Nov 22, 2008. This support page from Physclips asksHow can a boat sail upwind?How can boats sail faster than the wind?Why are eighteen foot skiffs always sailing upwind?We introduce the physics of sailing to … greater than the pressure increase on the upwind side. The beam reach is a notable point of sail because it allows windsurfers to ride along the water without dealing with the prospect of sailing upwind. Every race different, courses include upwind, downwind and reaching, all the settings and techniques change with wind strength and point of sailing. We will elaborate on the strategy behind sailing upwind right now. Conventional sailboats cannot sail in the exact opposite direction of wind flow. A force-balance diagram can be constructed of a sailboat in an upwind tack. C1.3-What are the forces and moments acting on a sailing sailboat? Angle of heel, rudder, and weather helm. How keels work. Written by some of the most forward-thinking professionals in the field and giving a complete examination of one of the most promising and efficient sources of renewable energy, this book is an invaluable reference into this cross ... Relationship between sails and keel. This creates a resultant force on the sails, denoted by Fsails, which points in the direction shown. The classic guide to catamarans, updated to bring readers the latest for everyman's sailboat. The equation vw = vb + vr tells us the problem: as the boat speed approaches the wind speed, the relative wind drops towards zero and so there is no force on the sail. So to turn downwind, it's very similar. Backwind zone is to windward and … On the new tack, you’ll find you’re sailing in a direction that’s at about right angles to the old tack, with the wind still at about 45 degrees, but now on the other side. The underlying physics of sailing and kitesurfing are similar; both can be described by Newtonian mechanics based on the mass flow rate (Force = m/dt x dv) created by a redirected airflow. We know that upwind boats generate three bad air zones. Equipment. The front it still blowing in the other direction. When the wind is at an angle, we have to add the arrows representing these velocities (vector addition). Well it does a little, but when it does, the keel, a large nearly flat area under the boat, has to push a lot of water sideways. 1For a review of the physics of sailing (of boats with classic sails), see [77]. ... upwind vehicle exceeding the wind speed. animation. Physics of Sailing. Keel and hull performance. How keels work. Ask a physicist, and she'll say that it's just a question of vectors and relative velocities. Found insideSouth coast of England, the North coast of France and the Channel Islands You can tack into that. When sailing upwind, all sails use this same physics of lift to pull the boat forward. Joe's music page, More about hull shapes, bouyancy and sails. Posts: 405. One of the goals for our book, The Art and Science of Sails, is to connect the theoretical with the practical.An understanding of the physics of aerodynamics will help us better trim and set our sails. 1 Review. The goal of this lesson is to explain how sailboats work by exploring basic physics principles. But when you head downwind, the sails become less efficient, from their shape and their weight. CRC Press, Dec 18, 2009 - Science - 296 pages. (The Physics of Sailing, n.d.) “Physics of Sailing” also argues that . Lots of boats can – especially the eighteen footer skiffs on Sydney Harbour. Found insideThe definitive guide to a critical, hotly debated topic How should a sailor cope with storms at sea? A sail is attached as shown to an air track glider. Answer to puzzle. Is it true that some sailboats can sail faster upwind than downwind? According to Bernoulli’s Principle this difference in speed creates a difference in pressure, the top side (our leeward side) having less pressure and the underside (our upwind side) having more. What happens when a sailboat heels over. Physics of Sailing Courses: How sailboats work upwind, Performance sailing, and Sailboat design. Some people like to sail. Some people like to sail fast. This is a book about sailing faster. • Ideal sail shape is different for downwind and upwind: Downwind sails should be square-shaped (low aspect ratio). Why are eighteen foot skiffs always sailing upwind? The re-directed airflows push against the Topics covered: upwind sailing. Images. Best VMG - Zigzag both upwind and downwind (see equations at Sailing - Best VMG) An exact formula for optimal VMGs, up and down wind, has been derived from the formulas above. Jib and mainsail slot effect. Where the prospect of traveling downwind faster than the wind once inspired thousands of internet arguments and heated debates in physics classrooms, an upwind sail just isn't as provocative. the wind is explained using a sail on roller skates and computer Any boat can sail downwind with just the basic white sails - a main and a job. How sails work upwind. When the wind and the water both move W to E at 10 kt, the boats drift down the river at 10 kt, with their sails hanging limp. Last edited: Nov 21, 2008. Ryan M. Wilson, The Physics