Subject: Slide throttle binding
From: Rotary Engine
Date: 4/2/2006, 10:19 PM
To: AAme


    Hi Paul-

    Final install of the slide throttle turned up a failure mode I hadn't
    expected, although it is obvious now.

    The hole the throttle cable enters the slide body through is a fairly
    close fit.  If the throttle cable is not perfectly in line with the
    hole, the throttle cable will bind in the hole, making moving the cable
    very difficult.  In my case, it made achieving WOT very difficult.

    So -shall I enlarge the hole to prevent binding & call it good, or do I
    need to find a nylon insert to allow a close fit w/o allowing binding to
    occur?



    Mark Supinski

    So I am not sure I understand the problem.
    Is there no room in front of the firewall to allow the installation
    of a bracket that will hold the outer jacket of the push pull
    cable in perfect alignment? Can you take a few pictures?

    Is this bracket not working for some reason?

    Do you need to put a hole in the firewall?

    Perhaps you need larger holes in the bracket it self
    that holds the throttle cable so the entire bracket
    can be adjusted.

    Of course a slightly larger hole for the push rod
    to go through should not hurt. I am just trying to understand
    the problem.

    Paul Lamar ...No rotor no motor.


Your suggestion of options is correct.  The bracket has a little flex to
it & after getting everything mounted it has flexed a little.  But the
tolerance as-is is very tight -- if I flex the mounting bracket back
just a hair (we're talking between 1/32 and 1/16) it unbinds and works
fine.  Anything else & it won't stay at WOT -- so I worry about having
something nicely aligned on the ground & becoming un-aligned while
bumping around in the air.  So, making the hole bigger is an easy fix.

No pix right now, but I'll take some next time I am out there.

Mark Supinski

Just make a similar bracket out of thicker stuff.
Some hardware store 1 1/2" by 1 1/2" extruded aluminum angle bolted
together with 10-32 screws might work. Extend the angles
far enough forward to pick up two bolts at both top
and bottom. You can trim excess material off the angles.


I guess in the next iteration we can extend the front and
back plates out to hold the outer housing of the throttle
cable. What say you Tom?

Paul Lamar ...No rotor no motor.

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