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This is the 49er for VSK5, from the same boat yard as the Fireball and Musto Skiff.

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Boat/49er
Credits GBR13697, vsk-aus
ZIP file File:49er.zip
File size (MB) 1.8
Download URL(s) http://www.vsk-aus.com/index.php?option=com_remository&Itemid=50&func=startdown&id=2031
Compatible game(s) 5 - VSK5
"-VSK5" can not be assigned to a declared number type with value 5.
<upload polar diagrams>
<upload wind shadow diagrams>
Description of boat
The 49er, like most asymmetric dinghies and skiffs, generally sails windward/leeward courses. The asymmetric spinnaker is not a reaching sail, and is best used at TWA of at least 150 in lighter breezes and up to 170 in a Force 7. You can look at the polar diagrams in the Editor.
Popularity 0 fans / 30 members
Compatible skins

Helm
The boat is designed to give a small advantage to manual trim over automatic. However, the 49er is a very technical and demanding boat in real life, and the VSK5 version in manual trim is no different. The normal technique is to ease the sails slightly to keep the boat upright. The boat will still heel if sailed close to the wind with the spinnaker hoisted, but you should still aim for less heel than auto. The manual advantage will quickly be wasted without concentration on accurate trim, and it is very easy to capsize. Needless to say, a manually trimmed boat is slower than auto if it is capsized! The result should be a reasonable balance where the boat is competitive on auto, but a small speed advantage is possible for those who wish to use their skill and risk the odd capsize.

Head-sail parameters for Boat/49er
Parameter Sail 1
1
Sail 2
2
Sail 3
3
Sail 4
4
TWS
knots

min
   nom   

   nom   
max

   nom   
max

   nom   
max

TWA
degrees
assumes
nom TWS
min


opt

min


opt

min


opt

min

opt'n
opt
opt'x

Change
seconds
Comment

True wind angle (TWA) for maximum boat speed (BS) varies with true wind speed (TWS).
Refer to a boat's polar diagrams for more precise data.


  • For help installing this boat model read the article: Boat models.


3D model compromises
The 49er has a very bent mast and, since VSK5 does not really do bent masts, some compromises were necessary. In my view, a 49er with a straight mast would not even look like a 49er, so I hope you will agree that the compromises were worthwhile.
You might notice that small gaps appear between the mainsail and the mast at times, particularly when the sail is not trimmed correctly or when it is flapping. The head of the spinnaker also comes away during gybes. For the same reasons, shrouds, stays, trapeze wires, and upper shrouds have been omitted (the top of the mast rotates, and would part company with these items as it does so). These are not bugs or glitches, but necessary compromises to achieve the visual aims, and I hope they do not impair your enjoyment of the boat.
One word of warning on the application of the ISAF RRS with this boat. The outline of the boat for overlap purposes etc. does not include the Spinnaker or Spinnaker Boom. Consequently, the spinnaker and spinnaker boom will not count for the purposes of gaining an overlap around downwind marks etc.

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