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Re: Europa-List: Europa XS Mono Throttle cable friction and jam

Subject: Re: Europa-List: Europa XS Mono Throttle cable friction and jam
From: Alain Chabert <alainchabert@wanadoo.fr>
Date: Sun, 3 Jan 2021 14:19:12
For info, Michel gave me a pair, and since that works perfectly, and 
moreover the balancing of the carburettors is much more stable.
Happy new year

*Alain CHABERT*

e-mail : _alainchabert@wanadoo.fr_
Le 03/01/2021  13:17, davidjoyce@doctors.org.uk a crit:
>
> Michel, I like your solution! Next time my cables give trouble I shall 
> replace them with piano wire facon Auvray.
>
> Bon Annee, David Joyce, GXSDJ
>
>
> On 2021-01-03 10:25, Michel AUVRAY wrote:
>
>> Hello Bud, I send to you my throttle cable solution operative since 
>> 1999 without problem.
>> When I was made my second or third fly with my europa 145, I have the 
>> same problem, the cables bend into the box !
>> Also I applied this radical solution. And I used this solution on 
>> many others rotax engines.
>> If the spring is broken or inoperative, the piano wire performs the 
>> function with great reliability.
>>
>> Lesam. 2 janv. 2021 17:51, Bud Yerly <budyerly@msn.com 
>> <mailto:budyerly@msn.com>> a crit:
>>
>>     Ian,
>>     I believe the Europa Club has a paper I did on throttle cable
>>     installation on their site, it is also at
>>     https://customflightcreations.com/techniques-articles/
>>     <https://customflightcreations.com/techniques-articles/> (I don't
>>     pay google any longer so type in the https://... to find the site
>>     through all the paying ad customers.) If the cable bends in the
>>     throttle box, it is generally not a lubrication problem or even a
>>     sticky oil cable to sheath issue. It is a problem with the cable
>>     installation, most likely a kinked or bound cable. Maintainers
>>     unfamiliar with the Europa often look at the cables and are
>>     appalled that they are loose and not firmly bound all along their
>>     route to the carb. In their attempt for neatness, they bind the
>>     cable(s) and cause them to bind. Builders also fail to get their
>>     initial throttle box alignment correct to prevent the cable(s)
>>     from cleanly entering the sheath from the throttle arm. I
>>     recently scolded one of my clients for allowing a well known
>>     Rotax repair facility touch his cable routing. The repairman
>>     kinked the cables and bound them tightly. It was an older
>>     Classic (20+ years old), so upon installation of his new cables,
>>     all worked flawlessly again.
>>
>>     Cables must be anchored and aligned properly on both ends and
>>     frankly, the area in between must be loopy and only lightly
>>     affixed to prevent interference in the wheel well of the mono.
>>
>>     A new set of cables can be purchased, but still, the running of
>>     the cables, the alignment in the home made throttle box and
>>     fixation to the carby must be addressed.
>>     To supplement my article on "Throttle and choke cable etiquette"
>>     attached, please check the following:
>>
>>     Prior to removing the cables to rebuild them to proper spec. one
>>     can check that the cables are not kinked or tightly bound, the
>>     cable binding nuts on the throttles are lubricated and free to
>>     rotate, and the throttle box cable pivot points on the arm are
>>     free to operate. (The only two points requiring lubrication are
>>     this pivot on the throttle linkage and the box cable pivot
>>     attachment in my opinion.) Look into the throttle box for proper
>>     cable alignment. If issues are found, simply removing the
>>     cable/throttle box to your nice warm workbench and correcting
>>     issues is all that is needed. I find that if the cable itself is
>>     kinked, or unraveled, it is best to replace the cables as it is
>>     not worth the time. If the cable will not operate laid out on
>>     the bench, it won't work in the plane. If you have to tug on a
>>     cable in either direction to get it to move, you have a damaged
>>     sheath. Remember, cable sheaths are just a coil of wire wrapped
>>     around a nylon tube. If the winding is damaged, it squeezes the
>>     inner liner, and the cable will not operate freely in the sheath.
