Today's Message Index:
----------------------
1. 12:47 AM - Re: Re: Sticky valve? (Jan Mevis)
2. 12:31 PM - Oktoberfest reminder at Lakeland (Cpayne)
3. 01:47 PM - Re: Oktoberfest reminder at Lakeland (Richard Hess)
4. 06:50 PM - Re: Re: Sticky valve? (Roger Kemp)
Message 1
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| Subject: | Re: Sticky valve? |
I'd be very cautious too.
I follow the Russian advise: a small quantity of a 50/50 mixture op pure
ethanol (96 degrees) and high-quality glycerine.
My Lithuanian mechanic injects a small quantity (only a few cubic
centimeters) of this stuff straight into the actuators annually.
Of course it'll depend upon the material that you use for the seals at
overhaul. I have the gear legs and actuators overhauled in Lithuania at
Termikas.
And therefore I trust their advise.
Otherwise I'd do exactly the same as Mark: no stuff at all, if you don't
know what is inside.
At the beginning I was suspicious about the use of ethanol since it
attacks natural rubbers.
But the Russian inspector explained the reasoning behind: the ethanol
binds the moisture and the glycerine keeps the seals in shape.
Jan
On 28/08/15 22:51, "Bitterlich, Mark G CIV NAVAIR, WD"
<owner-yak-list-server@matronics.com on behalf of
mark.bitterlich@navy.mil> wrote:
><mark.bitterlich@navy.mil>
>
>I was talked into putting pneumatic tool oil into my pneumatic system
>back around 2001 or so, on the original version of the YAK LIST.
>
>I had just purchased my YAK-50 and had no idea how old the landing gear
>actuator seals were, but they were working fine at the time. I injected
>the oil and several flights later, the seals in the landing gear
>actuators started coming apart. What I noticed was air leaking out the
>gear handle when the gear was down and locked. Luckily I figured out
>that if the actuator had internal leakage, you would hear that at the
>gear handle. When I took the actuators apart, the chevron seals were
>pretty much like soft putty.
>
>Granted, these were probably original Russian seals. Granted, they were
>probably hardened and in very poor shape. However, the oil caused them
>to just fall apart.
>
>To each his or her own, but after that little experience I have never
>injected a DARN thing into my air system. NADA ZERO ZIPPO. I did
>rebuild the actuators, and honestly it is about time to do them again and
>personally... I believe that rebuilding the actuators, and taking apart
>and looking at pneumatic components every so often is a very good idea,
>especially the areas where there is known corrosion issues and doing that
>is much more important than injecting ANYTHING into that system.
>
>As I said, I own a YAK-50, so my experience may not be applicable to 52's
>or CJ's. However, I'd be very cautious of what I inject into the air
>system and would not ad hoc it under any circumstance, or make guesses.
>Also of note is that my brake system is no longer pneumatic, it is now
>toe brakes and hydraulic. So my pneumatic system is just for landing
>gear and starting.
>
>There is long term impact with this decision, so caution is the order of
>the day (so to speak).
>
>Best of luck,
>
>Mark
>
>
>-----Original Message-----
>From: owner-yak-list-server@matronics.com
>[mailto:owner-yak-list-server@matronics.com] On Behalf Of JL2A
>Sent: Friday, August 28, 2015 7:02 AM
>To: yak-list@matronics.com
>Subject: Yak-List: Re: Sticky valve?
>
>
>Mmm ok, so Aeroshell 100 then? In the manual it specifies castor oil OR
>type 8 aviation oil, what ever that is (or type x I can't remember) Do we
>think that it is probably a mineral oil? Has anyone got a way to find out?
>
>I am done with castor oil! The book calls for a colossal amount
>(something like 30mL into each end if I recall correctly?) and around the
>front rudder pedals and all that area is a sticky mess. There's a very
>well preserved CJ under it all which is a plus I guess.
>
>I think I read here that others were using machine oil and it was fine -
>the thought did cross my mind about seal compatibility but one of those
>wanting to believe situations I guess.
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=446468#446468
>
>
Message 2
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| Subject: | Oktoberfest reminder at Lakeland |
If you are coming to Lakeland, FL for the Oktoberfest Clinic, please let me know.
