Boat Plans for the Foils of Your Boat As much as the hull plays an important role in boat building so does the foil. The foil of a boat is the centre board of the boat and it occupies at least four to five percent of the entire sail area. A completed boat should have all the parts properly designed and then fixed in their respective places to be able to be successful in the water. The measurement of the foil varies according to the oar type in different boats. In a lighter boat the rudder area is half the area of the center board, but if in the case of a heavy vehicle the area gets smaller. So you should plan your foil according to the weight of your boat. If you need proper stabilization for your boat you should check if the foil is fixed such that the rudder area is a maximum of ten percent of the underwater profile of the boat. But at the same time you could keep in mind that whatever the design of boat you are building the foil should have a maximum thickness at the starting point which is the front edge. If you are working on a racer boat you should see that the center board maintains a thickness of exactly twelve percent of the boat’s chord. Accordingly the radius of the leading edge should be kept at a sixth and the trailing edge five percent of the thickness. Bearing these tips in mind you should make perfect boat plans for the foils of your boat. Always remember like the hull, the foil is another most important part of your boat which keeps it afloat on the water. Great precautions should be taken to check the accuracy when placing the foil in the right place with the right thickness. If there is slight variation in the calculation of the thicknesses then you may have difficulty with maintaining a perfect buoyancy of the vessel. If you are a novice it is very well advised that you seek the suggestions of an expert boat builder. Another suggestion would be to download the 3D software for boat building from the internet. This would give you all the required information that you should get in building every part of your boat. If you spend a few dollars, may be less than $50 you will get that most magnificent boat that you have always been thinking of getting. After all safety is all that you need to give importance to when building a boat.