Above picture

A class boats waiting for the next heat of the 2008 Australian A class Championship

66 Chris Ryan & 71 Rod Clack

 

                                              

Above picture

No. 11 - Bill Hutchison Scalpel on its way to win the 2008 Australian Championship, being sailed by Rob O’brein

 

 

International One Metre Class (IOM).

 

The International One Metre Class (IOM) is the smallest and newest International radio sailing class and has a strong International following. The newly formed International One Metre - International Class Association has taken over responsibility for management of the class and Australia was the first National Class Association recognised by the International body.

 

The class rules are very tight with three one design rigs permitted and restrictions on construction materials, overall and ballast weight, and draft. There is a maximum overall length of one metre and a minimum weight of 4 Kg.  These rules are aimed at controlling costs and enabling the amateur builder to produce a competitive yacht.

The IOM is sailed in all Australian States and is Australia’s fastest growing class with over 500 boats registered.  The current World IOM Champain Brad Gibson from

NSW.

 

Marblehead Class(M's)

The Marblehead was developed by Roy L Clough of the Marblehead Model Yacht Club in Massachusetts, USA and given International status by the predecessor of the ISAF-RSD in 1937.

A restricted development class, the Marblehead  is controlled by a few maximum  dimensions, overall length (1.29 metres), sail area (0.5161 square metres) and draft of 660 mm.  There is ample scope to develop hull shape, rigs, foils etc.  Current designs are around the 4 Kg all up weight

 

The most popular of the International classes for many years until recently challenged for this status by the IOM, the Marblehead is sailed in all Australian States and has a big following in Queensland.

 

International Ten Rater Class(10R)

The International Ten Rater is a development class and the rule is a direct descendent of the length and sail area rule of 1887. The measured waterline length X measured sail area in square metres X 8 must not exceed 10.

 

Most Ten Raters are between 1.4 and 1.7 metres overall and weight 5-7 Kg. Boats in the class have a spectacular performance and they are generally the fastest of radio yachts. They are popular in most States