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LIFTING FOILS


No. of Foils – The maximum number of foils that may be actively in use simultaneously.


With the boat upright in flotation trim, for each foil: Foil Span – The maximum transverse distance outside the hull shell between any two points on the foil in its fully extended position.


Foil Chord – The maximum longitudinal distance of the foil. The IRC Rating Authority reserves the right to require additional detail to be supplied and also to modify the above definitions on a case by case basis in accordance with IRC Rule 2.8.


RIG


BOW OVERHANGS BOW OVERHANGS BOW OVERHANGS


BO


P – The distance between the mainsail (in the case of a schooner, the foremast sail) upper limit mark, which shall be permanently marked by a 25mm band of contrasting colour, and the top of the boom when set at right angles to the mast, or the mainsail tack point whichever is lower, on the mainmast (in the case of a schooner, the foremast). If there is no band the measurement shall be taken to the top bearing surface of the halyard shackle. In the case of a gaff rig, the upper measurement point is the peak point of the mainsail or the head point of the topsail if on board.


x and h both 0 x and h both 0 x and h both 0


Waterplane Waterplane


TRADITIONAL BOW OR KNUCKLE IMMERSED


BOWaterplane BO


TRADITIONAL BOW OR KNUCKLE IMMERSED


TRADITIONAL BOW OR KNUCKLE IMMERSED


BOW OVERHANGS BOW OVERHANGS x and h both 0 h Waterplane BO


TRADITIONAL BOW OR KNUCKLE IMMERSED


HANGS x and h both 0 h Waterplane BO


W OR SED


x BO SCOW BOW OR KNUCKLE EXPOSED Waterplane


BO x


CLASSIC BOW 45° h


Fully retracted Fully down


SWING KEEL


Minimum draft


Fully retracted Fully down


Waterplane


Fully retracted Fully down


Minimum draft


DROP KEEL DROP KEEL DROP KEEL


DROP KEEL 45° 45° h h Waterplane O OR OSED ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| | ||||||||| |


Fully retracted Fully down


Minimum draft


Fully retracted Fully down


Minimum draft


BO x


CLASSIC BOW Waterplane SWING KEEL


Fully retracted Fully down


Fully retracted Fully retracted Fully retracted


Minimum draft


Minimum draft


Minimum draft


CENTREBOARD


Minimum draft


Waterplane


Fully down Indicate on the application form


whether the keel is fixed down when racing whether the keel is fixed down when racing whether the keel is fixed down when racing


Fully down Indicate on the application form


Fully down Indicate on the application form


Maximum draft


Maximum draft


53


Maximum draft


Waterplane Waterplane


Waterplane


Maximum draft


Minimum draft


x


Fully retracted Fully down


SCOW BOW OR


Fully retracted Fully down


BO KNUCKLE EXPOSED


Fully retracted Fully down


Waterplane


Minimum draft


Minimum draft


CENTREBOARD CENTREBOARD


45°


Waterplane Waterplane


Waterplane


Maximum draft


Minimum draft


CENTREBOARD CENTREBOARD


Maximum draft


BO x


Maximum draft


Waterplane


Maximum draft


CLASSIC BOW 45°


Waterplane Waterplane


Waterplane h


PY – The distance between the mizzen (in the case of a schooner, the mainmast sail) upper limit mark which shall be permanently marked by a 25mm band of contrasting colour, and the top of the boom when set at right angles to the mast, or the mainsail tack whichever is lower, on the mizzenmast (in the case of a schooner, the mainmast). If there is no band the measurement shall be taken to the top bearing surface of the halyard shackle.


E – The outer point distance of a mainsail (or in the case of a schooner, a foremast sail). The outer limit mark shall be permanently marked by a 25mm band of contrasting colour. If there is no band the measurement shall be taken to the aft end of the boom. For the measurement of outer point distance, ERS H.4.2 shall not apply. Fittings, local curvature, local cutaway and any increase in the fore/aft dimension of a sail track and/or sail track support, shall be ignored.


45° 45°


h


KNUCKLE EXPOSED KNUCKLE EXPOSED KNUCKLE EXPOSED


SCOW BOW OR SCOW BOW OR SCOW BOW OR


xBO BO


x BO


EY – The outer point distance of a mizzen (or in the case of a schooner, a mainsail). The outer limit mark shall be permanently marked by a 25mm band of contrasting colour. If there is no band the measurement shall be taken to the aft end of the boom.


h x


Waterplane h


Waterplane Waterplane


BO x


Waterplane Waterplane


Forestay – The ERS definition of forestay shall not apply. Forestay is defined as: permanently attached rigging providing forward support for a mast spar.


CLASSIC BOW CLASSIC BOW CLASSIC BOW


BO x


BO x


SWING KEEL SWING KEEL


SWING KEEL SWING KEEL


45° Waterplane 45°


45° 45°


h h h 45°


Maximum draft


Maximum draft


Waterplane


Maximum draft


Maximum draft


Waterplane


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