Kasutaja:Suwa/tonniklasside valemeid

tonn = 35 kuupjalga tonni kohta (veinitünn)

1854 Thames tonn

Thames Measurement Rule 1854:

$Tonnid={\frac {(L-B)\times B\times 0,5B}{94}}$

• L = length stempost to sternpost
• B = maximum beam
• ei arvestatud purjepinda ja süvist

1881 Yacht Racing Association Rule

$Tonnid={\frac {(L+B)^{2}\times B}{1730}}$

1902 Herreshoff ja New York Yacht Club

Kapten N. G. Herreshoff

$R=0,18\times \left({\frac {L\times SA^{0,5}}{D^{0,333}}}\right)$

• R - rating - võistlusväärtus

\left( \frac {(L \times SA^0.5)} {D^0.333} \right)

Rating = .18 x ((L x SA.5 ) / D.333 ) which became known as the Universal Rule and, by 1906, was quite popular. However, such a simple rule can easily be beaten, so in order to plug the loopholes the rule became more and more complex. Still, it was used well into the 1930s in the J, M, P, and R classes, each with a maximum rating under the rule. I was born too late to get involved with it, but R boats are the smallest, in the 40-foot range, P boats were a little over 50 feet, M boats even larger and J boats huge, 130 feet or so!