---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Wed 05/05/10: 6 ---------------------------------------------------------- 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 _____________________________________ Time: 03:58:58 AM PST US From: Cpayne Subject: Yak-List: 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 _____________________________________ Time: 06:45:39 AM PST US Subject: Yak-List: Re: Polished props and stuff From: "Dale" 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 _____________________________________ Time: 07:58:34 AM PST US Subject: Yak-List: Re: Polished Props From: "racemech11" 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 _____________________________________ Time: 10:55:20 AM PST US Subject: RE: Yak-List: Re: Baklan 5 radio problem From: "Bitterlich, Mark G CIV Det Cherry Point, MALS-14 64E" 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" 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 _____________________________________ Time: 10:23:17 PM PST US From: "William Halverson" Subject: Re: Yak-List: 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 _____________________________________ Time: 11:10:23 PM PST US From: "Jan Mevis" Subject: RE: Yak-List: 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" 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" 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 > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.