I’d like to introduce an idea that ClaudioD has been thinking about for a while following his observation that RC sailing classes are thinning out which also makes it also difficult for new modern classes like IACC 120 to make any headway in Europe or the U.S. and we would like your opinion on an idea ?

Basically, the concept is to introduce a mixed class rating formula (similar to large boats) that would allow different RC sailing classes to come together & sail competitively against each other using a basic rating. It’s a concept and not too far from the old “10R” just redefined to increase the scope to allow different RC sailing boats to fit into the formula.

The initial idea is to have different boats in the 110-130 cm LOA length range, to be able to compete together with a simple formula! Not to mention more guys with common passion, having a beer together at end of the day. One could also allow for new boat designs developments later if worthwhile.

Claudio has called it “100R” so those old school sailors familiar with the 10R formula can identify its origins.

The formula (open for discussion) works as follows:

[ LWL(cm) x SA(cm²)] / 8000 = 100 (metric system) with examples of how it would work.

Class M: 125cm x 6400cm² / 8000 = 100.00 here normally the max SA should be 7200cm² for rig A, but bulbs and weights are free.

AC 120: 100cm x 8000cm² / 8000 = 100.00 would be the maximum allowed but with FIN/BULB of 3000g out of 4500g minimum weight - most of the time would sail with 7800cm²

Comparing these two examples, the class M will have smaller sail area (noting that this class uses already 6 different rigs) and would benefit from its longer LWL against a AC 120 that would benefit from max SA that would be offset by its shorter LWL and keel/bulb weight which are governed by the boats own class rules.

The formula works together with basic box rule where ANY class boat that fits within the dimensions of 275 cm x 130 cm. would eligible for racing. The box is split into two parameters to define the only rules with maximum limit for the mast height (200 cm) and the max draft (72cm) from the deck line. Sail rigs maximum 2 … everything else totally free !

It is just a concept open to discussion at this stage, the formula can be modified (I’m sure Claudio is fine tuning it now) to ensure widest range of class fit fairly into the formula.

Would really appreciate your comments and/or suggestions if in your opinion there would be interest using this mixed class using racing formula 100R ?

Cheers Alan