Today's Message Index:
----------------------
1. 03:58 AM - Polished props and stuff (Cpayne)
2. 06:45 AM - Re: Polished props and stuff (Dale)
3. 07:58 AM - Re: Polished Props (racemech11)
4. 10:55 AM - Re: Re: Baklan 5 radio problem (Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E)
5. 10:23 PM - Re: Re: Baklan 5 radio problem (William Halverson)
6. 11:10 PM - Re: Re: Baklan 5 radio problem (Jan Mevis)
Message 1
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| Subject: | Polished props and stuff |
Of course polished aluminum, spinners and airplanes look great! So, if polished
props are "banned", what about all those polished fuselages? Often you can see
filliform corrosion under the shine.
Technology provides alternatives. "Ghost" chrome is now applied in production on
numerous autos, not just the hot rods and custom bikes. One of the shops on
my airport (LAL) has a rig for application of a rainbow of metal-look finishes.
Has anyone out there flown with any such finish on their spinner?
Craig Payne
Message 2
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| Subject: | Re: Polished props and stuff |
US aircraft skins unlike Russian Skins are alclad aluminum . Just like anodizing
a propeller for protection the US skins have a sandwich of pure aluminum on
the surface for protection, polish through it over the years and corrosion starts.
Beech has several service bullitens on the V-35 for just this problem.
The skins must be thickness measured to assure proper structural integrity because
of over polishing. The Yaks and such are all and must use anodized/alodined
or painted to protect them from corrosion because they do not use alclad.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=296821#296821
Message 3
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| Subject: | Re: Polished Props |
For certified aircraft, surface treatment of a component goes back to the overhaul
manual for that component.
For a prop, the manufacture usually has a procedure for what and how the surface
is prepped and completed. If the manual, in the overhaul instructions do not
list polishing as a certified surface treatment, than it is not approved and
would be unserviceable.
I have several customers that have polished props and when the prop goes to the
shop, they will only do an IRAN (inspect and repair as necessary) not an overhaul.
For them to legally put that overhaul sign off on it, they have to prep
the blades in accordance with the overhaul manual, which includes painting. I
know that MT prop's, which are a certified prop has a component manual, and I
know they are composite and can't be polished, but they call out a certain brand
of paint and the paint code for it, so to overhaul it you have to use that
name brand paint and that paint code.
Now to experimental aircraft. If your operation limitations state that you will
maintain the aircraft IAW part 43, this is going to drive you back to a component
maintenance manual and any procedure listed. So if, in this case a prop,
has as approved component maintenance manual and it calls out a surface prep procedure
and does not list polishing, it is essentially unairworthy.
Most IA's will annual an aircraft with a polished prop and not see it as a problem,
but in reality it is not airworthy.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=296833#296833
Message 4
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| Subject: | Re: Baklan 5 radio problem |
Great info.
Bottom line... Anything that creates a spark creates RF noise as well,
especially when dealing with high voltage sources. The very first
radios were made using what was called "Spark Gaps", and they still
work!
This problem would have been found by turning the mags off one at a time
then both at once for a short duration in flight.
For what it is worth, there are many ways to go about finding problems
in/with Avionics. The method I personally use is based on a sequential
approach to determine the cause then use a technical method to attempt a
correction.
Oftentimes in my line of work a person will have a problem that someone
else has personally experienced in the past and will jump right on that
and it will fix the current problem. In record time I might add! In
the meantime, there I sit with my head stuck in a book of schematics.
In the Fleet, this is what we refer to as "Shot-gunning" a problem and
it OFTEN works. My methods are really only required when shot-gunning
fails.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: Tuesday, May 04, 2010 16:26
Subject: Re: Yak-List: Re: Baklan 5 radio problem
I've had the same issue with my radios for the past year. After reading
Dale's post last week I pulled the cap off of both mags last weekend.
The spring tension was good, but the spring had rust/corrosion on it. I
removed and cleaned the spring and all contacts inside the cap, put it
back together and the radio is now the clearest and loudest it's ever
been. Easy to do first before going deeper.
