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Congratulations on the purchase of your new boat, and welcome into the sailing fraternity, Shane.
Sailing upwind will always involve a bit of heel, as your boat strikes a balance point between the force of the wind that wants to roll it onto its side, and the weight of the keel, called ballast, that wants to "right" your craft to a completely vertical position. (Those little dinghy sailors zipping around you must use their own bodyweight as the ballast to counter the heeling force, so you will see them always on the upwind side of their craft when sailing to weather; you have a big heavy keel to do the job). The closer to the wind you sail, the greater the heeling motion will be. This is quite normal, up to a point.
Most boats only sail well with up to ten degrees or so of heeling motion. Beyond that, the aero- and hydro-dynamic efficiency of your craft falls off for several reasons, and produces a few tell-tale symptoms, e.g., increased <em>weather helm</em> (the increased pull at the tiller/wheel that must be countered to remain on your desired course); the resultant tendency for your craft to <em>round up</em> into the wind, then bear away again, leaving a "scalloped" wake; a loss of speed; and a general feeling of loss of control over the boat. A sailing craft in this condition is said to be <em>overpowered</em>: the amount of driving force must be reduced to regain control and let the boat sail "on her feet" once more.
Most boats have sail controls that are designed to de-power the sail plan, among them the <em>boom vang</em> and <em>clew outhaul</em> which, when tightened, will flatten the mainsail, reducing the lift it generates; the <em>traveller</em>, which will allow the boom to be positioned so as to spill excess wind out of the sail; and a <em>reefing system</em> which will allow a reduction in the total sail area and therefore reduce drive.
When these controls are used properly and judiciously, control is regained and the symptom of excessive heel disappears. You also look as if you know what you''re doing, because, well, you do.
Since you''re a hands-on learner (as I am), I''d encourage you to stop by a local Barnes N'' Noble, and pick up one of the many excellent primers on sailing that will explain the basic physics involved and good sail handling techniques in detail (and with diagrams!). I cut my nautical teeth on Bob Bond''s <em>Handbook of Sailing</em>, but there are several other equally good, easy-to-read volumes on the shelf right next to it. I can''t think of a better investment for you at this point. Read, read, let the light go on, then get out there and put theory into practice.