16th July: The new foils are nearly ready for the Vampire, a much adapted Marstrom 20. We will rig the boat this weekend at the factory, and snagging problems should be dealt with next week ready for a launch before the end of July.
The design has little in common with the L foils appearing on the Flying Phantom, the Nacra FCS or the America's cup boats. Some basic details:
Length: 6.08metres
Beam with one foil down: 4.7metres
Weight: 180kgs - up from 162kgs last year
Upwind sail area: 22.5 sqm - down from 27.8 sqm last year
Spinnaker: 27sqm. Light winds only
Lift out speed: 12 knots
Theoretical max speed upwind in 12 knots of wind: 19 knots at 50 degrees to true wind angle
Theoretical max speed downwind in 12 knots of wind: 25 knots at 140 degrees to true wind angle
Foil designer: Kevin Ellway (designer of the Exocet Moth)
Builder: Graham Eeles
Originator and owner: William Sunnucks
We want to create a catamaran which sails faster than a Moth. This is a demanding target which may take a while to achieve with consistency: the moths have 10 years of foiling development and once up they are now faster than almost anything else on the water. VPP calculations suggest a Moth could have rounded Texel in under two hours in this year's conditions - the leading boat, a Nacra FCS took 2 hours 30 minutes.
We also want a boat that remains fast in light winds and can be launched from the beach.
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