Yvon,

The pressure should be the same in the line from the pump to the pressure
regulator. The flow is relatively small so the pressure losses from the pump
are small along that line and the pressure at the fuel rail is dictated by
the regulator. We are talking less than 0.1 psig if that from the pump.

Alain





-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]On
Behalf Of Yvon Cournoyer
Sent: July 17, 2007 5:14 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] FUEL SYSTEM PRESSURE


One question which is bothering me concerning pressure in my fuel
system. The distance between the inline fuel pump and the throttle body
where the pressure regulator is located is about 16 feet. The pressure
sender is located about 6 feet before the pressure regulator. The fuel
lines are 3/8 inch inside diameter throughout. The fuel is gravity fed
about 11or 12 inches to the fuel pump which pushes it  to the fuel
regulator and throttle body, activating the pressure sender on the way..
Is the fuel pressure the same at the pump outlet, the sender and the
regulator? Yvon.


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