|
Hi John,
There has been some debate about where the filter should
go. Some folks feel its purpose is to protect the pump and place it before
the pump, others feel it is to prevent clogging of the fuel injector screens and
place it after.
I personally believe placing a high pressure filter
after the pump is the preferred solution. I use a coarse
filter
(wire mesh) before the pump to keep any large foreign
matter out of the pumps. If your injectors clog it doesn't matter what
kind of filter you have before the pump or how well the pump is protected.
Others will argue that a fine filter before the pump protects both - unless of
course the pump starts to shed material.
One thing to consider is that a filter of any kind will
cause a pressure drop, the finer it is (and therefore the more restrictive) the
more of a pressure drop. Pressure drops before the intake of a pump can
lead to cavitation and formation of bubbles in the fuel line leading to "vapor
lock".
In the auto, the screen inlet in the tank acts like a
coarse filter ( before the pump) and the filter outside the tank is a finer
filter.
There you have my 0.02 on the topic
Ed
----- Original Message -----
Sent: Wednesday, March 07, 2007 9:50
AM
Subject: [FlyRotary] fuel filter
Looking at the pictures of fuel filter, pump
installations, the filter is after the pump. In auto installations the
pump in tank has a screened inlet and then filter someplace between the pump
and the injection system. The plane has a gascolator and do I place the
pump next like auto installations, then into the filter like the auto
installations, or why not. JohnD
|