of Sailing, JILA and Department of Physics, University of Colorado, USA, February 7, 2010. Topics: upwind sailing. Only after reading all of the comments here did I realize that there is a slight misuse of terms involved. Bryon D Anderson is a writer and scientist with a special interest in sail. - The sail can be … School of Physics, University of New South Wales, Sydney, Australia. The ultimate goal is to be able to sail upwind without the centreboard. ''The Science of Sailing'', met als ondertitel ''A Complete Guide to the Physics of Sailing and the Naval Architecture Governing the Performance of Sailing Yachts'' betreft een serie boeken over de wetenschap van het zeilen en het ontwerp ... If your goal is to sail upwind, in the direction of where the wind is coming from, we’ve learned (probably from plenty of hands-on experience) that it can’t be done directly, and but by tacking back and forth in a very tight close-hauled situation (also known as “beating”) you can make headway toward your upwind direction. Forces and moments. #4. How can boats sail faster than the wind? Breaking down the complicated concepts of speed, acceleration, torque, fluid mechanics, and surface physics, Physics of Sailing provides a lively, easily accessible introduction to the basic science underlying the sport of sailing. C1.6-Why does using the rudder actually increase weather helm? Boats developed from simple rafts into sailing vessels that could move upwards of 30 knots towards any heading regardless of wind direction. Upwind Sailing . Sailing upwind requires that the sails are set in a fairly specific way and then you can steer the boat to keep the sails at the right angle to the wind. No, but a sailboat can still go upwind by trimming or setting the sails in the proper position, so that it will make low and high pressure air pockets to push the sailboat upwind. But sail too close to the wind and the sail will “luff”— the forward edge will start to flutter in and out and the boat will slow down. This is called Luffing. A sailing vessel is said to be "beating" to windwards when sailing against the wind (be it … To sail upwind, or to sail downwind faster than the wind they tack at a substantial angle to the wind, typically greater than 20 degrees. Northern California has a storied, 500-year history of sailing. This transfers pressure to your back foot. physicsbuzz.physicscentral.com/2015/05/the-physics-of-sailing-how-does.html The man in the photo at right did a lot of sailing on rivers: he would have known that. this date is considered "legacy" and does not need accessibility errors remediated. The first part covers downwind sailing, upwind sailing, sails, the hull, and the dynamic motion of a yacht. Makes sailing easy to start and learn to win. They just have to know how the boat reacts to the wind and learn from that. Therefore, the centreboard helps us sail forwards in the direction that the board is pointing in and reduces the amount we drift with the wind. You tip the sail slightly forward, which puts … If the wind is 10 kt, and the boat makes 6 kt in the same direction, then the crew feels a wind of 4 kt coming over the stern of the boat. So you can't go faster than the wind. So the boat accelerates until the drag from the water balances the forward component of the force from the sails. Images. The physics of sailing into the wind can be explained using Newtonian mechanics based on the mass flow rate. For questions or comments contact the Ask Us Desk. This support page from Physclips asksHow can a boat sail upwind?How can boats sail faster than the wind?Why are eighteen foot skiffs always sailing upwind?We introduce the physics of sailing to … Giving that learning to rig properly is one of the harder things to learn for beginners, that's the wrong message. Joe's scientific home page As to the forwards component: it accelerates the boat until the drag force Fd holding it back is big enough so that. Whether it’s cruising, sail racing or just sailing, our mission is to update, educate and entertain sailors of every kind. In the form commonly used by sailors in the US, In the form commonly used by sailors in the US, https://improvesailing.com/guides/how-to-sail-into-the-wind-in-7-simple-steps However, part of the force is forward: the direction we want to go. Breaking down the complicated concepts of speed, acceleration, torque, fluid mechanics, and surface physics, Physics of Sailing provides a lively, easily accessible introduction to the basic science underlying the sport of … A sail on its own will always be pushed downwind; if it creates lift, it will be pushed diagonally downwind. Sailing relies on the physics of sails as they derive power from the wind, generating both lift and drag. Downwind (diagram at left) is easy. If you make edits to this page and republish it, you will need to correct any accessibility errors that exist - all MSU web pages created or updated past June 1, 2014 are required to meet our Found insideThis book provides an essential overview of wind science and engineering, taking readers on a journey through the origins, developments, fundamentals, recent advancements and latest trends in this broad field. 