This video is all about weather vanes or wind vanes and explains how they work in a simple way. Invented in 1961 by Blondie Hasler—a major proponent of the modern Chinese junk rig and one of the leading originators of the OSTAR race—the servo-pendulum vane gear was a significant advancement in self-steering for one major reason: it required no modification to an existing boat’s rudder and thus allowed yachts with counter sterns or fully submerged rudders to be self-steered.
The Franklin Institute has a great series of how-to projects related to weather , including a simple plan to Make Your Own Weathervane It would be ideal as an individual or group science project, as the basic supplies are easy to obtain – you’ll need a piece of dowelling, discarded ruler, aluminum pie plate, a metal washer and wire, plus some simple tools.
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In many cases, some of this is unavoidable, so consult with the manufacturer to determine if the obstruction is significant enough to cause an issue with the vane getting clear air to properly steer by. Many vanes stick up far enough to get above deck and cockpit objects, so make sure there is nothing above the vane such as dinghy davits or mizzen sails to obstruct the full range of the vane’s motion.
Also, wind speed changes with height, so engineers use anemometers to determine the best height to place the turbine. Some wind vanes have directions marked on the rod of the vane, which helps the interpreter determine the direction from which the wind is blowing. Many parts of the linkage between the wind vane and servo rudder are the same as the later Aries. This makeshift wind vane came to be known as a telltale and is still used today by sailors. Yet, if freezing rain is occuring the wind vane may get frozen in place until the ice melts.
Wind alarms also monitor conditions near industrial cranes, exposed roofs or other situations in which high winds can be hazardous. Under normal circumstances, it seems to make sense to use the rudder that was designed for the boat instead of a one-size-fits-all auxiliary rudder. NOTE: The direction of the wind is defined as the direction from which the wind is coming.
They also learn about different types of anemometers, real-world applications, and how wind speed information helps engineers decide where to place wind turbines. However – two years ago a fellow racer hit the upper part of installation and broke it. I got a new one from Canada, but in transportation the turret (the top part where the wind vane is working) was damaged. You may want to make an anemometer to show how you measure the speed of the wind.
An advantage of wind vane controlled steering gears over electronic types, is that on a long passage once the sails are set, the wind vane will follow any small changes in wind direction. With the locking pin removed or the clamp released the vane is free to ‘weathercock’ into the wind when the system is not in use. This is not an issue if you build a wind vane for your own usage, but if you intend to use this system to commercialize a product, make inquiries beforehand. If the vane is made of metal, you can weld these brackets, and if it is made of wood, you can use screws to fix them.
The height of the wind vane pole will depend on where you intend to fix it. You can start by marking the area on the rod where you would mount the vane. The South Wind dripped water from his beard, and would spread fogs that the sailors would get lost in Zephyr, the West Wind. However, a wind vane gear is best solution for a sailing boat and not just because of the power issue.
In the case of a simple vertically rotating vane, as the boat turns clockwise away from the wind direction the vane will rotate in and anti clockwise direction relative to the boat. Measure the wind speed by counting the number of times the anemometer spins around in a minute (rotational rate). You now know how to build the tools necessary to measure the speed and the direction of the wind with the help of Yoctopuce modules.
In fact, it is quite simple to make on your own; all you need are a few things-most of which are readily available at homes-like a drinking straw, pencil with an eraser attached to it, card paper, straight pin, and a box or a paper cup. If the wind shift is small this is a drag, as you must either shift course or trim sails to keep the boat sailing its best. Most wind vanes can, however, be rigged to drive the main helm through a series of blocks and rope coil around a drum mounted on the wheel. If you have access to a blacktop area, mark the compass points in chalk to make it easier for the students to read the wind direction.
For example, anemometers are used to determine the how much airflow is entering or exiting mines, to make certain that miners have adequate ventilation and have enough air to breathe in the underground caves. A Ship with an Arrow in Michigan, USA is a Wind Vane that stands 48 feet tall with its arrow measuring 26 feet long- the largest Ship Weathervane on the planet.
After I mounted the wind cups assembly to the spline shaft, I cut a hole in an old moon hubcap and mounted it over the thro-out bearing to keep out moisture. Shorthanded this means that I could make tea, go to the bathroom or do navigating down below, while the winds come howling over the mountains and hitting the boat at new and unappreciated angels. Lots of times you don’t bother and instead just leave the boat limping a bit on the assumption the wind will soon shift back. Test the wind vane by blowing on the arrow, making sure that it spins freely around the straight pin.
For example, when you face into the wind, the direction you are looking is the direction of the wind. I even made dinner while heading out a rather narrow fjord, just following the motions of the boat on the electronic charts on the computer, sticking my head out into the wind and rain looking out for other boats now and then. The wind vane experiment really did work and she got full credit for the project.
A wind vane is a steerable device, with a shape designed so that it moves spontaneously into the wind’s eye. The shape of the weather vane can vary from a simple arrow, to more ornate and decorative figures. Enjoy viewing this Wind Vane facts for kids video and significantly improve your little ones’ interest to discover fascinating fun facts about Wind Vane. That compass heading works particularly well when you are swinging at anchor and want to monitor the wind direction.
However, if the sailor has a very well equipped yacht, with redundant and ample power supplies, or if he or she expects to motor as much or more than sail, during which electricity is provided by the engine’s operation, an electronic autopilot may make more sense. Make a series of 12 hour weather forecasts based on your barometric readings and compare your predictions with those of you local newspaper or radio/TV station. To convert to wind speed in centimeters (or inches) per second, use the equation below with the diameter of the anemometer in centimeters (or inches). The primary disadvantage of electric mode is that the vane cannot follow wind shifts.
For safety and efficiency, railroads install wind alarms that report route conditions because high wind gusts cause loss of train power and derailments, and even blow over empty freight cars. However when going to windward an offset vane will be disturbed by the air leaving the rear of the mainsail more on one tack than on the other. Wind vanes on the other hand will slavishly follow any wind shifts, a good one will often do it better than most humans and do it for hour after hour without tiring. Engineering Your Playground: Use the class data to determine the wind patterns of the playground (or area that you used in this activity).
When wind rotates the shaft and the magnet swings over 1 of 8 switches placed on points of the compass, one or two Light Emitting Diodes (LED) mounted in a small box inside my house lights up and tells me which way the wind is blowing. With the boat back on its correct heading the vane and thus the rudder will return to its original position. To prevent the measures from being corrupted in case of a not quite horizontal installation of the wind vane, we use metallic washers to ballast the arrow. Place the wind vane arrow on top of your index fingers, then move your hands together until they touch.
On the vertical-vane servo-pendulum invented by Blondie Hasler, the vertical wind vane is connected to the servo blade. If the body of the weathervane is not allowed to move freely, its reaction to changes in wind direction and speed will be too slow. I used a disc of a Tufnol like material which was relatively easy to shape yet is hard wearing, I have heard of someone who used a bicycle drive cog to good effect.
Nail the wooden block to wooden surfaces, tie the vane with wire onto fence posts, or come up with your own method of attachment. Most Aries, Monitor, Norvane, Cape Horn, Fleming, Hasler and others have paddles in the water driven by a wind vane that is adjusted to the apparent wind, sail trim and course. The source of the wind may not have been fully understood, but people of ancient cultures understood how important the wind is a predictor of the weather. The angle Salt” is approaching the wind is as a matter of fact so steady I had to check if the Windex was stuck.