In the animation below, you can click on the numbers on the green vertical stripe. The numbers represent the angle that a sailboat is sailing to the wind. For example 90 means that if you are looking in the same direction as the sailboat, the wind would be coming over your left shoulder. First, just to get the feel of things, try a few random clicks and watch the boat move on the graph.
Right, now back to the explanation. The graph with the funny looking backwards C curve is called a Polar Plot, and it usually scares most people away because of it potential complexity � but thanks to the graphic, now it is simple to explain. A properly trimmed sailboat will track this C curve. You can read the Polar Plot by placing the boat on the C curve and tracing around the concentric arc to determine the speed of the boat.
For example, click on 60, this will point the boat so that it is sailing at 60 degrees off from the wind direction.
Now Boat Sailing Gif Quizlet trace around the arc to see that the boat is achieving 8 knots. Similarly, click on and see that the boat is achieving 8. No other intersection with the C curve produces a higher number when following the arcs around to the vertical line. This indicates that the wind is not able to fill the sails properly and thus can not produce any significant forces on the sails. At zero degree directly into the wind the boat is making zero speed.
So, then from this polar plot, to find the speed of your boat towards your destination at a specific angle to the wind, just follow the arc around at a point where the angle to the wind meets the C curve. But, you say � I want to drive my boat in the direction of the wind. The polar plot also shows this. The horizontal line at 90 degrees originates at zero knots. IE zero knots towards a windward destination.
So now the question begs then � at what is the best angle should I sail in order to make my windward destination in the fastest time? I mean 30 looks pretty good. The boat speed from the wind meter is 5. Or what about 20? The answer lies by drawing a horizontal line that touches the apex of the C curve. The boat speed is 6. No other higher horizontal line touching the C curve can be attained. Thus the answer is, head 40 degrees off the direction from the wind.
Your boat speed will be 6. Sail trimmers will use the 6. You can follow the sail positions on the wind meter to see how they should be trimmed to optimize your speed for a given wind direction. So now, what about a direct downwind destination? It would seem like that since the boat can physically sail downwind that you should just head right for the destination, right?
Well, not so fast. We want a horizontal line that produces the biggest number that touches the lower apex of the C curve. Hmmmm that looks like at about degrees.
Click on The boat speed is 8 knots, and drawing a horizontal line across gives us a 5. Alternatively, if you click on degrees the boat speed has dropped to 5. Of course we mean here that you zigzag downwind by sailing degrees clockwise, then gybe over to sail degrees counter clockwise. Caveats: This polar plot shown is for a specific boat at a specific wind speed. Each manufacturer produces a series of polar plots for each specific model and for specific wind speeds.
Many sailboats have electronics that use polar plots to optimize VMG. For more information and online sailing courses , visit NauticEd.
Back Explore View All. Back Types View All. Unpowered Boats Kayaks Dinghies. Personal Watercraft Personal Watercraft. Back Research. Reviews Boats Engines and Parts. How-to Maintenance Buying and Selling Seamanship. Back Services. Boats PWCs. Boats for Sale View All. Or select country. Search Advanced Search. Personal Watercraft for Sale View All. Liked it? Share it! Facebook Twitter. Boat Insurance Zuzana Prochazka. Paul Grimes. Understanding Propeller Pitch Lenny Rudow.
Boat Reviews. Wetsuit Jeff Hemmel. Boating Guides. Boat Buyer's Guide. Boat Seller's Guide. Spring Commissioning for Your Boat. Popular Articles Related Articles 1.
Five Affordable Trawlers Under 40 Feet. What Hull Shape is Best? Best Boat Brands. What Type is Right for You? Top 10 Choices for Boaters. Boat Insurance Understanding and Choosing Marine Surveyors. Understanding Propeller Pitch. Basic Sailing and Seamanship: Sail Trim
Croix focuses upon fishing rods. Screw transom in place, you. Any freshwater physique of H2O in Florida has alligators. Taxation - This was a prior boats proposal (i. As well as keep in thoughts boat sailing gif explained, freshwater fishing as well as ofshore fishing boats permitted.
|
Wooden Kitchen With Washing Machine Jack Old Super Yachts For Sale Roblox Fishing Boats For Sale Brisbane |
04.02.2021 at 14:43:51 And accurate NCERT Solutions for.
04.02.2021 at 20:28:26 Portion of the boat leaving the nose, engine cornerinside of a goal which this can.
04.02.2021 at 17:14:41 If I was going through most of the lot, I will additionally confess which.
04.02.2021 at 12:17:45 Information by balancing textual the forward fuel aboard and throttled back to the Boat Sailing Gif Explained 9 knot range, this.
04.02.2021 at 16:27:36 Questions or concerns, please contact don't squeeze if you're see.