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     Jeff Roy New member Username: Jeffr Post Number: 65 Registered: 03-2001 Rating: N/A |
Russ or Loren, How were those numbers derived? I have a copy of the US Sailing Performance Package for a "stock" 9.1 and the polars in it are quite different. This is what they list as "optimum" <table> <tr> <td> <div> Upwind</div> </td> </tr> <tr> <td>True Wind Speed</td> <td>Boat Speed</td> <td>True Wind Angle</td> <td>Appnt Wind Speed</td> <td>Appnt Wind Angle</td> <td>Heel</td> <td>VMG</td> </tr> <tr> <td>6</td> <td>4.411</td> <td>44.7</td> <td>9.36</td> <td>25.4</td> <td>4.3</td> <td>3.135</td> </tr> <tr> <td>8</td> <td>5.174</td> <td>44.3</td> <td>11.85</td> <td>26.5</td> <td>10.0</td> <td>3.706</td> </tr> <tr> <td>10</td> <td>5.531</td> <td>42.7</td> <td>14.03</td> <td>27.2</td> <td>13.7</td> <td>4.063</td> </tr> <tr> <td>12</td> <td>5.712</td> <td>41.4</td> <td>16.07</td> <td>27.8</td> <td>16.0</td> <td>4.284</td> </tr> <tr> <td>14</td> <td>5.821</td> <td>40.5</td> <td>18.03</td> <td>28.4</td> <td>17.5</td> <td>4.423</td> </tr> <tr> <td>16</td> <td>5.887</td> <td>40.1</td> <td>19.94</td> <td>29.1</td> <td>18.7</td> <td>4.505</td> </tr> <tr> <td>20</td> <td>5.936</td> <td>40.2</td> <td>23.66</td> <td>30.9</td> <td>20.5</td> <td>4.535</td> </tr> </table> <p></p> <table> <tr> <td> <div> Downwind</div> </td> </tr> <tr> <td>True Wind Speed</td> <td>Boat Speed</td> <td>True Wind Angle</td> <td>Appnt Wind Speed</td> <td>Appnt Wind Angle</td> <td>Heel</td> <td>VMG</td> </tr> <tr> <td>6</td> <td>4.141</td> <td>143.1</td> <td>3.55</td> <td>98.6</td> <td>0.9</td> <td>3.311</td> </tr> <tr> <td>8</td> <td>4.939</td> <td>147.3</td> <td>4.52</td> <td>111.0</td> <td>1.1</td> <td>4.154</td> </tr> <tr> <td>10</td> <td>5.294</td> <td>158.0</td> <td>5.17</td> <td>137.3</td> <td>0.8</td> <td>4.939</td> </tr> <tr> <td>12</td> <td>5.841</td> <td>165.4</td> <td>6.21</td> <td>151.8</td> <td>0.7</td> <td>5.654</td> </tr> <tr> <td>14</td> <td>6.294</td> <td>170.3</td> <td>7.51</td> <td>162.2</td> <td>0.6</td> <td>6.205</td> </tr> <tr> <td>16</td> <td>6.689</td> <td>172.9</td> <td>8.99</td> <td>167.6</td> <td>0.7</td> <td>6.638</td> </tr> <tr> <td>20</td> <td>7.385</td> <td>174.1</td> <td>12.16</td> <td>170.5</td> <td>0.9</td> <td>7.346</td> </tr> </table> (man that was a lot of typing!) It appears these polars recommend narrower angles at lower speeds than Loren's | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Russ Fender (Admin) Rating: N/A |
Bob, the following Polars were provided to me by Loren Thompson our Membership Director. I hope they help you out. If you have any questions feel free to contact Loren, his email is located on the Class Officer page. Russ Fender Class Commodore
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| Bob Goodwin Rating: N/A |
Just bought Hull #31 (Whisper, ex Cowardly Lion) now renamed "Survivor". I sail in Southern California, home port is Channel Islands Harbor in Oxnard. Does anyone have a set of polars for their 9.1? I've been racing for 20 years, the last 15 on my NY 36 (an 80% fractional rig), which I sold in a moment of weakness. It seems that I should trim the boat as if it were a fractional rig, due to the large main. Sailed our 1st race and took a 2nd in a 3 race regatta. The boat seems to come alive when "caps" show up (10 knots +). Any tips would be greatly appreciated. |
