The C4 has been developed as a real world slalom/speed sail.
4 Cams, pentex/polyester/kevlar cloth mix with 6 Roll/Wrapped pre-preg Carbon tube battens, this is one high end sail. Designed to have an ULTRA RIGID and locked up lower section, the framing of the sail means the higher the loading the more rigid the foil becomes, perfect for mad 35-40 Knot broad reaches. Body armour is a very good idea with this sail, youll be sailing seriously quick!
The 6.0 C4 has been clocked by GPS at 40.5 Knots in chop and with the ability to sync a digital camera's time recording stamp with the gps this is exactly what it looks like to do it, here. Sailor is Simon Hinkley on a Demon Design C4 6.0m sailing at stithians lake in cornwall. Allthough there are many people achieving fast times nowadays to do so in chop, on Stithians lake.....regularly..... is a whole other thing- not many can- simon is one of them.
The polar Graph for a 39 knot day is above, the darker shades are average values, the lighter- peak values and the dotted lines VMG. (graph outputed from the superb GPS action replay (www.gpsactionreplay.com) software ). Location Daymer bay, Cornwall, UK. Given that the upwind legs were a chance for a rest and they were achieved with a 30cm selct fin its impressively fast upwind as well as down.
These sails are currently available in the following sizes
6.0, 6.8, 7.5, 8.2, 9.0.
The strength of the 6.8 size is its efficiency- its easily capable of twice windspeed, and with good technique(and lightish winds) up to 2.3-2.5
The C4 has proven ability in speed sailing being used to win the Amateur fleet at Weymouth speed week 2006 (in the hands of Simon Hinkley aka Speedsailor), and consistently place in the top ten of the whole fleet all week. The 7.5 C4 was used by Matthew Burridge to get second fastest time of the day on the 3rd of October with 29.77 Knots for the 500m.......not impressive? not really.... as a 500m time, however when you realise that Bjorn Dunkerbeck won the day with 29.88 knots only 0.11 knots faster it looks a whole lot better!
For prices and sizes see here
