Hi Bill,
I like the idea that the sliding block does not have the float valve
that worried you. If it worries you, then it worries me!
Does the Lectron have a float bowl?
Dave McC

Dave,
The Lectron has a conventional float bowl. The unique part of the carb
is that it uses a single, specially tapered central needle for all fuel
distribution. (idle to WOT) This is why I believe Pauls idea about
the Slide Throttle carburetor could be made to work. The only concern I
have for float systems is that they must be kept supplied with fresh
CLEAN fuel. There are many good filters, and running one is needed on a
carb system. You need to fly regularly to be sure the fuel doesn't get
old and produce "gum" by having the light ends evaporate off.

Bill Jepson

This system is easy enough to check on the bench.
You set it up with a typical head of fuel and
use a calibrated beaker to measure the flow as a function
of slide position. Same thing goes for the leaning valve.

One can always heat the slide plates to 200 F with
a hot air blower. I also have a vacuum pump that can
be used.
Paul Lamar

The two strokers even have a small electric coil around the
venturi for heat.  I have seen them for sale on ebay.
The mixture control on the Aerocarb is extremely simple,
maybe even less than $7.  It is a needle valve with the
seat bored into the case at the inlet fitting.  It can rotate
through a quarter arc (90 degrees) with a lever attached
to allow 2.5" of movement.  My vernier mixture control
makes very fine adjustments.

Terry Adams

The simplicity is stunning! Can be easily retrofitted
to our current slide throttle design.

Paul Lamar

Paul,

Wouldn't it make sense to create a venturi on one side of the slide throttle
housing?  The venturi part may be as simple as an add on 1/2 thick  ring
that slips between the manifold and slide throttle.  That way you can use
the tapered central needle with its outlet emptying directly into the
airstream which IMHO is the essence of good fuel vaporization. A small
rectangular header tank could be put on top  of the slide.  Vapor lock
shouldn't be a problem with the tank close at hand. It could be heated for
cold starts and the rely on engine heat for operations. Ethanol ALWAYS needs
preheat on cold days.  About 10 watts I am told.

One challenge would be how to create a linear cam that can depress both
spring loaded needle valves equally and be in sync with the throttle
linkage. More complication.

DougFir

Why? None of the other sliding block carbs have venturi's .

A bit of heat will vaporize the fuel no problem.
My guess is 150 F.

Venturi's have aerodynamic drag.

What needle's? We don't have needle's. No needle's.
This is it. What you see is all you need.

Alcohol is your problem :)

Paul Lamar ...No rotor no motor.

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