Lubricant for spar pins

At 14:13 08 January 2018, Papa3 wrote:
On Monday, January 8, 2018 at 7:30:07 AM UTC-5, Jim White wrote:
At 23:35 07 January 2018, john firth wrote:
Wot? nobody pushing good old WD 40?
Seriously, surely the meticulous glider pilot must treat load bearing
pins
=3D
Tell me why? I am presently using WD40 specialist spray grease. Very
slip=
py
and easy to apply.
=20
Jim

I think most folks view WD40 as the "traditional" water displacement
produc=
t in the blue can which is nothing like the WD40 Spray Grease you're
using.=
If anyone really wants to do the work, you can look at some of the key
t=
ests that should be published on the Technical Data Sheets for whatever
pro=
duct you use to see how it performs. Things like ASTM D2266 2596 etc.
def=
ine critical wear prevention properties. =20

P3


Datasheet says:

4-ball Wear Test 0.5 mm (ASTM D-4172) ,
Dropping Point Temperature 118°C (ASTM D566) ,
Corrosion Protection in salt spray test 0 % rust at 72h (ASTM B-117) ,
Temperature (Continuous) -20°C to +115°C as grease, then to +260°C as
liquid

Is that any good?

Jim

White lithium grease works fine on my Stemme year round, including wave
flying.Â* When the outboard panels are installed, there are no shear
loads on the pins and they slide smoothly in and out.Â* When they start
to feel sticky, I wipe them off with a paper towel and apply a fresh,
light coating of grease and smooth, easy installation is restored.Â*
There's really no need to use grease from Mars or Uranus...

On 1/7/2018 4:54 PM, wrote:
I have used 100% synthetic Mobil 1 grease for three gliders that I fly in the heat of summer and the very very cold winters. Does not get stiff in the winter or runny in the summer.

--
Dan, 5J

On Monday, January 8, 2018 at 4:42:18 AM UTC-8, wrote:
Hi Eric
I see the Aeroshell 5% molybdenum disulphide grease is now sold as Aeroshell 64. It's widely used in aircraft. I wasn't aware of the Schleicher caution against it, and haven't seen any caution from SH. I wonder where Schleicher got their information. I don't see any problems reported when using it with brass in an internet search. There is a copper-corrosion test in the 21164 mil standard for greases (5% moly grease passes) but the real-world meaning of that test isn't clear to me.
regards



My ASH 26 E manual warns against using molybdenum disulphide grease (Aeroshell 33
contains 5% of it) on the main pins because it can damage the brass bushings in
the wing. So, be sure to check it's compatibility if your bushings are brass.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf

Dry moly can cause corrosion, as it absorbs moisture from the air and the disulphide turns into sulfuric acid. Any good grease is a concoction of ingredients, some of which are inhibitors to make sure that doesn't happen. I believe the concern is theoretical, more than real.

On Mon, 08 Jan 2018 16:23:43 +0000, Jim White wrote:

At 14:13 08 January 2018, Papa3 wrote:
On Monday, January 8, 2018 at 7:30:07 AM UTC-5, Jim White wrote:
At 23:35 07 January 2018, john firth wrote:
Wot? nobody pushing good old WD 40?
Seriously, surely the meticulous glider pilot must treat load bearing
pins
=3D
Tell me why? I am presently using WD40 specialist spray grease. Very
slip=
py
and easy to apply.
=20
Jim

I think most folks view WD40 as the "traditional" water displacement
produc=
t in the blue can which is nothing like the WD40 Spray Grease you're
using.=
If anyone really wants to do the work, you can look at some of the
key
t=
ests that should be published on the Technical Data Sheets for whatever
pro=
duct you use to see how it performs. Things like ASTM D2266 2596 etc.
def=
ine critical wear prevention properties. =20

P3


Datasheet says:

4-ball Wear Test 0.5 mm (ASTM D-4172) ,
Dropping Point Temperature 118°C (ASTM D566) ,
Corrosion Protection in salt spray test 0 % rust at 72h (ASTM B-117) ,
Temperature (Continuous) -20°C to +115°C as grease, then to +260°C as
liquid

Is that any good?

I notice that the "Super Lube grease with Syncolon" is available in the
UK in 90mm tubes from Amazon, so have decided that I'll have one before
my Libelle's next annual is due in March: I need to bbuy some grease
before then anyway.


--
Martin | martin at
Gregorie | gregorie
| dot org

Come on, the most important quality for main pin grease it that it leave a permanent circular stain on the thighs of your favorite flying pants/shorts - how else will other glider-guiders recognize you as one of the true believers at the field?

Even Pez D. Spencer knew that!

66

On Monday, January 8, 2018 at 6:42:18 AM UTC-6, wrote:
Hi Eric
I see the Aeroshell 5% molybdenum disulphide grease is now sold as Aeroshell 64. It's widely used in aircraft. I wasn't aware of the Schleicher caution against it, and haven't seen any caution from SH. I wonder where Schleicher got their information. I don't see any problems reported when using it with brass in an internet search. There is a copper-corrosion test in the 21164 mil standard for greases (5% moly grease passes) but the real-world meaning of that test isn't clear to me.
regards



My ASH 26 E manual warns against using molybdenum disulphide grease (Aeroshell 33
contains 5% of it) on the main pins because it can damage the brass bushings in
the wing. So, be sure to check it's compatibility if your bushings are brass.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1
- "Transponders in Sailplanes - Dec 2014a" also ADS-B, PCAS, Flarm

http://soaringsafety.org/prevention/...anes-2014A.pdf

I have seen molybdenum disulphide grease cause galling in brass parts on some pneumatic equipment. Moly is pretty much an "anti-lubricant" for brass.

We wax our pins twice a season, usually once before winter storage and again in the spring, mostly for corrosion protection. During the flying season we use whatever slippery comes to hand, usually the same grease as we don't use on O2 system parts.


--Bob K.

On Monday, January 8, 2018 at 2:33:59 PM UTC-5, Bob Kuykendall wrote:
We wax our pins twice a season, usually once before winter storage and again in the spring, mostly for corrosion protection. During the flying season we use whatever slippery comes to hand, usually the same grease as we don't use on O2 system parts.


--Bob K.

I've used plain old Vaseline petroleum jelly for 40 years or so with no known bad effects.
UH

On Mon, 08 Jan 2018 09:41:57 -0800, kirk.stant wrote:

Come on, the most important quality for main pin grease it that it leave
a permanent circular stain on the thighs of your favorite flying
pants/shorts - how else will other glider-guiders recognize you as one
of the true believers at the field?

.... the bucket hat?


--
Martin | martin at
Gregorie | gregorie
| dot org

On Monday, January 8, 2018 at 3:38:45 PM UTC-5, Kiwi User wrote:
On Mon, 08 Jan 2018 09:41:57 -0800, kirk.stant wrote:


... the bucket hat?



Which my wife fondly refers to as Birth Control. "There's no way you're getting laid wearing that thing".