Archived posting to the Leica Users Group, 2009/08/19
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Thanks, Phil. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "Philip Price" <philipprice80 at yahoo.com> To: "Leica Users Group" <lug at leica-users.org> Sent: Wednesday, August 19, 2009 4:23 PM Subject: Re: [Leica] BOATING PAD - COMET > Hi Jim, The magnesium alloys were not treated, they just naturally oxidise > which forms a protective skin. Interestingly the 2000 series alloys such > as 2024 used on aircraft skinning for example are clad with pure aluminium > to prevent corrosion. The other alloys used extensively in aerospace are > the 7000 series high Zinc alloys for strength, will be chromated or > anodised. I have a US aerospace customer that we supply machined > components to and they are all sulphuric acid anodised to prevent > corrosion, we have to achieve a minimum of 15 microns thickness to ensure > adequate protection. Kind regards Phil. P.S. One of my customers builds > Spitfire aircraft, and I know of one that went to the States. > > > > > ________________________________ > From: Jim Nichols <jhnichols at lighttube.net> > To: Leica Users Group <lug at leica-users.org> > Sent: Wednesday, August 19, 2009 4:38:29 PM > Subject: Re: [Leica] BOATING PAD - COMET > > Phil, > > I have an aircraft background. How do they avoid saltwater corrosion with > these aluminum alloys? Do they rely on special paints? Is there some form > of "clad" that protects it? > > Just curious. > > Jim Nichols > Tullahoma, TN USA > ----- Original Message ----- From: "Philip Price" > <philipprice80 at yahoo.com> > To: "Leica Users Group" <lug at leica-users.org> > Sent: Wednesday, August 19, 2009 4:03 AM > Subject: Re: [Leica] BOATING PAD - COMET > > >> Ric / Jim, I work in the aluminium industry, and for many years I worked >> for Alcan, which is how I got to spend three years in Riverside CA., and >> where our daughter was born, she kept her US passport ! What I thought >> you may find of interest is that the aluminium alloy used in hulls is an >> aluminium 4 / 5 % Magnesium alloy in rolled form its extremely ductile, >> it work hardens from forming, and was first invented in the early 1920 `s >> and used on lifeboats for the ocean going liners of the day. Another >> interesting story about these alloys is that they were used to fabricate >> the body panels on Land Rovers, this was due to steel being rationed in >> Britain after the end of the Second World War, for some reason aluminium >> was not. >> >> I know this story as I started my career in the 1960 `s at the mill >> supplying Rover, and there were still people there from the immediate >> post war years who were involved in the development phase. Sorry, this is >> not photography but these exchanges lead off into all sorts of different >> directions, which makes being a LUGer so interesting !!! Kind regards >> Phil. >> >> >> >> ________________________________ >> From: Jim Nichols <jhnichols at lighttube.net> >> To: Leica Users Group <lug at leica-users.org> >> Sent: Tuesday, August 18, 2009 6:51:11 PM >> Subject: Re: [Leica] BOATING PAD - COMET >> >> Now that is CLASS! >> >> Jim Nichols >> Tullahoma, TN USA >> ----- Original Message ----- From: "Richard Taylor" >> <r.s.taylor at comcast.net> >> To: "Leica Users Group" <lug at leica-users.org> >> Sent: Tuesday, August 18, 2009 12:41 PM >> Subject: [Leica] BOATING PAD - COMET >> >> >>> Comet is a traditional 42-foot powerboat designed in the style of a >>> 1920's commuter yacht. Her aluminum hull is driven by a pair of 370 HP >>> diesels to a maximum speed of 30 knots and typically cruises in the >>> 20's. I've only seen her at top speed once and, of course, I didn't have >>> my camera with me that day. Lyman Morse built her in 2002. She's >>> beautiful. >>> >>> http://gallery.leica-users.org/v/rtaylor/PICKS/2009_boating_pad/300_4995.jpg.html >>> or >>> http://tinyurl.com/oonl34 >>> >>> You can learn more about her here: >>> >>> http://www.lymanmorse.com/boatDetails.php?boatID=26#2 >>> >>> D300, etc. except ISO 1600 this time (by accident) but to few bad >>> effects except a bit more contrast than usual. I almost always shoot at >>> ISO 400 on the water. >>> >>> C&C enthusiastically received. >>> >>> Regards, >>> >>> Dick >>> >>> >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >>> >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> >> >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> >> > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >