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Old 01-08-2012, 05:22 AM
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astronomer1
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Location: Loveland, CO
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Default Throttle Sleeve, ACE OR COX Setup??



I am building an ACE Whizard using a Dickybird TD.049 engine
that is working very nicely. 5.5K to 18K RPM. I am having a problem
with the servo pushrod binding whether I use a Z-bend or a small nylon clevis
with fuel line keeper. On the test stand, I’m using a piece of .032 safety wire
and actuating it by hand and it wants to bend. I want to use ridged
piano wire with the servo.

What is the most effective way of hooking up a servo pushrod
to an ACE or COX throttle ring? I have tried using Z-bent piano wire keeping
the Z-bend tang as short as possible but it still binds with the throttle ring and
the pushrod wants to fall off. The small Nylon clevis with fuel line keeper, binds
either at the fuel line keeper part or the end of the clevis where I have filed it
shorter in an attempt to eliminate binding. I am afraid to file more for fear of
further weakening it.

Perhaps the attached sketch will help further illustrate my problem.
Sorry about the crudeness of the sketches, it is the best I can do using Microsoft Paint.


Attached Images
File Type: jpg
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