Ing. Gottfried Komaier a crit :
..
> The dependence on electricity is
>the real and only problem of the 914 fuel system, not the PARALLEL -or
>SERIES- design.
>
>
>
Hi all,
Gotfried is right about the real issue on the 914.
The pumps must be fed from truly independant electrical sources. In this
respect, the architecture suggested by Rotax leaves much to be desired.
Concerning the installation of the pumps, Rotax first suggested a
correct parallel setup EXCEPT they forgot about the check valves.
They then suggested the "inline" configuration. It is not a real series,
as the fuel bypasses one of the pump in case of blockage (remember
Pierburg says the pumps are not really transparent). Nothing wrong with
this system. Just a bit tortuous.
Two years ago, we adopted the standard parallel system with check
valves, as suggested in the Pierburg information. The French importer
could not see any reason why we should not do it.
The airplane (not a Europa, I'm afraid ;-) has been flying for one year
now, and has been tested up to FL 145 without any problem, from -14C to
+37C.
I'm crafting a little web summary on this issue.
Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr
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