Is iFLY15 Hydrofoil Catamaran able to fly in less than 5kts. / 2Bft. of wind? See in this video iFLY15 taking off and staying airborne, while being sailed in different configurations: single handed, 2-Up with crew weight 180kg, with and without "CodeF". The revolutionary "CodeF" is an iFLY development and gets rid of numerous disadvantages of classic Code0 on a foiling boat. This innovation allows to fly as well downwind as upwind in the lightest breeze, always with zero rudder force. The sail creates lift, as it is not vertical. The foot of the sail closes with the deck, so no loss of pressure, like on the deck sweeping mainsail. "CodeF" light wind foresail : The Code0 for Foiling.
comment of James Aron :
" So, the angled headsail is actually a performance feature and not for the lack of a bowsprit? "
iFLY15 Foiling Catamaran :
" If we were thinking a conventional Code0 and bowsprit would be the best solution for a foiling catamaran, we just would have added a bowsprit and would have gone for a Code0. During AC even in lightwind racing we have observed, that the Code0 have not been used. They are not ideal. iFLY developed the new foresail concept of CodeF (name derived from Code0 for Fly) to achieve the following features: i) take off in lightest winds of 6-7kn and stay foiling in 5-6kn (2-3kn lower wind needed than e.g. the AC75 or GC32). ii) 100% full foiling upwind (up to 20degree apparent wind angle) and on all other courses iii) neutral rudder with CodeF and without CodeF (which is the case beyond 9-10kn). No tendency to bear away when headsail is up iv) fast and easy hoisting and storing away on the water v) not compromising the "normal" simple iFLY handling when sailing without CodeF, easy to take sails and all it's components from the boat, no furler, snuffer... vi) avoid disadvantages of Code0: tack too much foreward - problems when sailing upwind, setup of sailplan changed, boat wants to bear away vii) no additional weight and cost from bowsprit viii) no danger of injury resulting from bowsprit ix) center of headsail wind forces lower than Code0 - not so much heeling moment, compromising righting moment. Code0 is high, as tack needs to be high enough not to pierce waves with the bowsprit. CodeF tack is a lot lower and more aft, at the bow. x) CodeF foot is at deck level and closes with deck - no loss of pressure. perfect cooperation with decksweeper mainsail, creating jet xi) no additional drag in the air by bowsprit with stabilizing lashings etc, no snuffer ... xii) CodeF not only creating propulsion, but additonally creating lift, as sail in diagonal xiii) CodeF being excentered, not in the middle in front of mast, not interfering with mainsail. Allowing longer foot of sail xiii) CodeF is easy to tack and gybe, actively pulling tack to new leeward ... CodeF is a completely new concept of a headsail. "
James Aron :
" @iFLY15 Foiling Catamaran Wow, great comment. Was simply curious but you provided an unexpected wealth of information. "
iFLYsail.com
#lightwind-foiling #iFLYacademy #tutorial #Sound-of-speed
29 мар 2020
