---------------------------------------------------------- Kolb-List Digest Archive --- Total Messages Posted Mon 06/03/19: 6 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:48 AM - Re: Kolb Ultrstar Wing Condition (ratcobob) 2. 07:41 AM - Re: Kolb Ultrstar Wing Condition (Rex Rodebush) 3. 08:19 AM - Re: Re: Kolb Ultrstar Wing Condition (Rick Neilsen) 4. 08:33 AM - Re: Re: Kolb Ultrstar Wing Condition (james.vanlaak@gmail.com) 5. 10:20 AM - Re: Re: Kolb Ultrstar Wing Condition (Pfatchantz) 6. 10:24 AM - Re: Re: Kolb Ultrstar Wing Condition (Pfatchantz) ________________________________ Message 1 _____________________________________ Time: 06:48:38 AM PST US Subject: Kolb-List: Re: Kolb Ultrstar Wing Condition From: "ratcobob" Here's the Cuyuna engine guy http://zdenterprises.net/ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=489454#489454 ________________________________ Message 2 _____________________________________ Time: 07:41:23 AM PST US Subject: Kolb-List: Re: Kolb Ultrstar Wing Condition From: "Rex Rodebush" Impossible question to answer just based on pictures. I would remove the aluminum surface oxidation in several spots to determine the depth. I would suspect that the aluminum is probably OK. You might also drill out a number of rivets in random locations to see if the corrosion is through the rivet or just on the surface of the head and how deep. I would probably consider drilling them all out and replacing with stainless steel rivets. A lot of work but not a lot of money. Again, these are idle thoughts and not recommendations. Worth what you paid for them. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=489456#489456 ________________________________ Message 3 _____________________________________ Time: 08:19:51 AM PST US From: Rick Neilsen Subject: Re: Kolb-List: Re: Kolb Ultrstar Wing Condition I have heard that aluminum oxidizes and the oxidation forms a protective barrier that stops further oxidation? If this is so leave it alone. I was surprised to see the rust on the rivets. I think mine are stainless steel. Absolutely drill out a few rivets to see how bad they are. Wow that would be a major job drilling out and replacing thousands of rivets. Then you would have to disassemble the structure to get the remainder of the old rivets out. I have remainder of a few rivets that didn't seat properly still in my plane but you would have thousands of them. Also that engine didn't have that great a reputation, can you still get parts? Good luck. Rick Neilsen Redrive VW powered MKIIIC On Mon, Jun 3, 2019 at 10:43 AM Rex Rodebush wrote: > > Impossible question to answer just based on pictures. I would remove the > aluminum surface oxidation in several spots to determine the depth. I > would suspect that the aluminum is probably OK. You might also drill out a > number of rivets in random locations to see if the corrosion is through the > rivet or just on the surface of the head and how deep. I would probably > consider drilling them all out and replacing with stainless steel rivets. > A lot of work but not a lot of money. > > Again, these are idle thoughts and not recommendations. Worth what you > paid for them. > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=489456#489456 > > ________________________________ Message 4 _____________________________________ Time: 08:33:05 AM PST US From: james.vanlaak@gmail.com Subject: Re: Kolb-List: Re: Kolb Ultrstar Wing Condition Different kinds of aluminum have different corrosion properties. Pure aluminum forms an oxide layer that protects that below it. This is called alclad aluminum. I do not believe the aluminum tubing in Kolbs is alclad. On Mon, Jun 3, 2019 at 11:21 AM Rick Neilsen wrote: > I have heard that aluminum oxidizes and the oxidation forms a protective > barrier that stops further oxidation? If this is so leave it alone. I was > surprised to see the rust on the rivets. I think mine are stainless steel. > Absolutely drill out a few rivets to see how bad they are. Wow that would > be a major job drilling out and replacing thousands of rivets. Then you > would have to disassemble the structure to get the remainder of the old > rivets out. I have remainder of a few rivets that didn't seat properly > still in my plane but you would have thousands of them. > > Also that engine didn't have that great a reputation, can you still get > parts? > > Good luck. > > Rick Neilsen > Redrive VW powered MKIIIC > > On Mon, Jun 3, 2019 at 10:43 AM Rex Rodebush wrote: > >> >> Impossible question to answer just based on pictures. I would remove the >> aluminum surface oxidation in several spots to determine the depth. I >> would suspect that the aluminum is probably OK. You might also drill out a >> number of rivets in random locations to see if the corrosion is through the >> rivet or just on the surface of the head and how deep. I would probably >> consider drilling them all out and replacing with stainless steel rivets. >> A lot of work but not a lot of money. >> >> Again, these are idle thoughts and not recommendations. Worth what you >> paid for them. >> >> >> >> >> Read this topic online here: >> >> http://forums.matronics.com/viewtopic.php?p=489456#489456 >> >> >> >> >> >> >> ========== >> -List" rel="noreferrer" target="_blank"> >> http://www.matronics.com/Navigator?Kolb-List >> ========== >> FORUMS - >> eferrer" target="_blank">http://forums.matronics.com >> ========== >> WIKI - >> errer" target="_blank">http://wiki.matronics.com >> ========== >> b Site - >> -Matt Dralle, List Admin. >> rel="noreferrer" target="_blank">http://www.matronics.com/contribution >> ========== >> >> >> >> ________________________________ Message 5 _____________________________________ Time: 10:20:24 AM PST US From: Pfatchantz Subject: Re: Kolb-List: Re: Kolb Ultrstar Wing Condition eW91IHdpbGwgbG92ZSBzdGVlbCByaXZldHMgd2hlbiB0cnlpbmcgdG8gZHJpbGwgb3V0IHN0YWlu bGVzcyBvbmVzLi4uOi0pICBIZXJiCgpTZW50IHdpdGggW1Byb3Rvbk1haWxdKGh0dHBzOi8vcHJv dG9ubWFpbC5jb20pIFNlY3VyZSBFbWFpbC4KCuKAkOKAkOKAkOKAkOKAkOKAkOKAkCBPcmlnaW5h 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