For what it is worth for the discussion, which I have not followed closely:
If you use the standard Europa supplied restrictor in the fuel return line
---From 912S, the return flow is an amazingly high 10 liters (approx) / a
little less than 3 USG per hour even with full fuel tank pressure head on
the return line.
I use a Flowscan (don't have the type at hand) in only the supply line. For
instantaneous fuel consumption reading I have a valve on the return line
that I close. The reading then drops about 10 liters/hour after it has
stabilized (takes a few seconds due to the design of the engine driven fuel
pump). The flow reading is accurately calibrated. I close the valve only
at level flight at low to medium altitude to minimize the risk of vapour
lock.
Svein
LN-SKJ
-----Opprinnelig melding-----
Fra: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] P vegne av rampil
Sendt: 23. april 2009 13:53
Til: europa-list@matronics.com
Emne: Europa-List: Re: Fuel return line attachment point with 912UL
Hi All,
I know this has been discussed before, but the present discussion
seems to discount the fact that the 912s and the 914 return fuel
quantities are quite different. The 914 has a continuous, significant
return flow while the 912s has a negligible return flow. My
suspicion is that the flow rate in a 912s is below the range of accurate
measurement of a 201b floscan.
--------
Ira N224XS
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