removing mylars at every annual?

[Scott Williams]

How are I.A.s dealing with inspecting around mylars, are they removing these spendy items every year. If not, what are the control surface hinge inspection considerations?

this came up recently for me, luckily I had tissu tape on the upper gap, not so spendy, but before I put on mylars id like to be better informd.

Thanks,
Scott

[[email protected]]

The integrity of the hinge can be verified by gently pushing up/down and fore/aft at each hinge post. Lubrication can be done by sticking spray-lube tube under the Mylar at each hinge.
JJ

[[email protected]]

On Tuesday, October 10, 2017 at 9:07:03 AM UTC-4, wrote:
> The integrity of the hinge can be verified by gently pushing up/down and fore/aft at each hinge post. Lubrication can be done by sticking spray-lube tube under the Mylar at each hinge.
> JJ

I do the same except use a small hypodermic needle to put a small drop of oil in the hinge. Less messy than spray lube for most people.
UH

[ND]

On Tuesday, October 10, 2017 at 9:32:27 AM UTC-4, wrote:
> On Tuesday, October 10, 2017 at 9:07:03 AM UTC-4, wrote:
> > The integrity of the hinge can be verified by gently pushing up/down and fore/aft at each hinge post. Lubrication can be done by sticking spray-lube tube under the Mylar at each hinge.
> > JJ
>
> I do the same except use a small hypodermic needle to put a small drop of oil in the hinge. Less messy than spray lube for most people.
> UH

yes, hypodermic needle is the way to go! A&Ps who use spray grease on gliders noeed to....not do that.

[George Haeh]

My AME uses Tri Flow Superior spray lube which happens to be specified for

certain helicopter rotors.

No grease = no dirt.

You can find it at bicycle shops.

[Dan Daly[_2_]]

On Tuesday, October 10, 2017 at 4:00:07 PM UTC-4, George Haeh wrote:
> My AME uses Tri Flow Superior spray lube which happens to be specified for
>
> certain helicopter rotors.
>
> No grease = no dirt.
>
> You can find it at bicycle shops.

LPS1 is commonly used in Colorado. Grit doesn't stick and it works well at high altitudes (white lithium grease tends to freeze up). The SZD-55 ailerons can be removed without removing external mylars at the annual for lube (requires a logbook entry and second signature by pilot confirming PCC done)..

[Darryl Ramm]

On Tuesday, October 10, 2017 at 5:55:22 AM UTC-7, Scott Williams wrote:
> How are I.A.s dealing with inspecting around mylars, are they removing these spendy items every year. If not, what are the control surface hinge inspection considerations?
>
> this came up recently for me, luckily I had tissu tape on the upper gap, not so spendy, but before I put on mylars id like to be better informd.
>
> Thanks,
> Scott

Uh no. ...but that does reminds me of a great story, I'll not mention the location to save embarrassment,... a new line boy is being showed the ropes, how to remove wing tape on a glider at the end of a day. He is asked to finish that off and the supervisor leaves... to come back later and find all the mylars removed as well.

[krasw]

If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.

[Darryl Ramm]

On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge.. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.

Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.

[Tom Kelley #711]

On Tuesday, October 10, 2017 at 3:20:13 PM UTC-6, Darryl Ramm wrote:
> On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
>
> Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.

Hmmmm.........you might want to check your bottoms!

Best. Tom #711

P>S> glad your not Doctor giving me a shot!

[Darryl Ramm]

On Tuesday, October 10, 2017 at 2:44:15 PM UTC-7, Tom Kelley #711 wrote:
> On Tuesday, October 10, 2017 at 3:20:13 PM UTC-6, Darryl Ramm wrote:
> > On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
> >
> > Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.
>
> Hmmmm.........you might want to check your bottoms!
>
> Best. Tom #711
>
> P>S> glad your not Doctor giving me a shot!

Tom when you eventually make it out to CA I can demonstrate how to apply an oil injection. You'll hardly feel it.

[krasw]

On Wednesday, 11 October 2017 00:20:13 UTC+3, Darryl Ramm wrote:
> On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
>
> Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.

Hole in airtight seal, interesting.

[Darryl Ramm]

On Wednesday, October 11, 2017 at 12:23:59 AM UTC-7, krasw wrote:
> On Wednesday, 11 October 2017 00:20:13 UTC+3, Darryl Ramm wrote:
> > On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
> >
> > Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.
>
> Hole in airtight seal, interesting.

Oh no, a few hypodermic needle holes. Maybe the massive bleeding of air though those tiny holes will affect the handling, and the gliders will fall out the sky.... it's amazing whole fleets of gliders maintained in this way have not fallen out of the sky, or had any other apparent problems...

