--> Europa-List message posted by: Gilles Thesee <Gilles.Thesee@ac-g...>


>That's the reason why the mechanical pump can feed the engine only up to
>~2000m with ~55% power and can works in this situation only as an EMERGENCY
>equipment to bring you with reduced power to an airfield. . (Better than
>nothing!!!)
>
>  
>
Gottfried and all,

Not sure I clearly understand your setup : are you intending to add a
mechanical pump to the two electrical pumps ?
So that is 3 fuel pumps, correct ?
Have you already run your engine with the mechanical pump ? If I recall
correctly, no one mentioned the possibility of upsetting the delicate
enrichment algorithm that protects the engine against detonation. The
need for the wastegate servo "disconnect switch" might come from
instabilities when the TCU little brain loses control.

I tried not to modifiy the Rotax 914, but designed the electrical
architecture so that each pump has a truly independent source of power.
This way I can insure  redundant fuel delivery.

Regards,
Gilles Thesee
Grenoble, France
http://contrails.free.fr



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