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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