Subject: Slide Throttle
From: Rotary Engine
Date: 2/4/2006, 8:44 PM
To: AA-me



I got the slide throttle completely installed, including the belt shield
/ anchor point.  Operates silky-smooth -- almost too silky smooth; I
don't have a friction nut on the throttle knob & kind wish it had a bit
more resistance.

Here's a lesson learned: The first time I installed the assembly, I
completely reattached all the intake manifold pieces.  This was a
mistake as I had no way to confirm exactly when the slide was in the
full-open position matching the full open throttle knob position.  The
design of the slide throttle body is such that the plate can be beyond
full open -- this would make for some confusing RPMs as the RPM peaked
shy of "wide open" and then started falling off as the knob was advanced
further.

In any case, the solution is to assemble the intake temporarily without
the cover plate.  There was no tendency for the slide to fall out, and I
could directly fine-tune the attach nuts until full-open was exactly
full-open.  I also got to ooo and ahhh as the plate dutifully went back
& forth.  Hey - I've been building this %#%$ airplane for  2 years now;
gotta take joy where you can find it...

I am very satisfied with the simple belt shield / anchor point I
fabbed.  Naturally, I neglected to take a photo of it while fully
installed, but attached is a shot after I disassembled it to start
working on the radiator -- it's at the very top.  I made it out of .050
AL bent as pictured.  It connects directly to the slide throttle body
using the six aft-most body bolts.  It took all of 10 minutes to make,
but I think will do the job.  Helpfully, it does not interfere with
either the intake or output of the water pump.

Mark Supinski

Don't get too excited Mark. When the engine is running there is
considerable vacuum on the engine side of the throttle stiffening it up
a bit.

Paul Lamar ...No rotor no motor.

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