(Oct 2003) microSAIL! is proud to announce that we have retained the services of David Hollom a world renown yacht and foil designer to design the foils for the new F100CBTF as well as for other projects. Foils are critical for many of our R/C designs and this association brings us the ability to feature state of the art optimized foil designs starting with the F100CBTF. (Aug 2003) microSAIL!  announced that Graham Bantock had completed his Formula 100 CBTF design for us. Many iterations of CBTF were looked at but the final version  shows excellent, consistently high performance in all conditions. This is an historic first in model yacht design: the first professional CBTF design ever and the only one licensed by CBTFInc (Dyna Yacht)!  The Wolfson Unit for Marine Technology and Industrial Aerodynamics , well known for their long term involvement in full size yacht design and research, continued to support Graham in the use of the WinDesign VPP in finalizing this design. The current (Jan '04) F100 CBTF design by Graham Bantock has the following principle dimensions: LOA-One Meter LWL- 38.75" Beam-6" Displacement: approx. 7.4lb.s Draft-approx 22.6" Sail Area,Max-1300sq.in.; reefable  microSAIL!   will exclusively produce the boat as a One Design and/or  Formula 100 Class raceboat. See the RC Sailing discussion site (www.rcsailing.net) for more information and watch this website for updates concerning cost, availability ,etc. Tooling for the new boat will be started within two months-we hope. Here are 4 technical renditions of the proposed design

Formula 100 Class

Date: 4/30/03

Comments

There is only ONE one meter class that allows movable ballast or square top rigs and it is the Formula 100 Class. Graham Bantock, the worlds premier R/C racing yacht designer has recently begun a design in this class-he believes in the potential of the class to produce the worlds fastest one meter R/C yacht. But you don't have to buy a Bantock designed boat to participate in the Formula 100 Class ; anyone can design and build a boat or convert some existing boats to this class. US One Meters are great candidates; IOM's are not. The F100 is the first One Meter Class in history to allow movable ballast, square top rigs, hydrofoils and/or water ballast. New sailing skills that are much closer to the skills required when sailing "real" boats are the norm for this class allowing racing on a much higher level than what is possible with a normal fixed keel monohull. Boats are being built now all over the US and help is available for anyone interested from designing thru purchasing a ready to race boat. Contact me at : 321-868-2091 for any questions or info......

And the proof is....

Date: 4/22/03

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Basically, science and physics but that may be a going a little too deep... The proof is in the 11' Moth with the guy sitting out on the rack cleaning the clocks of the old Moths with the guy sitting on the side deck; the proof is in the International Sailing Canoe with its sliding seat movable crew (ballast) system, in the 49'er with twin trapezes and dozens and dozens of other small boats that illustrate the principle that if you increase the righting arm you can increase the righting moment. And if you increase the righting moment you increase the speed. Larger boats like the Schock 40 and Wild Oats illustrate the same basic physical principles as well. On R/C model applications of these systems there seems to be some confusion among some whose time is spent criticizing on the internet as opposed to understanding the physical principles behind these boats. When scaling a Wild Oats or Schock 40 type to a model what changes is the amount of ballast, the amount of sail area, weight etc; what DOES NOT CHANGE is that as these systems are scaled down the same basic physical relationships still work the same way: if you extend the righting arm you will have more righting moment and therefore the boat will go faster. Simple physics. The twin rudder concept is as basic as that as well: while the design and shape of the rudders may change as the boat is scaled down the results achieved with effective twin rudders will not: more maneuverability and better pointing ability. Simple physics. As to racing : as I have repeatedly pointed out NONE of the existing classes allow movable ballast but these new boats will perform like their full size sisters do against similar boats with fixed ballast: they will cream them--they will be faster and they will point higher (CBTF boats). This is not speculation: this is fact---and physics. Many different types of movable ballast boats are being built now all across the US and they will show what they can do in good time; movable ballast boats will play a large role in the future of rc sailing despite antiquated development class rules. And the new skills required to race them well will put these sailors at the top of R/C racing in terms of boat handling skills--just like the sailors are in the full size classes that use movable ballast (crew/canting keels/water ballast)--from the Moth to the Tornado to the Star to the 49'er, to the Schock 40 to Wild Oats, to the Volvo 70 class and the Max Z86 class--all the best sailors race movable ballast boats!! Intensive design and development of CBTF, rack and canting keel/daggerboard systems has been underway for some time and boats using one or more of these systems will start showing up where you live--before too long--and then we can race like never before.....

CBTF /new tech info

Date: 3/8/03

Comments

Canting Ballast Twin Foil Technology has been around for a few years now but is just starting to take off on full size boats. The Schock 40 is the only production CBTF boat so far but Roy Disney and another maxi owner have ordered new CBTF boats designed by Reichel -Pugh to fit the MaxZ86 class. The Volvo Ocean race has recently announced that CBTF will be legal in the new Volvo 70 rule. CBTF technology differs from a canting keel system in that the boat has twin rudders-one forward of the keel strut and one aft of the keel strut. The "rudders" actually perform the function of both the keel and rudder on a normal fixed keel boat relieving the canting keel strut of having to produce lateral resistance. The foils are operated in two modes: 1)- steering-both foils turn opposite directions,2)-Collective- both foils are turned the same direction making it possible to dial out leeway going upwind. This capability makes it possible to go to WINDWARD sideways for short distances, for instance, in pre start maneuvering and in certain other tight situations. One of the major benefits of CBTF is that the twin rudders, with correct placement, actually reduce wave making resistance! No other canting or fixed keel system can effectively do this. In models this system requires a minimum of four channels, preferably with mixing capability (though a mechanical linkage system is possible -just more difficult to install and setup) and A.T.V. on the canting keel channel is required. There are other movable ballast technologies that are simpler and less expensive but probably none faster except multihulls and monohull and multihull hydrofoils . Over the next two years several models will be launched using CBTF . At least one will be a strict One Design that will also fit into the Formula 100 class, the only development class that allows movable ballast.