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Sailonline manual

Manual

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Diff Summary
Title
Date 2007-12-20 07:59:57 2007-12-20 08:00:39
Editor jakob jakob
Tags

2007-12-20 07:59:57 by jakob
2007-12-20 08:00:39 by jakob
25----------25----------
26The basic way of steering is to either set at cons26The basic way of steering is to either set at cons
>tant compass course (CC) which simply means that t>tant compass course (CC) which simply means that t
>he boat will go in a "straight line". The other st>he boat will go in a "straight line". The other st
>eering mode is to set up the boat to keep a consta>eering mode is to set up the boat to keep a consta
>nt angle to the wind, to keep the true-wind-angle >nt angle to the wind, to keep the true-wind-angle 
>(TWA) constant. This means that if the wind change>(TWA) constant. This means that if the wind change
>s in direction, the boat will change its heading t>s in direction, the boat will change its heading t
>o maintain the wanted TWA. You can set any TWA in >o maintain the wanted TWA. You can set any TWA in 
>the range from 0 to 180 degrees where TWA=0 means >the range from 0 to 180 degrees where TWA=0 means 
>that the wind comes from straight ahead, TWA=180 m>that the wind comes from straight ahead, TWA=180 m
>eans that the wind comes from behind and TWA=90 me>eans that the wind comes from behind and TWA=90 me
>ans the wind in from starboard side. Negative TWA >ans the wind in from starboard side. Negative TWA 
>means wind in from port side (port=left). You can >means wind in from port side (port=left). You can 
>choose to steer directly or to delay the effects o>choose to steer directly or to delay the effects o
>f a command by the use of delayed commands. You si>f a command by the use of delayed commands. You si
>mply set up the steering as described above and th>mply set up the steering as described above and th
>en state how many hours the command should be dela>en state how many hours the command should be dela
>yed. Delayed commands is a neat feature that lets >yed. Delayed commands is a neat feature that lets 
>you attend business meetings and wedding dinners w>you attend business meetings and wedding dinners w
>hile helming a 60-foot single handed catamaran in >hile helming a 60-foot single handed catamaran in 
>a full gale! >a full gale! 
2727
28The chart and the race bounds28The chart and the race bounds
29-------------------------------29-------------------------------
t30The shorelines are supplied by the US National Geot30The shorelines are supplied by the US National Geo
>physical Data Center (NGDC). Resolution may vary d>physical Data Center (NGDC). Resolution may vary d
>epedending on the race type. Important to notice i>epedending on the race type. Important to notice i
>s that what you see is what there is. Be aware of >s that what you see is what there is. Be aware of 
>small islands but all water is deep and sailable. >small islands but all water is deep and sailable. 
>Your boat can naturally only sail on water. If you>Your boat can naturally only sail on water. If you
> collide with land the boat will stop, be pulled o> collide with land the boat will stop, be pulled o
>ut from the coastline some distance and be somewha>ut from the coastline some distance and be somewha
>t damaged. The damage is expressed as a certain dr>t damaged. The damage is expressed as a certain dr
>op in boat speed (performance). This loss in perfo>op in boat speed (performance). This loss in perfo
>rmance is temporary and will vanish in a number of>rmance is temporary and will vanish in a number of
> hours. Since the boat has stopped you need to sen> hours. Since the boat has stopped you need to sen
>d a new command to set the boat on a new course. D>d a new command to set the boat on a new course. D
>ue to the implementation on the server, a boat may>ue to the implementation on the server, a boat may
> actually cut a little land corner at special occa> actually cut a little land corner at special occa
>sions. It can happen to all boats but is nothing t>sions. It can happen to all boats but is nothing t
>o calculate on.  >o calculate on.
3131
32The boat performance curves32The boat performance curves
33----------------------------33----------------------------
34The boat performance is expressed in the so called34The boat performance is expressed in the so called
> polar curve, which is visible to you. The polar c> polar curve, which is visible to you. The polar c
>urve state the boat speed as a function of wind sp>urve state the boat speed as a function of wind sp
>eed and TWA. Take time and study the plot to learn>eed and TWA. Take time and study the plot to learn
> how to sail the boat efficiently. Different wind > how to sail the boat efficiently. Different wind 
>speeds are shown with different colored curves. Fo>speeds are shown with different colored curves. Fo
>r a certain wind speed follow the corresponding co>r a certain wind speed follow the corresponding co
>lored curve for all various TWA:s around the boat.>lored curve for all various TWA:s around the boat.
> For a certain wind speed and TWA you can read the> For a certain wind speed and TWA you can read the
> corresponding boat speed as represented by the di> corresponding boat speed as represented by the di
>stance from the origin to the colored curve. The p>stance from the origin to the colored curve. The p
>lot does not differ negative from positive TWAs si>lot does not differ negative from positive TWAs si
>nce our boats are symmetric. Your boat gets the po>nce our boats are symmetric. Your boat gets the po
>lar curve boat speed (=100% performance in the pol>lar curve boat speed (=100% performance in the pol
>ar window) at all times unless you have hit land a>ar window) at all times unless you have hit land a
>nd your boat has some level of damage.>nd your boat has some level of damage.
3535

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Red Eye - Myth of Malham 2025

In 1947, Hugh McLean & Sons of Gourock, Scotland built a radical racing yacht for John Illingworth, soon-to-be Commodore of the RORC, to a design by Laurent Giles. With a masthead rig, giving her ‘free’ sail area per the rules of the time, and short overhangs reducing pitching, Myth of Malham went on to win The Fastnet that year and again in 1949, and to compete in numerous Admiral's Cups. In 1958, in honour of the yacht, the Myth of Malham race was conceived - a mini-Fastnet to the first lighthouse on a rock west of Cowes, Eddystone, rather than the second, to be held in non-Fastnet years. IRL this year it has been raced already, but this stops us not from “Red Eye” racing its online 230nm in Fareast 31Rs, leaving how to deal with the Isle of Wight open to your own discretion.
Race #1847
INFOby brainaid.de
Fareast 31R PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - RED
Race starts: Aug 25th 12:00 Registration Open!
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Africa by Sea 2025 - Maputo to Mogadishu


The fifth leg of our exploration of Africa By Sea takes us north along the length of the Continent’s succulent sub-tropical and tropical Indian Ocean coast. Much fought over by traders and colonists both well-before and after a Portuguese expedition under the command of Vasco da Gama first sailed there from Europe back in the 16th century, it is yet to be properly explored as a yachting destination. With plenty of islands off- and inshore, small and very large, there is much to interrupt your 1900nm voyage and visit in your Swan 65, from Maputo to Mogadishu! Race #1858
INFOby brainaid.de
Swan 65 PARTICULARS
WX Updates:
0430 / 1030 / 1630 / 2230
Ranking: SYC - ABS
Race starts: Aug 20th 17:00 Registration Open!
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