Subject: Duel Fuel Filters - Velocity
From: ACRE NL
Date: 1/8/2003, 4:15 PM


     No but I will take another look. I think you are right. Why two?
     I suppose one for each fuel tank.

     Paul Lamar

     It occured to me that there may be good reason for two filters (with fins).  Can't tell
     from the pic, but probably one on the supply line; one on the return.  Two reasons - one
     is the velocity RG has about 4.5 ga. sump tank, and the fuel return from the FI system
     is normally back to the sump.  If you are #10 in line for takeoff, say 20 minutes,
     you've recirculated most of that fuel about five times; heating it some each time.  The
     filter/cooler could help keep the temp down if there is some reasonably cool air around
     those fins.

     The second reason is that there are generally small bubbles of volitile fractions
     returning downstream of the pressue regulator which result in fluctuations in a flow
     meter readings, and foam over the fuel in the sump.  The filter/cooler can provide for
     removing (recondenseing) the bubbles.

     Al


 
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