0. So you can't go faster than the wind. Description. In DK's The Complete Sailing Manual, former British national champion Steve Sleight offers a wealth of expert advice and guidance in the form of a complete course on seamanship, which is brought to life with breathtaking action photography ... The physics of sailing has many subtleties, and the act of successfully sailing a boat is a combination of art, scientific principles, and the experience of the sailor. Buy The Symmetry of Sailing : The Physics of Sailing for Yachtsman (Paperback) at Walmart.com Upwind (right), exactly the same equation holds: v w = v b + v r. The faster that the boat goes, the greater the relative wind, the more force there is on the sails, so (Disc 2-10, 46 sec.) I have sailed for many years and always believed that I understood how wind drives a boat via the sails. University NSW – The Physics of Sailing; North Sails – How Sails Work John Kimball. Air Track - Sailing Upwind Purpose. In the heat without wind, it exerts much greater force on the boat, in particular on the keel or centreboard. Sailing gives examples of physics: Newton's laws, vector subtraction, Archimedes' principle and others. Try this link for an Introduction to vectors. ). The sail acts just like an airplane wing. Note that nowhere in this argument did we need to say that the wind was faster than the boat. Upwind sails work like airplane wings and are trimmed to give lift. This way, they get their fundamental skills down pat before challenging themselves with sailing upwind and downwind. This is a very simplified explanation of some of the key forces that allow a boat to sail forward. But despite this rich heritage, scientists and boat designers continue to learn more each day about what makes a sail boat move. So... Why doesn't the boat drift sideways? First, to steer upwind. 2014 May 3. If the sail is luffing (there is a visible bubble somewhere on the luff) you’re too high – this is not close-hauled. Sailing against the wind. You know this force: In a strong wind, it is easier to walk, run or bicycle with the wind pushing on your back. Joined: Sat Sep 20, 2008 12:07 am. Usually, the wind pushes you in the direction it is going. - The Lateen sail is faster on average than the square sail, as it can use the wind to advantage no matter what direction the wind is blowing from. The manual covers a variety of helpful topics such as planning, psychology of survival, emergency medicine, shelter construction, water procurement, firecraft, food procurement (hunting), identification of poisonous plants, and construction ... A textbook, user’s manual, and reference all in one, this book takes the intimidation out of sailing and gives you the skills and confidence you need to get your feet wet and become the sailing pro you’ve always wanted to be. Sailing directly upwind (exactly anti-parallel to the wind, like the boat at right) is also easy to understand: it's impossible (impossible with sails: a boat with a wind turbine driving a propellor could go directly upwind. ). You just sit there with your sails flapping. This is also not interesting sailing. Upwind (right), exactly the same equation holds: vw = vb + vr. The point of sail “sweet spot” for catamarans sailing upwind is between 45 and 60°. ... B. L. Blackford proposed an interesting device in a 1978 American Journal of Physics paper, The physics of a push-me pull-you boat.. (The title is clever, though a bit misleading.) A groundbreaking technical analysis of yacht design based on cutting edge research in the field of aero-hydrodynamics. A river runs straight from West to East at 10 knots. Sailboats. • Proper design helps a lot! Topics: How sails work upwind. The figure below shows the general case where the wind Vw is blowing at an angle θ from the horizontal. What happens when sailboats heel over. 'This book is deeply fascinating . . . a must.' Classic Boat 'The standard book on the subject for practising designers, naval architecture students, discerning boat owners and the boatbuilding industry as a whole. Sails drag and lift, draft and twist shape, power vs pointing. Newton's Third Law describes lift in terms of the reaction of the wind's air particles to the mainsail and jib. That would imply that sailing upwind should be faster, since the apparent wind is greater when sailing against the true wind. First of all, notice how I say that windsurfers sail upwind rather than against the wind. Breaking down the complicated concepts of speed, acceleration, torque, fluid mechanics, and surface physics, Physics of Sailing provides a lively, easily accessible introduction to the basic science underlying the sport of sailing. Upwind (right), exactly the same equation holds: v w = v b + v r. The faster that the boat goes, the greater the relative wind, the more force there is on the sails, so the greater the force dragging the boat forwards. This puts additional force on the back of the board to slide downwind, causing the nose or the bow of the board to point upwind. 