[Leica] BOATING PAD - COMET

[philipprice80 at yahoo.com (Philip Price)]

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
>> 
>> 
>> 
>> 
>> _______________________________________________
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>> 
>> 
> 
> 
> 
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> 
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> 



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