#61
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#62
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In the words of Snidely Whiplash: "Foiled again."
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Some CF, some wood. |
#63
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Well since you asked..............
The daggerboards ( the forward foils) actually curve in below the water and the foil section is cambered to produce lift. Angle of attack of both daggerboards is controlled via a worm gear and belt that is adjusted with a common control line. Positive lift raises the boat, negative lift pulls boat down. Each rudder has a cambered winglet on the bottom of the rudder blade and the rudder head can be tilted to change the rudder angle of attack. You don’t see it in this picture but there is now a gas cylinder attached to each rudder head that is tied into a control system that allows the sailor to set and adjust the amount of angle of attack of the rudders to produce either positive lift (i.e. the rudders want to lift the back end of the boat) or negative lift. The rudders provide both lift and pitch control of the platform while the daggerboard lift determines how high the boat “flies”. This picture is in about 9-10 knots of wind and my boat speed is 18-20 knots. Here’s a great video of the boats actually sailing by three of the best sailors in the world right now. https://www.youtube.com/watch?v=v80uH1I3oMU These three sailors are the helm (Peter Burling), wing control (Glenn Ashby), and foil control (Blair Tuke) for the Team New Zealand defense of the America’s Cup in the AC-75 75’ long foiling monohulls. Last week they clocked 100 km/hr with one of those beasts. Racing started a couple of weeks ago, check it out. https://www.youtube.com/watch?v=ng3Aw7NGZ68 Again, sorry for the thread hijack but it is pretty cool and all of the boats above are +90% carbon fiber construction.
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Doerr Trinity 12 Fret 00 (Lutz/Maple) Edwinson Zephyr 13 Fret 00 (Adi/Coco) Froggy Bottom H-12 (Adi/EIR) Kostal 12 Fret OMC (German Spruce/Koa) Rainsong APSE 12 Fret (Carbon Fiber) Taylor 812ce-N 12 fret (Sitka/EIR Nylon) |
#64
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I have two Rainsong concert series guitars with unidirectional tops (CH-OM1000NS, Al Petteway Signature), one with a black ice top (25 Year Anniversary), and one with the classic weave (WS1000 Reissue). I think the unidirectional top has a “warmer” less bright sound than the black ice and classic top. It may even sound more “woody” Having said that, I really like the tone of my guitars with the black ice and classic weave top and I love the way they look too! I’ve never played a carbon guitar with a wood veneer on the top and compared it to an identical guitar without the veneer. I’d be interested to hear if / how much of a difference the veneer makes to the acoustic sound. |
#65
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I haven't taken the time to re-read this entire post so I'll just spit out my own biases. My Emeralds look great (to me) and also sound great (to me). Who says you can't have both in a CF guitar???
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Emerald X20 Emerald X20-12 Fender Robert Cray Stratocaster Martin D18 Ambertone Martin 000-15sm |
#66
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In the Emerald line, the thin wood veneers are more for decoration (and they are gorgeous!) and do not impart much if any tonal qualities. Much of this is due to the Emerald guitars already being a fairly warm guitar as carbon fiber goes to begin with. I owned 5 Emeralds, 4 with the wood veneer tops and one plain. |