sapril001(at)hotmail.com
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 Posted: Tue Apr 12, 2011 5:03 am Post subject: Fuel Flow |
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Hi all,
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Just to clarify, my 133L/hr is free flow from the wing tanks measured at the firewall connection flowing in a jerrycan. The fuel goes from the tank through the wing isolation valves, through a gascolator, through the fuel shutoff valve and through a check valve in parallel with a small fuel pump used for primer pressure.
This flow is just driven by the head of the fuel tank located in the wings. It should be 125% of the max engine flow, this is a recomendation.
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I know that when the fuel line is connected to the engine and I am doing my ground test�acceleration runs, the engine have all the fuel that it need, the flow must be�155L/hr.
The gravity fuel flow aided by the fuel pump of the engine is more than enough to maintain 7 PSI at the carburator.�
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My question is: should I modify my piping to ensure a free flow of 125% of the maximum that the engine use at take off.
My understanding of this recomendation is that when an airplane is aging the various strainer will get�clogged and the flow�could be reduced�enough to cause vapor lock problems.�
Does anyone know if the M14P fuel pump is suceptible to cavitation problem if the suction pressure is to low?
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Thanks
Sylvain April
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