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tink View Drop Down
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Post Options Post Options   Quote tink Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 5:53am
Iím not disagreeing with anyone that the alloy spars differ and that is likely to be tool wear, my point is that it is simple and relatively easy to control and buy a new die as it wears. 


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Paramedic View Drop Down
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Post Options Post Options   Quote Paramedic Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 5:33pm
is a laser mast actually extruded as a laser mast or is it a generic tube?
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 6:31pm
Ok -well replacing extrusion dies will not come cheap. Has anyone got any idea of how consistent Al mast properties are apart from the mast manufacturer-no . I have compared two nominally the same Al masts and found them dramatically different. Now I donít know much about Al , but I do know about composites and if you have good material and a good process you can get a very close control on the laminate properties.
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Post Options Post Options   Quote tink Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 6:56pm
Extrusion dies are about 3K and will do a lot of masts before they wear out. The  on cost to the sailor for good quality control will be minimal. As I said above not arguing that there isnít variations but that with controls there should not be. Not commissioned a new die for a while but have a recent quote for an ongoing project. 
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:03pm
Who controls the quality of the extrusion? Who has any idea whether the mast mast is mid spec top bottom spec or out of spec? Has any customer ever seen this data-sorry if I was off hand on my last post -multi tasking after too much wine!
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Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:05pm
Who controls the quality of the extrusion? Who has any idea whether the mast is mid spec top bottom spec or out of spec? Has any customer ever seen this data-sorry if I was off hand on my last post -multi tasking after too much wine!
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:07pm
Would have thought any manufactured product would have to apply to a certain standard.
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Post Options Post Options   Quote 423zero Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:10pm
https://www.anodisingnorthwest.uk/specifications
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:31pm
Originally posted by tink

Extrusion dies are about 3K and will do a lot of masts before they wear out. The †on cost to the sailor for good quality control will be minimal. †

You obviously know more about this than I do, but if, say, you halve the acceptable range of wall thickness for the spars then won't you also approximately halve the life of the die before it produces sections that are out of spec?
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tink View Drop Down
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Post Options Post Options   Quote tink Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 21 at 7:39pm
Anodising is protection against corrosion it is heat treatment that controls the mechanical properties but it wonít account for the weight differences.
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