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Sailing and Motor Yachts in Mahogany and Teak

12-m R-Yachts

IYRU

In 1897, 180 sailing clubs united together to form the "Yacht Racing Union of North America". In Europe things went the opposite way. First, the representatives of numerous sailing organisations met together on the 15th of January 1906 and discussed a new rule of measurement for regatta yachts. After only five days of work they managed to agree upon a linear measurement formula. Following this, the international competitive sailing regulations were discussed. Finally, the "International Yacht-Racing Union" (IYRU) was officially established as the world sailing governing body during the second large meeting from the 14th-16th of October 1907 in Paris.


 

metre Classes

This advancement was a breakthrough, given the long construction times, at that time. The IR-International Rule formula, originating from 1906, meant that, all the sailing boats worldwide could race against each other in regatta, for the first time. It concerned X m-s, where the X represented a number, the m stood for the sail metre - that was the measurement formula and had nothing to do with the ship´s length - and the R was for the rating. The International Formula was first shown in metres, and all the dimensions for this were given in metres.

R-Classes were limiting size classes, you could make selections within certain limits. §§ 19 and 23 of the IYRU specified the minimum weight of yachts and center board boats as follows: 5m class minimum 750 Kg, 6m minimum 1,200 Kg, 7 m minimum 1,800 Kg. It consequently dealt with heavy sailing boats, which were suitable for the sea.

What was significant, was that for the first time, this IR attempted, through extensive regulations, to ensure a longer lifespan for yachts. However, due to the permanent changes in the details of the ship building, the costs could not be contained. The costs rose about 40-50% up to 1914 alone. This was one reason for the many modifications to the formula in the years up to 1933.


 
Anitra
  • L : waterline length
  • d : difference between chain and skin girth
  • S : sail area
  • F : freeboard

Consequently, the measurements differed considerably in detail. In general, however, the following measurement results were reached:


 
DimensionsIn generalAnitra
Length overallca. 21 metres21.10 m
Waterline length:ca. 14 metres13.10 m
Beam:ca. 3.50 metres3.75 m
Draught:2.75 metres2.58 m
Displacement:29 tons26 t
Sail area:170 m²181 m²

 

Following World War II, the America´s Cup was sailed on 12-m R-Yachts up until 1987.
Between 1906 and 1987 around 130 12-m R-Yachts were built.


 

Magnitude

Longer than a bus

Länger als ein Bus

The Anitra, measuring 21.10 metres (69.2 ft) in length, is longer than an articulated bus.


 

Ten-Storeys high

Higher than a ten-storey building

The Anitra is as high as a ten-storey building, with a mast height measuring 26 metres (85.3 ft) above deck, a draught measuring 2.58 metres (8.5 ft) and a deck height of over 2 metres (7 ft).


 

As wide as most country roads

The Anitra is almost as wide as most country roads, with a beam measuring 3.75 metres (12.3 ft).


 

 
 
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