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1. 06:03 AM - Fuel Flow (Sylvain April)
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Hi all=2C
Just to clarify=2C 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=2C through a gascolator=2C through the fu
el shutoff valve and through a check valve in parallel with a small fuel pu
mp 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=2C this is a recomendation.
I know that when the fuel line is connected to the engine and I am doing my
ground test acceleration runs=2C the engine have all the fuel that it need
=2C the flow must be 155L/hr.
The gravity fuel flow aided by the fuel pump of the engine is more than eno
ugh to maintain 7 PSI at the carburator.
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 th
e 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?
Thanks
Sylvain April
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