Paul,
ST Aviation also offer the alternative of a Floscan sender with their fuel
computer.
If your sender is the same as ST's standard offering, then 'good luck and
stick to Avgas'. There has been one Europa forced landing (='crash', see
AAIB reports) due to the use of one of these particular sensors
(rust/magnetite particles accumulated on the magnets in the sensor, causing
further restriction to the fuel flow) despite a filter being present
upstream. Even without the restrictor jet, the internal bore of the device
is only about 4mm (i.e. the internal step that the jet would sit on, not the
1/4" quoted for the ID of the inlet stub).
PFA Inspectors aren't cleared to sign-off major mods, the definition of
which include such changes to the fuel system, see:
http://www.pfa.org.uk/Engineering%20pdfs/Mods%20and%20Repairs/TL%203.09%20Classification%20of%20Mods%20and%20Repairs.pdf
I also know that PFA Engineering have been less than happy about the use of
one of these sensors on a Jabiru Rans S6; I think this may by now be
cleared. But 80hp only, Avgas usage and much lower 'landing' energy might
have been a consideration in this.
Duncan McF.
----- Original Message -----
From: "Paul Sistern" <paul@sistern.freeserve.co.uk>
Sent: Friday, November 03, 2006 8:47 PM
Subject: Europa-List: Re: Fuel Flow transducer
> <paul@sistern.freeserve.co.uk>
>
> Hi,
>
> I'm a dealer for MGL Stratomaster, see www.partsforaircraft.co.uk I'm
> also a Jabiru builder and owner/flyer (sorry it's not a Europa but my
> garage wasn't big enough). I'm suprised by some of the comments made here
> about the flow sender. The current model being supplied has a fuel bypass
> chamber to prevent blockage should the rotor become jammed. The by-pass
> chamber is clearly visible by looking down the inlet pipe. I have one in
> my aircraft and my PFA inspector has accepted it. It's the same sender
> that ST Aviation (UK Jabiru dealer) supply with their in-house fuel
> computer.
>
> There was an issue with the older style rotating vane senders where no
> facility existed for flow by-pass should the rotor get blocked or jammed
> by debris in the fuel. The PFA required (at the time) a fuel by-pass
> system for that type. In any case, a fuel filter should be fitted in the
> fuel line and it should be installed before the fuel sender regardless of
> type.
>
> Oh, and by the way, the Stratomaster fuel guages will work with any sender
> and the 2 1/4" FF-2 and 3 1/2" FF-3 can handle differential flow created
> by Rotax fuel return.
>
> Regards,
> Paul
> G-CBKY
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=72127#72127
>
>
>
_-
_-
_-
_-
_-
_-
|