Maintenance

I am new to glider ownership an am about to disassemble the interior
to get to all the cables etc. for inspection and lubrication. Any
advice on what is the best lubricant to use for cables etc.?

Yes. You don't lubricate cables in the first place.

Bert

"Steve Freeman" wrote in message
...
I am new to glider ownership an am about to disassemble the interior
to get to all the cables etc. for inspection and lubrication. Any
advice on what is the best lubricant to use for cables etc.?

On Nov 27, 1:25 am, "Bert Willing" bw_no_spam_ple...@tango-
whisky.com wrote:
Yes. You don't lubricate cables in the first place.


Interesting!. Why not? I use LPS2 to lubricate the rudder cable runs
on my ASW-28 and did the same on my ASW-19b.

Andy

On 11/27/07 1:25 AM, in article , "Bert
Willing" wrote:

Yes. You don't lubricate cables in the first place.

Bert

"Steve Freeman" wrote in message
...
I am new to glider ownership an am about to disassemble the interior
to get to all the cables etc. for inspection and lubrication. Any
advice on what is the best lubricant to use for cables etc.?



Bert,

Why is that?

My only other experience with metal woven cables running through conduit (as
the rudder control cables do on my glider) is on bicycles (brake, shifter).
If those cables aren't lubricated, the cables get very funky, indeed, and
will fail much sooner than unlubricated ones.

Bullwinkle

Why would you do that ?
In places where the cable runs along a pulley, there is no friction.
In places where the cable runs in teflon hoses, lubrication will attract
dust, and make the cable more abrasive.

Same goes with the roller guides of control tubes. If you lubricate them,
they'll attract dust and you will end up with intends in the tube.

"Andy" wrote in message
...
On Nov 27, 1:25 am, "Bert Willing" bw_no_spam_ple...@tango-
whisky.com wrote:
Yes. You don't lubricate cables in the first place.


Interesting!. Why not? I use LPS2 to lubricate the rudder cable runs
on my ASW-28 and did the same on my ASW-19b.

Andy

Bert,

I beg to disagree. When wire rope or cables flex over a pulley or sheave,
the strands rub against one another. Some larger cables are lubricated as
part of the manufacturing process. I think the smaller aircraft cable we're
talking about is not.

Lubricating the cables, where they flex or rub, will greatly enhance their
service life. A good penetrating lubricant, one with a carrier that
evaporates, is best (Tri-Flow or Super Lube spray come to mind).

bumper
zz
Minden

"Bert Willing" wrote in message
...
Yes. You don't lubricate cables in the first place.

Bert

"Steve Freeman" wrote in message
...
I am new to glider ownership an am about to disassemble the interior
to get to all the cables etc. for inspection and lubrication. Any
advice on what is the best lubricant to use for cables etc.?

Andy wrote:
On Nov 27, 1:25 am, "Bert Willing" bw_no_spam_ple...@tango-
whisky.com wrote:
Yes. You don't lubricate cables in the first place.


Interesting!. Why not? I use LPS2 to lubricate the rudder cable runs
on my ASW-28 and did the same on my ASW-19b.

I never lubricated the rudder cables on my ASW 20 (I flew it for 11
years), and I've never lubricated the cables on my ASH 26 E (13 years so
far). The maintenance manuals on these gliders did not call for
lubrication of the cables, nor did the friction increase while I owned
the gliders, and there was never any corrosion. So, without a problem to
cure, I never tried to fix one.

Did you have a problem that required a cure?

--
Eric Greenwell - Washington State, USA
* Change "netto" to "net" to email me directly
* "Transponders in Sailplanes" http://tinyurl.com/y739x4
* "A Guide to Self-launching Sailplane Operation" at www.motorglider.org

On Nov 27, 12:25 am, "Bert Willing" bw_no_spam_ple...@tango-
whisky.com wrote:
Yes. You don't lubricate cables in the first place.

If you're like me, you remember reading that advice in an old copy of
AC43.13, complete with references to long-obsolete lubricants like
"Par-L-Ketone." From memory, 43.13 said to not oil cables because
lubricants thin enough to get to the cable core will just displace the
factory lubricant and make them more, not less, susceptible to
internal friction and internal corrosion.

However, in the 1998 edition of AC43.13, Chapter 7 seems to have been
revamped, and makes several reasonable recommendations about
inspecting and lubing cables and what to lube them with (MIL-C-16173,
grade 4, or MIL-C-11796, Class I, if you can find them). It also
describes nylon-jacketed cables, which I believe is a newish
development.

My own recommendation would be to avoid thinned oils like tri-flow for
unsheathed cables. As much as I like Tri-Flow as a general lubricant,
it tends to leave a sticky surface, and its solvents might tend to
wash away more of the internal lubricant than it applies. Those waxy
dry lubricants now available for bicycles might be a good bet, since
they tend to leave a dry, tack-free surface that does not attract
abrasive particles. I use that stuff on the cables and pivots of my
climbing gear, and it seems to work a treat.

Thanks, Bob K.

"Doug Hoffman" wrote in message
...
The following relates the actual experience an HP-14 owner had
with lubricants and dirt. Source is Wayne Paul's HP web site. It
supports Bob Kuykendall's assertion that careful selection of
lubricant is important, if one chooses to lubricate at all.

"I have had to replace all of the cables, the previous owner had
greased them at the fairleads, and they picked up dirt and got
badly worn very fast. I also replaced the aileron pushrods, as
they also had been greased at the guides, and ended up with wear
marks. "

--

At the time of cable/push-rod replacement, the HP-14 was 27 years old;
however, only had 167 hours of flight time. I thought I had purchased an
inexpensive sailplane, but in fact I had purchased a cheap sailplane.
(http://www.soaridaho.com/Schreder/HP-14/N990/N990.html)

Wayne
HP-14 "6F"
http://www.soaridaho.com/Schreder/

The following relates the actual experience an HP-14 owner had
with lubricants and dirt. Source is Wayne Paul's HP web site. It
supports Bob Kuykendall's assertion that careful selection of
lubricant is important, if one chooses to lubricate at all.

"I have had to replace all of the cables, the previous owner had
greased them at the fairleads, and they picked up dirt and got
badly worn very fast. I also replaced the aileron pushrods, as
they also had been greased at the guides, and ended up with wear
marks. "

--
Regards,
Doug


--
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