Today's Message Index:
----------------------
1. 04:56 AM - Re: Engine Life - "On Condition" (Thom Riddle)
2. 08:14 AM - bowden cable "grab point" on 912 UL. (ejessee)
3. 08:41 AM - Re: bowden cable "grab point" on 912 UL. (Robert Borger)
4. 12:41 PM - Re: bowden cable "grab point" on 912 UL. (PHILLIPS I)
5. 02:52 PM - Re: bowden cable "grab point" on 912 UL. (ruruny@aol.com)
Message 1
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| Subject: | Re: Engine Life - "On Condition" |
Conrad,
I have no statistics for you but except on type certificated aircraft or SLSA which
REQUIRE replacement of some parts on a calender time basis, I use "on condition"
replacement for most parts. The exception are those subject to high stress
and high probability of fatigue failure over time or those parts which are
difficult(expensive) to get to and I have current easy access to them.
A good example of this is a Jabiru 2200 solid lifter engine with a little over
ten years in service. Last week we did a thorough engine inspection while it was
off the airframe during and engine mount replacement due to damage in an accident.
The rubber socket that connects the Bing 94 carb to the intake manifold
is supposed to be replaced on a two year calendar basis, according to Jabiru.
After ten years in service (but only about 200 hours) one end is beginning to
show some minor cracks from aging. I ordered a new one. If it had been replaced
every two years, it would not need replacement now, but the owners would have
been out an extra $250 or so for unnecessarily replaced parts.
Successful on-condition replacement requires proper and timely inspections but
it can save the owner significant amounts of money over the long term without
sacrificing safety. In fact, it can sometimes improve safety for two reasons.
One, a part already proven in service will not suffer what I call bad-new-part
syndrome. Two, mechanics are not perfect and sometimes make mistakes when replacing
parts. If proper inspection of a part can be done without disassembly then
not replacing a good in-service part can reduce the risk of mechanic error.
I'm not preaching against replacement of parts on a calendar basis but tell customers
that is is optional when it is legal to do so.
Thom Riddle
http://sites.google.com/site/riddletr/a&pmechanix
--------
Thom Riddle
Buffalo, NY (9G0)
Kolb Slingshot SS-021
Jabiru 2200A #1574
Tennessee Prop 64x32
Don't accept your dog's admiration as conclusive evidence that you are wonderful.
Ann Landers
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=330409#330409
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| Subject: | bowden cable "grab point" on 912 UL. |
Hello,
I have purchased some length of throttle cable from Aircraft Spruce. I need to
replace the cables between my throttle "rocker arm" and each carb on my 912 UL
(mounted on CH 701). As the throttle application is "pull only", there is a
single "grab point" on each of the old cables where the rocker catches when pulling
the throttle back. This grab point looks like a little billet of lead.
How can I add such to the new cable? I have looked through Aircraft spruce
and have found no item that seems to be intended for this. What have others
done.
Thanks for your help.
--------
Ernest Jessee
N4931M
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=330449#330449
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| Subject: | Re: bowden cable "grab point" on 912 UL. |
Ernest,
I'm not a CH701 fellow so I don't know for sure about your installation. But from my experience with my Europa, I think that what you see on the end of the cable is the equivalent of the Nicopress Stop Sleeve. See: http://www.aircraftspruce.com/catalog/appages/nicopress.php at the bottom of the page.
It's not really a "grab point" as much as a device to prevent the cable from completely
pulling loose should the tightening screw of the cable holder on the
carb become loose. If the cable holder should become loose, this stop sleeve
allows you to retain enough control of the engine to get safely on the ground.
You Rotax and CH701 folks chime in if I have this wrong!
Blue skies and tailwinds,
Bob Borger
Europa Kit #A221 N914XL, XS Tri-Gear, Intercooled 914, Airmaster C/S Prop
http://www.europaowners.org/forums/gallery2.php?g2_itemId=60232
http://www.biplaneforumgallery.com/index.php?cat=10046
Europa Flying!
3705 Lynchburg Dr.
Corinth, TX 76208
Home: 940-497-2123
Cel: 817-992-1117
On Feb 10, 2011, at 10:11, ejessee wrote:
>
> Hello,
> I have purchased some length of throttle cable from Aircraft Spruce. I need
to replace the cables between my throttle "rocker arm" and each carb on my 912
UL (mounted on CH 701). As the throttle application is "pull only", there is
a single "grab point" on each of the old cables where the rocker catches when
pulling the throttle back. This grab point looks like a little billet of lead.
How can I add such to the new cable? I have looked through Aircraft spruce
and have found no item that seems to be intended for this. What have others
done.
>
> Thanks for your help.
>
> --------
> Ernest Jessee
> N4931M
Message 4
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| Subject: | Re: bowden cable "grab point" on 912 UL. |
Bob i think you are right, I have put some heat shrink on my cables for
exactly that reason,
regards
Ivor
On 10 February 2011 16:32, Robert Borger <rlborger@mac.com> wrote:
>
> Ernest,
>
> I'm not a CH701 fellow so I don't know for sure about your installation.
> But from my experience with my Europa, I think that what you see on the end
> of the cable is the equivalent of the Nicopress Stop Sleeve. See:
> http://www.aircraftspruce.com/catalog/appages/nicopress.php at the
> bottom of the page.
>
> It's not really a "grab point" as much as a device to prevent the cable
> from completely pulling loose should the tightening screw of the cable
> holder on the carb become loose. If the cable holder should become loose,
> this stop sleeve allows you to retain enough control of the engine to get
> safely on the ground.
>
> You Rotax and CH701 folks chime in if I have this wrong!
>
> Blue skies and tailwinds,
> Bob Borger
> Europa Kit #A221 N914XL, XS Tri-Gear, Intercooled 914, Airmaster C/S Prop
> http://www.europaowners.org/forums/gallery2.php?g2_itemId=60232
> http://www.biplaneforumgallery.com/index.php?cat=10046
> Europa Flying!
> 3705 Lynchburg Dr.
> Corinth, TX 76208
> Home: 940-497-2123
> Cel: 817-992-1117
>
> On Feb 10, 2011, at 10:11, ejessee wrote:
>
> >
> > Hello,
> > I have purchased some length of throttle cable from Aircraft Spruce. I
> need to replace the cables between my throttle "rocker arm" and each carb on
> my 912 UL (mounted on CH 701). As the throttle application is "pull only",
> there is a single "grab point" on each of the old cables where the rocker
> catches when pulling the throttle back. This grab point looks like a little
> billet of lead. How can I add such to the new cable? I have looked through
> Aircraft spruce and have found no item that seems to be intended for this.
> What have others done.
> >
> > Thanks for your help.
> >
> > --------
> > Ernest Jessee
> > N4931M
>
>
Message 5
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| Subject: | Re: bowden cable "grab point" on 912 UL. |
As the throttle application is "pull only",
here is a single "grab point" on each of the old cables where the rocker
catches when pulling the throttle back. This grab point looks like a litt
le
billet of lead......
Earnest,
Here is what they look like on my 701 scroll down to the 9th and 10th pic.
http://www.701builder.com/engine19.htm
I'm sure you can use the stop sleeves swaged on that Bob mentions. Maybe
2 on the end for extra security. The cables Zenith provided can be found
in a bike shop.
Brian
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