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IDNIYRA Change of Runner Specifications

Effective Date: 
October 01, 2010

Prepared for Runner Tracks by Jane Pegel,
Chairman IDNIYRA Technical Committee

Sailors have been confused by the wording in the runner specifications regarding the, edges of the steel, particularly the edge radii and the fairing and tapering of the edges of the steel.

Most recently there were differences of opinion in the interpretations of the runner specifications during the 2010 World’s Championship.

Since the close of the 2010 Championship, the Technical Committee has been working diligently to find a way to make the specifications more understandable by the average sailor.

Interpretations have been written and in some instances the wording of the specifications has been modified without making changes in the intent of the specifications.

These interpretations and changes in the wording of the specifications become effective October 1, 2010

E. Runners

9. The leading edge of the runner steel is that portion of the edge forward of the sharpened
ice contact edge and higher than ¾” (19 mm) above the ice, measured with the runner in
normal sailing position. The sharpened ice contact edge of the runner steel is along the entire bottom edge and extends forward and upward along the edge of the steel to a point
not exceeding ¾” (19 mm) above the ice, measured with the runner in normal sailing position. The leading edge must be rounded with no sharp angle point and shall be faired to the sides of the steel as allowed in E.12. The sharpened ice contact edge may be rounded or sharpened to an included angle of not less than 75 degrees. The camber (crown) and shape of the sharpened ice contact edge is optional. Along the sharpened ice contact edge, the rounded edge or the sharpened angle is allowed to be faired to the sides of the steel providing the thickness of the steel of plate, insert style or T runners is not reduced below the allowed minimum. (ref. E.1.a., E.2.f., E.2.h).

12. Along the leading edge of the steel (ref. E.9.), the minimum allowed steel thickness of
plate, insert style, and T runners must be reached within .394”' (10 mm) measured from
the normal tangents of the leading edge (does not apply to 'angle' type runners.)