Frans, My 914 with JPI 450 and 2 Floscan 201 A6 (PN201-031-00) transducers
actually consumes 30 l/hr at 164 knts/5500RPM/34.7in MP at 6500ft. Part of
the testing to satisfy the PFA/LAA involed fuel flow tests by disconnecting
the return hose and seeing how much came out with one or 2 pumps going. I
can't find the work sheet with the precise figure, but I know the answer
came out at something like 2 and a bit l/min and my inspector was entirely
happy. The actual flow rate is of course regulated largely by the pressure
release valve. My reading before fitting these transducers convinced me that
they were the gold standard, fitted to the bulk of certified aircraft that
have fuel flow systems. Regards, David Joyce, G-XSDJ
----- Original Message -----
From: "Frans Veldman" <frans@paardnatuurlijk.nl>
Sent: Tuesday, October 07, 2008 12:09 PM
Subject: Re: Europa-List: FloScan sensors; which model?
> <frans@paardnatuurlijk.nl>
>
> G-IANI wrote:
>> At full boost the 914 takes 28 LITRES per hour so well within the rang of
>> the sensor.
>
> If there were no return line, yes. But if the whole system pumps 120
> litres per hour, the first flow sensor sees 120 litres passing, and the
> one in the return line sees 92 liters passing. The consumption is then
> 28 litres indeed, but this is not what is actually flowing through the
> sensors.
>
> Hence my question whether the flow sensors are not a little bit on the
> small side.
>
> Frans
>
>
>
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