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Re: [TowerTalk] crankup winch cable ... etc.

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Subject: Re: [TowerTalk] crankup winch cable ... etc.
From: "David Branson KC0LL" <KC0LL@HOTMAIL.COM>
Date: Sun, 11 May 2008 12:06:11 -0700
List-post: <">>
If you want to know about cables, look at aircraft. 
Cables used on aircraft are not normally "oiled", they will pick up and hold 
grit it they are tacky, it wears them out faster than if left dry on the 
"outside". There is little rubbing on the strands inside a cable, but there is 
some. After 40 years my cables in my Cessna are still fine. Only around salt 
water do you have a real problem, and then SS cables are preferred by most. But 
SS cables wear out faster than galvanized cables. ( Galvanizing acts as a 
The problem with "outdoor" cables it water (corrosion), not wear. 

Check the FAA AC 43.13-1B

For everything you ever wanted to know about keeping cables in the air, see: 

Look close to the bottom of page 7-38 

b. Lubrication and corrosion preventive

treatment of carbon steel cables may be effected simultaneously by application 
of compound MIL-C-16173, grade 4, or MIL-C-11796,

Class I. MIL-C-16173 compound should be brushed, sprayed, or wiped on the cable 
to the extent it penetrates into the strands and

adequately covers the cable surfaces. It will dry "tack free" in 24 hours at 77 
°F. MIL-C-11796 compound is applied by dipping the cable for

1/2 minute into a tank of compound heated to 77 ° ± 5 °C (170 ° ± 9 °F) for 1/2 
minute then removing it and wiping off the excess oil. (An

example of cable corrosion, attributable to battery acid, is shown in figure 

David F. Branson

Senior Technician 
Action Communications, Inc. 
Tucson, AZ 
520.792.2709 fax

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  ----- Original Message ----- 
  From: Charles Gallo 
  Cc: ; ; 
  Sent: Sunday, May 11, 2008 9:35 AM
  Subject: Re: [TowerTalk] crankup winch cable ... etc.

  On 5/11/2008 wrote:

  > Hello All,

  > Does stainless steel aircraft cable require a coating???

  > Thanks in advance for any input...

  > 73,
  > Ted  K2QMF
  Don't know about coating, but ANY "wire rope" that moves - aka you are using 
it in your hoist system should be regularly lubricated, and preferably with a 
lube meant for wire rope. (there are a few sold specifically for hams - I have 
a couple of cans from when I used to work in the hoist industry)

  The problem is NOT only rust, the problem is that when the wire is 
bent/moves, each wire in the cable slides over it's neighbors.  If they are not 
lubricated, they wear on each other.  Stainless can be particularly bad, as 
certain grades of stainless are notorious for "galling" when rubbed against 
itself (probably why you don't see stainless on lift cables all that often)

  The 2 main problems in wire rope lubrication is that 1)You have to get the 
lube down into the center of the cable - the worst wear is on the inner strands 
of each bundle and 2)What ever you use should dry "non tacky" - if it remains 
tacky, it WILL pick up dust/dirt, and you have just re-created "lapping 
compound" - it will wear out your cables very quickly

  Most wire rope lubes are a very waxy lubricant (possibly even wax) dissolved 
in a solvent that evaporates fairly quickly.  You apply it to the rope (most 
I've seen are spray on) and usually you are told to wipe down the outside to 
remove any excess lube.  In use, the lube tends to squeeze out between the 
strands to lube the outside

  73 de KG2V

  For the Children - RKBA!

  "To preserve liberty, it is essential that the whole body of people always 
possess arms,
   and be taught alike, especially when young, how to use them..." 
  -- Richard Henry Lee, 1787 


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