Fred;
In regards to to fuel pressure at full boost. On takeoff at full boost the fuel
pressure was 1.7 PSI and no fluctuations
Jim Brown
Jim Brown wrote:
>
> Fred;
>
> With regards to the fuel pressure questions, I monitor my fuel pressure after
the
> fuel has flowed through the fuel pressure regulator on the airbox with an
> additional banjo fitting to which I have attached the line to the fuel
> pressure
> sender.
>
> At sea level the fuel pressure reads about 1.2 PSI and through about 6.000
> feet
> the PSI will vary from 1.2 -1.7 PSI.
>
> At 10.000 to 14.000 feet I usually see about 2.5 to 2.9 PSI
>
> At 17.000 I normally see about 3.5 PSI.
>
> These figures are averaged, as they change slightly on each flight. As far as
> full boost pressures, I will have to get back with you. I have an EIS
> installed
> and the fuel pressure is not on the page I use for takeoff.
>
> Jim Brown
> N398JB
>
> Fred Fillinger wrote:
>
> >
> > Michael Parkin wrote:
> > >
> > > Hi Guys,
> > >
> > > As they say 'Allo Allo'. "Please listen I shall say this only once -
> > > there
> > > is NO restrictor in the return fuel line on a Europa/Rotax 914
> > > installation"
> >
> > We get that on cable in this small part of the States! The show's a
> > riot, say-only-once Michelle is cool, and interestingly self-bashes
> > Brits more than the French. Like "South Park" here with British reserve.
> >
> > Anyway, due to variability of absolute fuel pressure, I did a circuit on
> > "breadboard" that differentially measures fuel pressure (rheostat type
> > sender) verses airbox pressure (electronic sensor, automotive part for
> > turbo cars). It lights one of a strip of green, yellow, and red LEDs,
> > with flashing reds and aural alarm. It works great, but most breadboard
> > kludge ideas do initially. :-)
> >
> > Before I commit to printed circuit board and deal with temp
> > stabilization issues in final components, how does a simple fuel
> > pressure gauge behave on the the 914? From the data in Rotax docs, for
> > most ranges of operation, the reading should be usable. In full boost,
> > does the needle go a little wild? What happens at high altitudes?
> >
> > Best,
> > Fred F.
> >
>
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