Mark Davis
N44YK
----- Original Message -----
From: "Dale" <hdinamic@qwest.net>
Sent: Sunday, May 02, 2010 9:20 AM
Subject: Yak-List: Re: Baklan 5 radio problem
>
> Make sure the spring that contacts the cigarette in the magneto rotor
cap
> is making good contact and not corroded. If your magneto cap drops on
> without needing to be pushed down to compress the spring it can cause
the
> clicking sound in your radio as it is not making good contact.
Stretch
> spring and clean any corrosion. This information can also be found on
the
> Skyranch tips web site as a possible cause for radio interference from
> mags.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=296471#296471
>
>
>
Message 5
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| Subject: | Re: Baklan 5 radio problem |
Both off in flight?
I did that once by accident and scared the Hell out of myself ...
What's the restart procedure? In my case when I turned them both back on I thought
the engine was going to jump of the front end of my a/c!
+-----Original Message-----
+From: Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E [mailto:mark.bitterlich@navy.mil]
+Sent: Wednesday, May 5, 2010 10:53 AM
+To: yak-list@matronics.com
+Subject: RE: Yak-List: Re: Baklan 5 radio problem
+
+
+Great info.
+
+Bottom line... Anything that creates a spark creates RF noise as well,
+especially when dealing with high voltage sources. The very first
+radios were made using what was called "Spark Gaps", and they still
+work!
+
+This problem would have been found by turning the mags off one at a time
+then both at once for a short duration in flight.
+
Message 6
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| Subject: | Re: Baklan 5 radio problem |
Shot-gunning a problem fails very often, Mark. I have the same experience in
my technical job as you do. The analytical approach, narrowing the problem
down, always works.
The schedule you described can help a less-technical guy to pinpoint where
the problem is situated, and then an "expert" can solve it.
Jan Mevis
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Bitterlich, Mark G
CIV Det Cherry Point, MALS-14 64E
Sent: woensdag 5 mei 2010 7:54
Subject: RE: Yak-List: Re: Baklan 5 radio problem
MALS-14 64E" <mark.bitterlich@navy.mil>
Great info.
Bottom line... Anything that creates a spark creates RF noise as well,
especially when dealing with high voltage sources. The very first
radios were made using what was called "Spark Gaps", and they still
work!
This problem would have been found by turning the mags off one at a time
then both at once for a short duration in flight.
For what it is worth, there are many ways to go about finding problems
in/with Avionics. The method I personally use is based on a sequential
approach to determine the cause then use a technical method to attempt a
correction.
Oftentimes in my line of work a person will have a problem that someone
else has personally experienced in the past and will jump right on that
and it will fix the current problem. In record time I might add! In
the meantime, there I sit with my head stuck in a book of schematics.
In the Fleet, this is what we refer to as "Shot-gunning" a problem and
it OFTEN works. My methods are really only required when shot-gunning
fails.
Mark Bitterlich
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mark Davis
Sent: Tuesday, May 04, 2010 16:26
Subject: Re: Yak-List: Re: Baklan 5 radio problem
I've had the same issue with my radios for the past year. After reading
Dale's post last week I pulled the cap off of both mags last weekend.
The spring tension was good, but the spring had rust/corrosion on it. I
removed and cleaned the spring and all contacts inside the cap, put it
back together and the radio is now the clearest and loudest it's ever
been. Easy to do first before going deeper.
Mark Davis
N44YK
----- Original Message -----
From: "Dale" <hdinamic@qwest.net>
Sent: Sunday, May 02, 2010 9:20 AM
Subject: Yak-List: Re: Baklan 5 radio problem
>
> Make sure the spring that contacts the cigarette in the magneto rotor
cap
> is making good contact and not corroded. If your magneto cap drops on
> without needing to be pushed down to compress the spring it can cause
the
> clicking sound in your radio as it is not making good contact.
Stretch
> spring and clean any corrosion. This information can also be found on
the
> Skyranch tips web site as a possible cause for radio interference from
> mags.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=296471#296471
>
>
>
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