>>
>>     For me, the nylon sheath lined cables require no lube over a
>>     lifetime. (Although I have used a graphite lube to ease
>>     customers fears from the constant complaints of club
>>     members/owners on this subject.) The sheath is lined with nylon,
>>     coiled in stainless, then heat shrink over the top making a dirt
>>     resistant sheath for the twisted wire cable. My old original
>>     Classic cables from 1998 (I'm not sure if they were supplied by
>>     Europa) were damaged by the original builder and were shortened
>>     in length, but alas his technique was poor as the cable sheaths
>>     were bent hard, the cable end cuts were smashed and the cable
>>     attachments were misaligned in the throttle box. So there was
>>     much to correct. Note that if supplied with an aftermarket or
>>     original non lined sheath, they are best replaced as stainless
>>     steel to stainless steel can lead to a corrosion problem
>>     eventually. My 2005 supplied Europa cables have been good now
>>     for 15+ years with only a single light lube of a Teflon or
>>     graphite that was used during inspection (I can't remember what
>>     lube I used on the cloth as I was more interested in corrosion of
>>     the cables here in Florida). The reason I pulled my cables was
>>     for an experiment during my rubber replacement at the 10 year
>>     condition inspection, when I also chose to install a throttle
>>     friction.
>>
>>     Some owner/builders have done solid cables of wire, model
>>     airplane nyrod push pull cables, and Zenith style solid rod to a
>>     welded arm on the firewall that allows both throttles to be
>>     actuated via a short push pull cable. All taking more time,
>>     money and effort than simply following cable etiquette. Read
>>     over the attached paper and check your cables for yourself.
>>     Correct any issues, make sure it works on the bench with the
>>     cables straight, then make a large loop and check again. After
>>     install in the aircraft but not yet attached to the carb arm, the
>>     cables should move freely. If the throttle cables worked on the
>>     bench and not in the aircraft, you've pinched something. I've
>>     found from winter to summer, from minus 10C to plus 40C the
>>     cables work fine from Canada to Florida so they should work for you.
>>
>>     Any cable of twisted wire, solid wire or plastic will do if you
>>     can get the fittings right on the ends and aligned properly. In
>>     experimentation, it takes a keen eye for detail, time, patience,
>>     analysis and money to correct our new designs/mods and get them
>>     working flawlessly.
>>
>>     Best Regards,
>>     Bud Yerly
>>
>>     -----Original Message-----
>>     From: owner-europa-list-server@matronics.com
>>     <mailto:owner-europa-list-server@matronics.com>
>>     <owner-europa-list-server@matronics.com
>>     <mailto:owner-europa-list-server@matronics.com>> On Behalf Of MEE
>>     Sent: Saturday, January 02, 2021 12:52 AM
>>     To: europa-list@matronics.com <mailto:europa-list@matronics.com>
>>     Subject: Europa-List: Europa XS Mono Throttle cable friction and jam
>>
>>     <mailto:macstar1224@gmail.com>>
>>
>>     I had to abort a take-off due to poor acceleration and low
>>     manifold pressure.
>>     Problem was caused by one throttle cable sticking at just above
>>     idle while the other at full throttle!
>>     Even when the cable was lubricated it was still has high
>>     friction. Looks like I need new cables. Think the cable system
>>     needs expandable rubber boots to reduce the amount of grit that
>>     must contaminate the cable runs.
>>     Anyone else had this problem?
>>
>>     --------
>>     Ian McClelland
>>
>>
>>
>>
>>     Read this topic online here:
>>
>>     
>> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fforums.matronics.com%2Fviewtopic.php%3Fp%3D499940%23499940&amp;data=04%7C01%7C%7C49e72240470042cfdcd508d8aee36e03%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637451639107968109%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&amp;sdata=dVOlPJhn9HUqIQ8ni9%2FoEbFFq1R1F9Onh1IQJEPA9fE%3D&amp;reserved=0
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>>
>>
>>
>>
>>
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