[krasw]

On Wednesday, 11 October 2017 10:49:37 UTC+3, Darryl Ramm wrote:
> On Wednesday, October 11, 2017 at 12:23:59 AM UTC-7, krasw wrote:
> > On Wednesday, 11 October 2017 00:20:13 UTC+3, Darryl Ramm wrote:
> > > On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > > > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
> > >
> > > Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.
> >
> > Hole in airtight seal, interesting.
>
> Oh no, a few hypodermic needle holes. Maybe the massive bleeding of air though those tiny holes will affect the handling, and the gliders will fall out the sky.... it's amazing whole fleets of gliders maintained in this way have not fallen out of the sky, or had any other apparent problems...

Well why seal at all then, the glider flies perfectly well anyway? :)

[[email protected]]

On Wednesday, October 11, 2017 at 6:26:36 AM UTC-4, krasw wrote:
> On Wednesday, 11 October 2017 10:49:37 UTC+3, Darryl Ramm wrote:
> > On Wednesday, October 11, 2017 at 12:23:59 AM UTC-7, krasw wrote:
> > > On Wednesday, 11 October 2017 00:20:13 UTC+3, Darryl Ramm wrote:
> > > > On Tuesday, October 10, 2017 at 2:10:23 PM UTC-7, krasw wrote:
> > > > > If you have proper sealing, teflon tape under mylar, it is not possible to lubricate hinges. Use upper mylar to prevent water or dust entering hinge. Change everything after 3-5 years and lubricate using grease, not anything that comes out of spray can as it is only cosmetics.
> > > >
> > > > Sure you can, if you want to, you stick a large hypodermic needle thought the teflon barrier tape and apply oil from a syringe.
> > >
> > > Hole in airtight seal, interesting.
> >
> > Oh no, a few hypodermic needle holes. Maybe the massive bleeding of air though those tiny holes will affect the handling, and the gliders will fall out the sky.... it's amazing whole fleets of gliders maintained in this way have not fallen out of the sky, or had any other apparent problems...
>
> Well why seal at all then, the glider flies perfectly well anyway? :)

My wing ends up with 2 holes at each hinge, made with a sharp 20 gauge needle.
These holes mostly close back up anyway. Given that they are on the high pressure side of the wing, underneath a close fitting wiper seal, I doubt that a meaningful affect on performance results.
This is a well proven technique.
UH

[[email protected]]

It's pretty early for the annual winter discussion/argument about spray lubricants, but what the hell.........
After retiring from the AF, I took the GI bill and antended Sacramento City College who offered a 2 year program in aeronautics leading to an AA degree and an A&P license. Their aero club flew a fleet of light aircraft and the students maintained them. What lubricant was taught and used? Good old WD-40! The thinking was that a brief shot would loosen old grease and any over spray would soon evaporate. I have several long tube setups to allow a brief shot of lube into hard to get to areas like all points on the landing gear and deep inside the fuselage or way inside the wing. How do you "oil only" guys lube these areas?
Flame suit on,
JJ

[[email protected]]

On Wednesday, October 11, 2017 at 9:59:14 AM UTC-4, wrote:
> It's pretty early for the annual winter discussion/argument about spray lubricants, but what the hell.........
> After retiring from the AF, I took the GI bill and antended Sacramento City College who offered a 2 year program in aeronautics leading to an AA degree and an A&P license. Their aero club flew a fleet of light aircraft and the students maintained them. What lubricant was taught and used? Good old WD-40! The thinking was that a brief shot would loosen old grease and any over spray would soon evaporate. I have several long tube setups to allow a brief shot of lube into hard to get to areas like all points on the landing gear and deep inside the fuselage or way inside the wing. How do you "oil only" guys lube these areas?
> Flame suit on,
> JJ

I use syringes with several different needles, the longest is a spinal needle about 6 inches long. Lets me get pretty much wherever I need to get. Needles also allow working oil inside felt seals. To loosen stuff up I like a 50-50 mix of light oil(20 weight) and Marvel Mystery Oil. Does a pretty good job of softening up old goo. Also use WD-40 as a clean up fluid, but not as a lubricant. WD-40 leaves a film coating which is what it was originally created for. WD= Water Displacement. Really good for corrosion prevention in metal ships.
Mostly my message is don't spray **** all over.
FWIW
UH

[Jonathan St. Cloud]

WD 40 is the 40th formula tried for Water Displacement (i.e., anti-rust), It is kerosene and perfume, not a lubricant. Tri-flow is a is a great lubricant for aileron hinges, or lead-lag hinges on helicopters.


On Wednesday, October 11, 2017 at 6:59:14 AM UTC-7, wrote:
> It's pretty early for the annual winter discussion/argument about spray lubricants, but what the hell.........
> After retiring from the AF, I took the GI bill and antended Sacramento City College who offered a 2 year program in aeronautics leading to an AA degree and an A&P license. Their aero club flew a fleet of light aircraft and the students maintained them. What lubricant was taught and used? Good old WD-40! The thinking was that a brief shot would loosen old grease and any over spray would soon evaporate. I have several long tube setups to allow a brief shot of lube into hard to get to areas like all points on the landing gear and deep inside the fuselage or way inside the wing. How do you "oil only" guys lube these areas?
> Flame suit on,
> JJ