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Sailonline manual
ManualBack to Snip <-- Previous Change | Next Change -->
| Diff Summary | |||||
|---|---|---|---|---|---|
| Title | |||||
| Date | 2007-12-20 07:59:57 | 2007-12-20 08:00:39 | |||
| Editor | Jakob Kuttenkeuler | Jakob Kuttenkeuler | |||
| Tags | |||||
| 2007-12-20 07:59:57 by Jakob Kuttenkeuler | 2007-12-20 08:00:39 by Jakob Kuttenkeuler | ||||
|---|---|---|---|---|---|
| 25 | ---------- | 25 | ---------- | ||
| 26 | The basic way of steering is to either set at cons | 26 | The 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! | ||
| 27 | 27 | ||||
| 28 | The chart and the race bounds | 28 | The chart and the race bounds | ||
| 29 | ------------------------------- | 29 | ------------------------------- | ||
| t | 30 | The shorelines are supplied by the US National Geo | t | 30 | The 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. | ||
| 31 | 31 | ||||
| 32 | The boat performance curves | 32 | The boat performance curves | ||
| 33 | ---------------------------- | 33 | ---------------------------- | ||
| 34 | The boat performance is expressed in the so called | 34 | The 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. | ||
| 35 | 35 | ||||
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