Fuel pump for Moki 250 radial, yes or no? or maybe both?
04-02-2012, 03:26 PM
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Fuel pump for Moki 250 radial, yes or no? or maybe both?
Hello.
I´m considering buying a Moki/RCS 250 radial, and I have worked myself through most of the huge thread concerning this engine in the "Warbirds" forum.
One thing that many suggests is to use an electric fuel pump, like the APS 380, to stabilise the fuel supply, and avoid the possible problem of a clogged vacuum pulse tube, which could lead to a lean run, and possibly shut the engine down.
When doing so, you are instructed to remove the tubing from the engine driven pump to the carburettor, and rely fully on the electric pump.
In my view you then have exchanged one failure source with another possible source of failure.
If the engine driven pump fails, the engine stops. If the electric fuel pump fails, the engine stops.
Is it not possible, to use both at the same time, thereby providing a much more reliable engine?
Looking forward to your input.
BRGDS
Tinus
I´m considering buying a Moki/RCS 250 radial, and I have worked myself through most of the huge thread concerning this engine in the "Warbirds" forum.
One thing that many suggests is to use an electric fuel pump, like the APS 380, to stabilise the fuel supply, and avoid the possible problem of a clogged vacuum pulse tube, which could lead to a lean run, and possibly shut the engine down.
When doing so, you are instructed to remove the tubing from the engine driven pump to the carburettor, and rely fully on the electric pump.
In my view you then have exchanged one failure source with another possible source of failure.
If the engine driven pump fails, the engine stops. If the electric fuel pump fails, the engine stops.
Is it not possible, to use both at the same time, thereby providing a much more reliable engine?
Looking forward to your input.
BRGDS
Tinus