Registering on the RPA site is also a good way of letting me know, as well
as eMail. Getting a good rate at the Hilton Garden Inn may not be doable but I'm
still trying. So far travel websites such a Priceline have yielded better results
than I have obtained.
Basic Ground School is Thursday Oct. 1st in the afternoon. Let me know if you want
a seat. Mission Commander seminar is Friday afternoon, likewise, let me or
Pappy know if you need to reserve a seat (limited space in a small conference
room).
We plan on having fun and parading in KLAL closed airspace during two sessions
as part of the weekend activities. Friday night social hour and Saturday night
banquet as well.
Craig Payne
Message 3
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| Subject: | Re: Oktoberfest reminder at Lakeland |
I'm still good
Richard Hess
C 404-964-4885
> On Aug 29, 2015, at 3:28 PM, Cpayne <cpayne@joimail.com> wrote:
>
>
> If you are coming to Lakeland, FL for the Oktoberfest Clinic, please let me know.
Registering on the RPA site is also a good way of letting me know, as well
as eMail. Getting a good rate at the Hilton Garden Inn may not be doable but
I'm still trying. So far travel websites such a Priceline have yielded better
results than I have obtained.
>
> Basic Ground School is Thursday Oct. 1st in the afternoon. Let me know if you
want a seat. Mission Commander seminar is Friday afternoon, likewise, let me
or Pappy know if you need to reserve a seat (limited space in a small conference
room).
>
> We plan on having fun and parading in KLAL closed airspace during two sessions
as part of the weekend activities. Friday night social hour and Saturday night
banquet as well.
>
> Craig Payne
>
>
>
>
Message 4
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| Subject: | Re: Sticky valve? |
Your YAK 50 experience is applicable.
Doc
> On Aug 28, 2015, at 3:51 PM, Bitterlich, Mark G CIV NAVAIR, WD <mark.bitterlich@navy.mil>
wrote:
>
>
> I was talked into putting pneumatic tool oil into my pneumatic system back around
2001 or so, on the original version of the YAK LIST.
>
> I had just purchased my YAK-50 and had no idea how old the landing gear actuator
seals were, but they were working fine at the time. I injected the oil and
several flights later, the seals in the landing gear actuators started coming
apart. What I noticed was air leaking out the gear handle when the gear was
down and locked. Luckily I figured out that if the actuator had internal leakage,
you would hear that at the gear handle. When I took the actuators apart,
the chevron seals were pretty much like soft putty.
>
> Granted, these were probably original Russian seals. Granted, they were probably
hardened and in very poor shape. However, the oil caused them to just fall
apart.
>
> To each his or her own, but after that little experience I have never injected
a DARN thing into my air system. NADA ZERO ZIPPO. I did rebuild the actuators,
and honestly it is about time to do them again and personally... I believe
that rebuilding the actuators, and taking apart and looking at pneumatic components
every so often is a very good idea, especially the areas where there
is known corrosion issues and doing that is much more important than injecting
ANYTHING into that system.
>
> As I said, I own a YAK-50, so my experience may not be applicable to 52's or
CJ's. However, I'd be very cautious of what I inject into the air system and
would not ad hoc it under any circumstance, or make guesses. Also of note is
that my brake system is no longer pneumatic, it is now toe brakes and hydraulic.
So my pneumatic system is just for landing gear and starting.
>
> There is long term impact with this decision, so caution is the order of the
day (so to speak).
>
> Best of luck,
>
> Mark
>
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com [mailto:owner-yak-list-server@matronics.com] On Behalf Of JL2A
> Sent: Friday, August 28, 2015 7:02 AM
> To: yak-list@matronics.com
> Subject: Yak-List: Re: Sticky valve?
>
>
> Mmm ok, so Aeroshell 100 then? In the manual it specifies castor oil OR type
8 aviation oil, what ever that is (or type x I can't remember) Do we think that
it is probably a mineral oil? Has anyone got a way to find out?
>
> I am done with castor oil! The book calls for a colossal amount (something like
30mL into each end if I recall correctly?) and around the front rudder pedals
and all that area is a sticky mess. There's a very well preserved CJ under
it all which is a plus I guess.
>
> I think I read here that others were using machine oil and it was fine - the
thought did cross my mind about seal compatibility but one of those wanting to
believe situations I guess.
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=446468#446468
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
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