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02-10-2010 05:49 PM
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02-10-2010 06:33 PM
: The Skaters and the Mystic all seem to be all Carbon Fibre.
http://www.turbinemarine.com/project_50_mystic.html
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02-10-2010 06:47 PM
both of them still build glass boats as well, the pleasure Mystic is glass as well as many of the Skaters still being built. The use (and price point) of the boat really dictates what materials go into it.
I believe Peter also starts with a glass skin coat no matter what the rest of the boat is going to be.
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02-10-2010 07:14 PM
yep, the last couple i looked at were all S glass with a single skin of carbon fiber in the inside surface. Not sure what good that does other then for appearance. Still nice either way, you can tell they really take thier time and do some nice lamination. I always liked their tab work and their flatdecking is pure art. To be honest though I'm not a big fan of the bustle but thats just me.
Last edited by glassdave; 02-10-2010 at 07:20 PM.
Throttles- Cleveland Construction/Traffic Light Racing 377 Talon cat
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02-11-2010 09:37 AM
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02-12-2010 12:08 AM
Dave the skin coat has always been cheese cloth and lets not forget that when you look at something that is vaccumed bagged 2 layers of glass can look like one , and all tabbing including the areas that are bonded to the hull and deck that can be seen by the human eye are also cheesed over to hide the seems , and to tell you the truth i can not believe that you said that the carbon fiber on the inside surface of the boat is there for general appearance. Dave my very old friend and not to be rude considering both S and E glass look the same when laminated with epoxy ( Shell ) & cured how can you tell the difference between the two fabrics BY LOOKING AT THE LAYUP ?
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02-12-2010 10:27 AM
He cant and multiple pictures show the lay up. Not to mention when you cut a hole you can see how the layup was done. The 28 Skater was layed up differently. My factory tour showed in detail what laminates were used to build the boat when you purchase a boat.
Nothing like comparing a high end boat made with $9 per yard S glass verse $80 to $170 Carbon Fibre.
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02-12-2010 11:18 AMpro 1, you better check your math, S-glass is almost the same costs as carbon. E-glass is the standard type of glass used in most layups which is costs alot less. and honestly unless testing was done one could easily use E-glass and say its S-glass.
S-glass is comparable to carbon for some of its physical properties, its just not as stiff as carbon.
this is also when using E-glass and carbon together in a layup the carbon does all the work the E-glass is just adding bulk. so to add a few layers of carbon doesn't do as much as you think, and maybe defeat its purpose if you lower the skin thickness because your counting on the carbon.
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02-12-2010 12:26 PM
Material Density
(lb/cu in) Tensile Strength (psi) Modulus 106(psi) Specific Modulus
Veil Surfacing Mat .045 8,000 .7 15
Chopped Strand Mat .058 22,000 1.4 24
Woven Roving .060 40,000 2.0 33
10 oz. Fabric .060 33,000 2.4 40
Tooling Fabric .065 31,000 2.0 31
Kevlar® .050 49,000 5.0 100
Graphite, parallel to fiber .057 170,000 18.0 300
For Comparison
Steel . 280 160,000 22.0 78
Aluminum .100 70,000 10.0 100
Douglas Fir, parallel .020 8,000 1.5 75
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02-12-2010 01:16 PMwhats all that mean ? is that some kind of rebuttal ?
here's some easy reading for you.
http://www.corecomposites.com/reinforcements.cfm
along with
http://www.vectorply.com/pdf/ebx1700.pdf
http://www.vectorply.com/pdf/cbx1800.pdf
if i'm not mistaken skater uses predominately VectorPly glass. so the above two would be a good comparison of E-glass and carbon in a 17 oz glass layup. i'd post the S-glass pdf file but appearently either they don't make S-glass in 45-45 biax or its something special for skater? i've used S-glass for a few small projects in the past and its quite expense and i could only find it in uni-stand rolls.Last edited by skaterdave; 02-12-2010 at 01:29 PM.
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02-12-2010 02:35 PM
Just to clarify, we're stating that skater uses S glass not E glass correct??
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02-12-2010 03:23 PM
S Glass is substantially cheaper then Carbon Fibre. Carbon Fibre is substantially stronger then glass. The new Gulfstream jet and the new Boeing 787 are 100% Carbon. Read numerous articles, technological developments and so forth. At 170,000psi of tensile strength nothing comes close in size or weight.
If carbon fiber is outside your budget, consider using S-2 glass. S-2 glass is a high performance fabric that was developed originally for military applications. It is 30% stronger and 15% stiffer than E-glass. It comes 30” wide in two weights: 3.7 oz. and 5.6oz. One of the big advantages of S-2 glass is that it is compatible with both polyester and epoxy resins, unlike carbon. At a fraction of the cost of carbon, this might be the solution you are looking for! Give it a try.