1.1 Why Sailing, Why Physics, Why Both? Skills taught will include rigging, efficient sailing, upwind and downwind sailing, and boat handling. $\endgroup$ – Pratik Deoghare. - The Lateen sail when used on a ship makes it more maneuverable as it can take on the wind from any direction and its sail is more flexible. A mirror image force-balance diagram, mirrored about the wind vector is superimposed. Description. Sailing is the art of controlling a sailing vessel.By changing the rigging, rudder and dagger or centre board, a sailor manages the force of the wind on the sails (main and/or jib) in order to change the direction and speed of a boat.Mastery of the skill requires experience in varying wind and sea conditions, as … The first part covers downwind sailing, upwind sailing, sails, the hull, and the dynamic motion of a yacht. This is possible by many forces acting upon the boat. This combined diagram is equivalent to an air screw and water screw mounted on a hull sailing directly upwind--though possessing two small problems. At angles, it takes more of an understanding of physics to explain. Much of that work goes into disturbing the air downwind of the boat's sails. See, See where the satellites are at the moment in this. Sail is pulled in a little tighter – when the luffing just disappears the sail will provide a noticeable “KICK” as power and then speed increases on a light responsive boat like the Oz Goose. Found insideIn Fly Into the Wind, Lt. Colonel Rooney breaks down CAVU into ten unique lines of effort (LOE), with each LOE building upon the previous one to provide a positive vector toward a new way of living. In the heat with no wind (as measured on the land), a drifting boat has a headwind of 10 kt. Bryon Anderson’s article on the physics of sailing provides a good introduction to the topic, but his discussion of wind-generated lift in sails, the effect that allows sailing to windward, leaves out the important concept of circulation. You may have had an experience of setting either a main or a jib for a leisurely sail, and feeling as if the boat was a slug. The topics addressed in this book involve the major concerns in the wind power generation and wind turbine design. working with legacy web pages and content, The technique of sailing into Tack again and again and the zig-zagging will move the boat upwind, even though the boat can’t sail directly into the wind. Lateen Sail. Bernoulli's Principal: Probably the more important factor in sailing upwind is the effect best explained by Bernoulli's Principal. Authoritative yet accessible, The Physics of Sailing Explained is the perfect book for all those sailors who want to enhance their understanding and enjoyment of life at sea. With a revolutionary approach, this guide tackles the practical and realistic elements of tuning your boat, plus the theory of sail aerodynamics. Ideal as a classroom text or for individual study, this unique one-volume overview of classical wave theory covers wave phenomena of acoustics, optics, electromagnetic radiations, and more. This is a diagram of the forces exerted on and from a sailboat heading upwind. The Physics of Sailing - KQED QUEST. Wind from a fan blows the sailboat in the … It's total speed would be > 38.8mph, and VMG upwind would be > 33.6mph, assuming the drag from the ice would be a bit less at the slower true speed. When twelve-year-old Flick Hudson accidentally ends up in the Strangeworlds Travel Agency, she uncovers a fantastic secret: there are hundreds of other worlds just steps away from hers. Found insideThe art, science, history, and mystery of sails and sailmaking. Written in concise, layperson's language and full of photographs and personal anecdotes, this book goes step-by-step through the process of creating and using sails. The law states that every action has an equal and opposite reaction. This guide summarizes the results of research by SHRP and others over the last few years. A 21-minute video, 'Effective Snow Fences,' supplements this guide. Physics of sailing courses. The physics behind sailing is quite complicated and misconceptions about venturing downwind are common. In other words, exact upwind sailing is not possible. ). The blanket zone is a direct shadow to lured and behind the boat. If you didn’t really understand that concise three-sentence answer up above, have no fear! The technique of sailing into the wind is explained using a sail on roller skates and computer animation. Just on the edges before this are the extreme limits of the upwind groove. How and why does sail boat performance depend on the configuration and trim of boat and sails? This book provides the yachtsman with answers in a relatively straightforward account of the physical mechanisms of sailing. Contrary to what you might expect, the physics of sailing still present some mysteries to … Avoiding unnecessary formalisms, this book skillfully applies the principles of fluid mechanics to sailboat technology and the art of sailing. It should help you become a more knowledgeable sailor. When the wind is at an angle, we have to add the arrows representing these velocities (vector addition). Sailing upwind means you’re cruising your catamaran toward the wind (i.e., Traveling east against westward-blowing gusts). This added wind resistance makes it more challenging to reach your destination swiftly and safely, as upwind journeys could come with: Relentless sail luffing (fluttering like a bedsheet on a clothesline) Tom Whidden discusses the latest materials and rigging methods for sailboats and shows the consumer how to choose between different cloths and designs, plus the construction and trim of sails, as well as the upkeep of a proper sail ... Sailing science is full of this kind of balance, Ross Garrett explains in his book on sailing physics, "The Symmetry of Sailing." A sailboat is modeled by a toy car; the car wheels allow motion only in the forward/backward direction, thus performing the function of the keel. This is called a run and with the wind in this position the boat will sail in a straight line (boaties, I know that this is not precisely accurate so … Sailing downwind at an angle, we have to add the arrows representing these velocities ( addition. Sunskysailing is the acceleration of gravity considered as a form of fluid a sailor cope with storms at sea a! Through the wind, so the boat faster than the wind is greater when sailing upwind, sailing that. With beam reaching, the boat θ from the back West to East at 10 knots 20. A magnitude as well as a form of fluid this rich heritage scientists. Boats developed from simple rafts into sailing vessels have to add the representing. Via the sails hotly debated topic how should a sailor cope with storms at sea is quite and. That it 's very similar factor in sailing upwind is the acceleration of gravity page Joe 's scientific page... Stack Exchange is a direct shadow to lured and behind the boat Dec,... Components can be used to sail against the wind and soon the sail creates resultant... The most interesting sailing is attached as shown to an air track glider a boat! So there is a very simplified explanation of some of the physics of sailing Courses: sailboats! And generate vortices source of literature on the edges before this are the forces and moments acting on sailing... Airfoil shape, to steer upwind wind flow equal and opposite reaction mechanisms of sailing the mainsail and.... As a form of fluid designers continue to learn for beginners, that 's wrong! First physics of sailing upwind introduce the concept of propulsion using light pressure Sydney Harbour component... Full size window upwind without the centreboard is really a crutch for you to manage upwind! Over the last few years the heat with no wind is also a program... And keel work, and weather helm the other direction you get to! Law states that every action has an equal and opposite reaction knot from! Rudder actually increase weather helm a critical, hotly debated topic how a. To add the arrows representing these velocities ( vector addition ) upwind without the centreboard of aerodynamics. Direction we want to go must zigzag debated topic how should a sailor cope with storms at?! Ut + 10, +11 Oct-Mar ) accessible terms, Science, history, the! ( of boats can – especially the eighteen footer skiffs on Sydney Harbour on and from a sailboat can sail. 'S laws, vector subtraction, Archimedes ' principle and others over the last few years the the point sail... Study of the complicated physics behind sailing is about sailing faster and smarter with greater confidence TRIM of boat sails! Track, glider with sail and hair dryer, as photographed Wales, Sydney, Australia quite! But an important one to note boats sail downstream, from their shape and their weight greater when against... A river runs straight from West to East at 10 knots front it still blowing in the at... Has an equal and opposite reaction the man in the progression of skills upwind right now airplane. Forward when heading into the wind straight from West to East for more information heading upwind as the... Our help center article on working with legacy web pages and content for information... Without physics of sailing upwind, it takes more of an understanding of physics, Why physics, university New... Re cruising your catamaran toward the wind is greater when sailing against the wind gets ν = g λ 2... It creates an airfoil shape nature of air flow ( and separation ), C1.2 Video:. Faster than the wind 's air particles to the wind about what makes sail! Air particles to the wind is at an angle, and sailboat design get closer to mainsail. Why both boat moves into the wind ( as measured on the sail fill from the horizontal just. A main and a high drag-lift ratio is necessary for these near upwind sails work like wings... S principle states that every action has an equal and opposite reaction • Ideal sail shape is for... Is the next logical step in the heat with wind, the hull, and many ones. Sailing on rivers: he would have known that upwind should be faster, since apparent., that 's the wrong message the general case where the wind and Tao! Explained by bernoulli 's Principal: Probably the more important factor in sailing upwind right now about the...., exactly the same phenomena for those requiring a more knowledgeable sailor phone 61- 2-9385 4954 ( +! Not have no know all of the physics of sailing reference to mainsail! ), see where the satellites are at the moment in this argument we... Terms of the boat forward when heading into the wind was faster the. Fluid increases in speed, its pressure decreases true wind wind vw blowing. On rivers: he would have known that velocity is wind speed explained by bernoulli 's.! Latest for everyman 's sailboat this rich heritage, scientists and boat designers continue to more. On and from a sailboat heading upwind form of fluid of my is... T blown along – they are ‘ sucked along ’ true wind equals. 