On November 5, 1892, it was announced in the 'Field' that the Union
des Yachts Français had decided to adopt a hull-and sail-area rating,
it being considered by the 'active element in French yacht racing'
that 'the type ... produced by the French length and girth rule is
inferior to the type produced by the British and American rules ...
British yachts having defeated those of France, although handicapped
by the French rule of rating.' The conclusion was scarcely a logical
sequence from the premisses. It should have been that French racing
yachts were not the correct evolution of the French rule of rating.
But we are now concerned with the new French rule (proposed by M.
Godinet) in which sail is an important factor.
+---------------+-------+-------+--------+--------+--------+-------+
| Name of yacht | L | S | [V¯]S | M | XI. | XII. |
+---------------+-------+-------+--------+--------+--------+-------+
| Genesta | 81.0 | 7,643| 101.40 | 91.27 | 94.21 | 87.39 |
| Volunteer | 85.9 | 10,270| 87.43 | 105.42 | 100.24 | 93.30 |
+---------------+-------+-------+--------+--------+--------+-------+
| Chiquita | 45.5 | 2,636| 51.36 | 31.32 | 53.20 | 49.35 |
| Ghost | 46.5 | 2,577| 50.77 | 34.60 | 48.10 | 47.38 |
| Minerva | 40.0 | 2,700| 52.00 | 29.73 | 50.39 | 46.00 |
+---------------+-------+-------+--------+--------+--------+-------+
| Dis | 36.0 | 1,658| 40.71 | 22.37 | 36.23 | 36.00 |
| Decima | 35.67| 1,679| 40.94 | 22.17 | 37.23 | 36.71 |
| Doreen | 38.05| 1,572| 39.62 | 21.67 | 38.34 | 38.23 |
+---------------+-------+-------+--------+--------+--------+-------+
| Oread | 28.2 | 1,063| 32.60 | 13.33 | 31.25 | 29.82 |
| Quinque | 33.0 | 900| 30.00 | 13.33 | 30.93 | 32.02 |
| Valentine | 29.8 | 996| 31.56 | 14.47 | 28.50 | 29.08 |
| Bedouin | 30.0 | 1,000| 31.62 | 14.96 | 28.00 | 28.92 |
+---------------+-------+-------+--------+--------+--------+-------+
| Madcap | 21.0 | 714| 26.72 | 9.97 | 20.89 | 20.97 |
| Lady Nan | 23.0 | 653| 25.55 | 8.63 | 24.16 | 23.63 |
| Dolphin | 25.7 | 581| 24.10 | 8.27 | 25.07 | 25.41 |
+---------------+-------+-------+--------+--------+--------+-------+
In its simplest form, it is:--
English R = (4L - G) G[V¯]S ÷ 520 (XIII.)
G. being the greatest girth from top of deck planking port, round keel
to ditto starboard, plus extreme beam. Each of the three factors L. G.
[V¯]S. being linear (metric measure) the result is given in cubic
form, and is converted into English rating by the divisor selected,
and the Y.R.A. time scale has been adopted by the Union des Yachts
Français.
Public-domain text, read in full here on John Shaqi.
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