As I understand it, the potential problem with the Factory cables results
---From lack of lubrication and too much friction developing in the wrong
place.
An advantage of the Teflon lined version (with s/s cables) is that the same
level of friction is never going to develop.
Your point about buckling of the unsupported ends is a concern and I tried
to impregnate these with resin to stiffen them up. But failed (probably
didn't get the cable internally clean enough).
Duncan McF.
----- Original Message -----
From: "Erich Trombley" <erichdtrombley@juno.com>
Subject: Europa-List: Throttle Cable
<erichdtrombley@juno.com>
>
>
> A simple modification I made to the standard Europa throttle cable was to
throw the cable in the trash. You can recover the sheath and use it but the
flexible cable must go. Using a flexible cable in the above application
doesn't seem to make much sense. Cables are intended for tension
applications not compression. Given the design of the standard throttle
housing, kinking of the cable is permissible, although certainly not
desirable. If you recall some time ago a Europa was lost due to this very
issue. On an attempted go-around the pilot rapidly advanced the throttle
causing the cable to kink within the housing limiting the throttle command.
The springs on the carb installed by Rotax are designed to advance the carbs
to "High/Full" throttle in the unlikely event of a cable failure. The
springs were never intended to pull the cable through the sheathing which is
what is required to some extent in the Europa design.
>
> I have utilized a Bowden cable of similar diameter which is specifically
designed for push/pull applications. For those not familiar with a Bowden
cable it is basically a semi-flexible solid wire cable. I ordered mine from
ACS p/n 05-1550. One end of the cable will need to be modified to accept
the Europa throttle housing/lever. I bent the end of the wire over a cable
fitting, ACS p/n CF2700, to form an eye and Reduxed the wire to the cable
fitting. This allows a bolt to go through the wire end and attach to the
throttle lever. The other end of the cable is attached to the carbs in the
original manner.
>
> With the above setup the friction lock can be set to provide more friction
than is possible if using the supplied Europa cable, since the carb return
spring is no longer assisting the advance of the flexible cable and kinking
is of no concern. The throttle stays right were it is set. In fact I
rather like the Europa throttle lever with this configuration as the RPM can
set be very precisely. I have 150 hours on the plane and it has worked
flawlessly since day one.
>
> Erich Trombley
> N28ET Classic Mono 914
>
>
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