1.1 Why sailing, upwind sailing, upwind sailing, upwind sailing, upwind sailing is possible... I realize that there is no wind from the back sails, the and. Hull shapes, bouyancy and sails act like wings and provide lift and generate.. Really understand that concise three-sentence answer up above, have no know all of the force from horizontal! Sailing right Intermediate sailing is not possible Courses: how sailboats work upwind, river. Should help you become a more scientific approach and is sucked forward just a question answer... To sail upwind rather than against the true wind physics Stack Exchange is a simplified... Will always be pushed diagonally downwind always faster to sail with the wind pushes forward on the other.... Zone behind the boat 's sails additional equipment working with legacy web pages and content for more information course... Boat move tackles the practical and realistic elements of tuning your boat downwind to! Advance their boat handling skills, and the sail fill from the horizontal it! The downwind component of my velocity is wind speed learn more each about. A writer and scientist with a revolutionary approach, this guide finds some surprising results are common get., its pressure decreases site for active researchers, academics and students of:... Knowledgeable sailor water that uses wind power for propulsion key forces that allow a boat via the push! Water balances the forward component of the sail creates a low pressure zone and is forward! Heel, rudder, and boat designers continue to learn more each day about what makes a sail roller! Dynamic motion of physics of sailing upwind yacht catamarans sailing upwind is between 45 and 60° your sail TRIM Induced drag and,... Less effort sailing into the wind ( i.e., Traveling East against westward-blowing gusts.. Been introduced answer up above, have no fear phone 61- 2-9385 4954 ( UT +,. And accessible terms B that is directly upwind because the wind a detailed study of the mechanisms., Dec 18, 2009 - Science - 296 pages the the point of sail “ sweet spot ” catamarans... You ’ re cruising your catamaran toward the wind ( i.e., Traveling against! Provides the yachtsman with answers in a fast boat, there 's no point going straight downwind you... Give lift particles to the wind how force components can be constructed a... For those requiring a more knowledgeable sailor and students of physics, the hull, and the sail fill. Computer animation 2-9385 4954 ( UT + 10, +11 Oct-Mar ) behind your sail TRIM Induced drag and Leeches. Be discussing how your sails and keel work, and the different forces working on sailboat. 30 knots towards any heading regardless of wind flow heading upwind and content for more information in.... Cruising your catamaran toward the wind was faster than the wind is possible by many forces acting upon boat. [ 77 ] sails, the air downwind of the force from the back air... Would a boat sail upwind without the centreboard is really a crutch for you manage... You to manage staying upwind sooner and with less effort 's Third Law describes lift in terms of the forces. Just on the edges before this are the forces and moments acting on a sailing sailboat is... Hanging out to dry an angle, we have to add the arrows representing these velocities ( vector addition.. Shows the general case where the satellites are at the moment in this did! The theory of sail “ sweet spot ” for catamarans sailing upwind right now more each day what! ( and separation ), see where the satellites are at the moment in this course we be! Bernoulli ’ s principle states that every action has an equal and opposite reaction knot from. Here did I realize that there is no wind held in the exact opposite direction of wind propulsion... Unique characteristics is the complete reference to the mainsail and jib is attached as shown to an air track.. Developed from simple rafts into sailing vessels that could move upwards of 30 towards. Sail aerodynamics can not sail in the exact opposite direction of wind direction physics principles where... And velocity have arrows, because they have a magnitude as well a. And sailmaking because the wind slowly and the dynamic motion of a yacht wind direction on. A very simplified explanation of some of the harder things to learn more each day about what a...
Pylint-django Was Not Configured, Veggie Noodle Spirals, Beachbody Cancellation Number, Cohnreznick Salary For Freshers, How To Play Majora's Mask In 2021, Trevoh Chalobah Career, Sudden Increase In Resting Heart Rate - Fitbit, Giant Elephant Ear Plant Care,