitude and show that the system, at the carburetor, will flow 50% of the maximum power fuel flow. To be conservative, I would test with minimum fuel in the tank and also at maximum expected climb angle which diminishes the pressure head above the carb. Best to determine adequate flow on the ground rather than determine insufficient flow in the air.
Ralph Baker



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I've never heard of this test, is it required in US? What kind of device
required to do it? Is it a tool or something that stays on the plane?
Thanks,
Mike Betti
771E

Mike: In Canada a fuel flow test is required prior to final
inspection and
must produce 150% of fuel required for maximum take off
consumption if it is
a gravity feed system and 125% if using fuel pumps. This test is
easy to do
by simply disconnecting the fuel line just before the carb, open
the fuel
cocks and collect fuel for one minute. Multiply by 60 and you have
your
hourly fuel flow. The only device you need is a measuring cup and
a
calculator. Hope this helps. - Bob J
----- Original Message -----
From: <mbetti@up.net>
To: <rebel-builders@dcsol.com>
Sent: Thursday, December 29, 2005 2:26 PM
Subject: Re: fuel flow test

I've never heard of this test, is it required in US? What kind

of device

required to do it? Is it a tool or something that stays on the

plane?> Thanks,

Mike Betti
771E

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At the same time your doing fuel flow test, you can figure out what your UNUSABLE fuel will be. Just something else you might want to know.

Jeff


----- Original Message -----
From: Robert and Olga Johnson <rjohnson18@cogeco.ca>
Date: Thursday, December 29, 2005 12:06 pm
Subject: Re: fuel flow test

Mike: In Canada a fuel flow test is required prior to final
inspection and
must produce 150% of fuel required for maximum take off
consumption if it is
a gravity feed system and 125% if using fuel pumps. This test is
easy to do
by simply disconnecting the fuel line just before the carb, open
the fuel
cocks and collect fuel for one minute. Multiply by 60 and you have
your
hourly fuel flow. The only device you need is a measuring cup and
a
calculator. Hope this helps. - Bob J
----- Original Message -----
From: <mbetti@up.net>
To: <rebel-builders@dcsol.com>
Sent: Thursday, December 29, 2005 2:26 PM
Subject: Re: fuel flow test

I've never heard of this test, is it required in US? What kind

of device

required to do it? Is it a tool or something that stays on the

plane?> Thanks,

Mike Betti
771E

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Mike: In Canada a fuel flow test is required prior to final inspection and
must produce 150% of fuel required for maximum take off consumption if it is
a gravity feed system and 125% if using fuel pumps. This test is easy to do
by simply disconnecting the fuel line just before the carb, open the fuel
cocks and collect fuel for one minute. Multiply by 60 and you have your
hourly fuel flow. The only device you need is a measuring cup and a
calculator. Hope this helps. - Bob J
-

From: jimsrebel@dcsol.com
Reply-To: <rebel-builders@dcsol.com>
To: rebel-builders@dcsol.com
Subject: Re: fuel flow test
Date: Thu, 29 Dec 2005 13:57:09 -0900

If your Carb has a drain plug in the float bowl, remove drain plug and
check
the flow rate at this point. This will also test the flow rate through the
needle and seat. If you have a freshly overhauled Carb using the input fuel
line will still be a safe bet, but a lot of the engines that find their way
onto a homebuilt have been stored for a long time. Plus it will never hurt
to
flush out the carb real good before you fly it.

Jim L.

On 12/29/2005 11:06 AM, rjohnson18@cogeco.ca wrote to rebel-builders:

-> Mike: In Canada a fuel flow test is required prior to final inspection
and
-> must produce 150% of fuel required for maximum take off consumption if
it
is
-> a gravity feed system and 125% if using fuel pumps. This test is easy to
do
-> by simply disconnecting the fuel line just before the carb, open the
fuel
-> cocks and collect fuel for one minute. Multiply by 60 and you have your
-> hourly fuel flow. The only device you need is a measuring cup and a
-> calculator. Hope this helps. - Bob J
-> ----- Original Message -----
-> From: <mbetti@up.net>
-> To: <rebel-builders@dcsol.com>
-> Sent: Thursday, December 29, 2005 2:26 PM
-> Subject: Re: fuel flow test
->
->
-> >
-> > I've never heard of this test, is it required in US? What kind of
device
-> > required to do it? Is it a tool or something that stays on the plane?
-> > Thanks,
-> > Mike Betti
-> > 771E
-> >
->





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