FWIW:
Understanding the reasoning behind the solid wire, I first replaced the broken
solid (which by the way over-powered the carbs throttle spring and stuck it at
the 20% throttle level) with another. Examining the routing of the classic,
the bends are too tight for solid wire, its friction too high, and inducing
fatigue
cracking of the solid wire. I sourced teflon-coated bicycle stranded cable,
modified the ends appropriately, lubed them up with teflon spray and installed
them. Repeated tests of slamming the throttle forward did not induce any
kinking in the throttle box, as the stock rotax springs have adequate tension
to pull consistently. I did however have to tighten the throttle box friction
pivot to keep the throttle from creeping from the same spring tension.
Bottom line, at least in my Classic, which has unavoidable tight bends, the
throttles
are smooth as silk, and the balancing was easy and has remained constant
in the 50 hours so far (knock on wood).
Just wanted to throw my experience out there fwiw. Im just ecstatic that the
solid
wire broke on the ground (with a passenger) and I didnt lose power in the
climb.
Cheers and blue skies,
Pete
> On Jun 11, 2020, at 4:54 PM, h&jeuropa <butcher43@att.net> wrote:
>
>
> We installed solid wire throttle cables during our initial build. We did it
> because
there were a couple instances where pilots tried to add throttle quickly
and the wire cables kinked in the throttle box and jammed.
>
> We tried to purchase piano wire to fit in the Europa supplied cables but we
> were
unable to straighten it so that it worked properly. We purchased complete
cables from Aircraft Spruce and have never had a problem. We did have to devise
fittings at each end. As Gilles points out, our carbs stay in sync from
year to year too.
>
> Jim & Heather
>
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>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=496780#496780
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