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    Posted: 08 Jul 13 at 7:04am
Originally posted by RS400atC



Originally posted by iGRF

Why am I not surprised you were an F2 victim?
I knew the red trim on the sails was a throwback to something in the 90's.


How is carbon fibre epoxy based?
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hollandsd View Drop Down
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Post Options Post Options   Quote hollandsd Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 8:02am
The "glue" used to stick the fibers together can be Polyester, epoxy or a vinylester.
This is the same for carbon, kevlar, glass, diolen, twaron and alufiber amongst others.

Dan


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Post Options Post Options   Quote blaze720 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 9:35am
Greame

Must we presume, based on a more recent insight into your creative side that you indeed fashioned  your own boards from blocks of foam with a rather blunt Stanley knife and a pot of 'sticky stuff' ?   In the days when I had a 'proper job', rather than 'messing about' with boats,   the F2 of the day was a good off the sdhelf option for us slightly heavier ones and well we must had thought the makers had got it about right. 

For the records I also used Mistral boards, a Peter England custom one, and a heavily 'stanley knifed'  Tornado that needed a proper plate case inserted ... cos we all know deep down the manufacturers really don't know what they are doing don't we  ....   Wink   ... but at least the board world was routinely using carbon rigs goodness me THIRTY+ something years ago.  

Mike L.
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Post Options Post Options   Quote iGRF Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 10:36am
Once upon a time I was as you probably know, quite handy at fiddling with boards to make them go faster, it was me that introduced the mast track, the first one fashioned from a bit of dinghy track and fitted to a board I got built by Parkers, I also cut the first fully retracting centre board into an old TC39 so you didn't have to reach down and pull the centreboard in windy races. Back then if you wanted anything you had to tap into the upper levels of dinghy technology, which, in the late seventies was still quite edgy, it only seemed to lose it's way in the latter part of the eighties I guess.
I/we tried lots of things, boom vangs, topping lifts, cyt, mylar scrims, aluminium honeycomb from a place on the isle of white, foam filled boards, hollow boards, jibing centreboards, flip back fins, even going as far as to eject racing waterski's off the front of a board once it came up to speed.
As to the carbon epoxy thinking, that comes about because for the most part they use epoxy in pre preg which gets delivered in vans that look like that scene out of 'back to the future' when the delorean comes out of the smoke filled truck.
In the Columbia Gorge where a lot of sailboard development went on they have the benefit of Boeing just up the road and lots of the windsurfers were ex Boeing types, even today, they are making great developments in resin technology only this time not letting their intellectual property go out to china in the name of increased profits and job exporting. It seems they may have learned to reel in the banker and accountants desire for quick returns, the Obama administration is helping local manufacturers with grants precisely to that end.
A shame the likes of you and I can't tap into something similar here, all we get is access to government funded jobs for the boys consultants giving us 'advice', it's not advice we need it's development capitol, we know what to do with it.

Oh dear I seem to have gone off on another rant... sorry

Edited by iGRF - 08 Jul 13 at 10:40am
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Rupert View Drop Down
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Post Options Post Options   Quote Rupert Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 11:54am
Did you invent the wheel, too?
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Post Options Post Options   Quote 2547 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 11:56am
Originally posted by iGRF

Once upon a time I was as you probably know, quite handy at fiddling with boards to make them go faster, it was me that introduced the mast track, the first one fashioned from a bit of dinghy track and fitted to a board I got built by Parkers, I also cut the first fully retracting centre board into an old TC39 so you didn't have to reach down and pull the centreboard in windy races. Back then if you wanted anything you had to tap into the upper levels of dinghy technology, which, in the late seventies was still quite edgy, it only seemed to lose it's way in the latter part of the eighties I guess.
I/we tried lots of things, boom vangs, topping lifts, cyt, mylar scrims, aluminium honeycomb from a place on the isle of white, foam filled boards, hollow boards, jibing centreboards, flip back fins, even going as far as to eject racing waterski's off the front of a board once it came up to speed.
As to the carbon epoxy thinking, that comes about because for the most part they use epoxy in pre preg which gets delivered in vans that look like that scene out of 'back to the future' when the delorean comes out of the smoke filled truck.
In the Columbia Gorge where a lot of sailboard development went on they have the benefit of Boeing just up the road and lots of the windsurfers were ex Boeing types, even today, they are making great developments in resin technology only this time not letting their intellectual property go out to china in the name of increased profits and job exporting. It seems they may have learned to reel in the banker and accountants desire for quick returns, the Obama administration is helping local manufacturers with grants precisely to that end.
A shame the likes of you and I can't tap into something similar here, all we get is access to government funded jobs for the boys consultants giving us 'advice', it's not advice we need it's development capitol, we know what to do with it.

Oh dear I seem to have gone off on another rant... sorry

I'm confused I thought you had invented windsurfing and that Hoyle Schweitzer had just copied you ... I also hear you invented the SUP ...
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Chris 249 View Drop Down
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Post Options Post Options   Quote Chris 249 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 11:56am
My Tasar's in the shop getting renovated; structural work to fix 35 years of wear and tear, full respray, etc. To emphasise the makeover I've got some nice carbon hollow tube (from the ends of cut-down SUP handles) that will be used to make the world's lightest corrector weight container. The end caps will be some circles of Nomex/carbon out of a renovated 747.

I need suggestions for ridiculously OTT (but economical) ways to make the end caps removable, so I can drop chunks of lead inside and then secure them after measurement (with the lead back inside!).

Will securing the whole assembly to the pillar under the mainsheet block with titanium bolts look slick enough, or can anyone think of a more high-tech and completely unnecessary way of making an over- the-top corrector holder? 

She's also getting carbon waterbottle holders from a bike; if you're going to have 1000g of water then it's logical to save 2g by using carbon brackets, innit. I just realised that I should have bought the streamlined water bottles used for time trial bikes, as they would create smoother airflow over the rear cockpit bulkhead.... as everyone who has used fake carbon knows, every bit counts! Tongue

I was going to use some more of the Nomex/carbon sheet to make a bracket to secure a home coffee machine in the galley of my old half tonner, but sadly I'm not going to have enough battery power to make it worthwhile. We'll just have to revert to a carbon bracket for the manual espresso machine and the titanium coffee whisker.   :-(

Any further suggestions for ridiculous ways to use a few pieces of carbon/Nomex on a scruffy old cruiser/racer will be gratefully received.


Edited by Chris 249 - 08 Jul 13 at 12:03pm
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Post Options Post Options   Quote RS400atC Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 12:04pm
Just use some nice coloured insulating tape?
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Post Options Post Options   Quote yellowwelly Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 12:12pm
Originally posted by Chris 249

 

Any further suggestions for ridiculous ways to use a few pieces of carbon/Nomex on a scruffy old cruiser/racer will be gratefully received.

can I recommend the following for the heads... 


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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 08 Jul 13 at 12:15pm
Chris, if its an old enough 747 that's being scrapped/renovated then there will be DU (depleted uranium) counter balance weights.

DU correctors are obviously superior as taking up less bulk, but a too readily removable end cap might be considered undesirable. Incidentally, bearing in mind the application, I suggest tungsten rather than titanium bolts.
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