>
> >>> > I have decided to make a simple carb for those people that
> >>> > don't want to deal with EFI. It is a real shame that one needs
> >>> > a degree in electrical engineering to tune and install
> current
> >>> EFI > products.
> >>> > Anybody can understand a carb. The leaning system uses an
> >>> eccentric > shaft
> >>> > just like the rotary to change the float level. Super simple.
> >>> >
> >>> > I stole an idea from Weber carbs. There will be two small
> venturis>>> > that do the fuel metering. Can't beat a simple
> system like that.
> >>> > Internal fuel passages are not shown yet for the most part.
> >>> >
> >>> > Hopefully Larry will build it and sell it. I am sure he
> will have
> >>> > a lot of suggestions for improvements.
> >>> >
> >>> > This carb works with Doc's slide throttle as is. It is
> merely bolted
> >>> > to the side of the slide throttle.
> >>> >
> >>> > This is a low technical risk solution. Guaranteed to work right
> >>> > out of the box. No innovation here.
> >>> >
> >>> > Paul Lamar ...No rotor no motor.
> >>>
> >>> Excellent idea. Add a simple crank trigger ignition.
> Forget the
> >>> computer. Jerry
> >>
> >> It is too late for me, but I like it.
> >> Buly
> >>
> >> Your decision has convinced me it is the way to go.
> >>
> >> Here is what the outside looks like. Hey you should have
> asked me for
> >> help
> >> on the wiring. I would have made you a whole new wiring
> harness for free
> >> and flown down there and installed it for you :)
> >
> > > Paul Lamar
> >
> >
> > Paul,
> > Why not copy a Tillotsen diaphragm carb from the old days of
> go-kart
> > racing. Then you would not have the bowl full of fuel and the
> delicate> float mechanism to worry about. Your mixture cam
> could bear on a spring
> > against the diaphragm. Using the diaphragm as a regulator, I
> think you
> > could meter fuel directly into the slide throttle. Think
> about the
> > Bendix pressure injection carbs.
> >
> > Aubrey Thompson
> >
> > That is an interesting idea Aubrey. Thanks for the tip. I am
> looking
> > into it.
> > Here is a very good site on the subject.
> >
http://www.aerocorsair.com/id27.htm
>
> Paul,
> Here is a diagram of the fuel flow through the small, HU series carb
> that does not have the fuel pump diaphragm.
>
> Aubrey Thompson
>
> Yes that is a much better illustration of how it works. It is
> also a good
> illustration of why you don't want butterfly valves in an
> aircraft engine
> that runs wide open throttle 99% of the time.
>
> I wonder if that simple main adjustment needle valve will do the
> job of leaning.
> I suspect the other needle is an idle mixture adjustment.
> Probably not needed
> in a rotary that idles at 2000 RPM.
>
> Thanks for suggesting this Aubrey. I am liking it more and more.
> Super simple and super compact.
>
> Paul Lamar ...No rotor no motor.
Just a thought BMW make fine carbs and I believe altitude is not a
problem with them. But might be too small. Worth a search in any
case. Thanks Paul for the newsletter :))
Marc J
Nexus mustang
What we need is more than altitude compensation.
We need leaning and the vast majority of automotive carbs
don't have that feature. Also BMW carbs are likely to be very expensive.
Here are some more Tillotson illustration.
Looks like we will need a primer for starting.
Paul Lamar ...No rotor no motor.
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