Ivan Lo Cicero - Personal Trainer www.personalfitrainer.com

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J109 Going to Red on the way back to the Bar Buoy in the annual curtain raiser to the annual narrows series on Strangford lough. After getting off to a fast start in the strongest current GTR held the lead around the first 3 marks before Elixir took the lead on the run back to the Bar Buoy. The crew on GTR caught a few decent waves to close the gap, once they were on the stern of Elixir all the needed to do on the way home was stay close, with a minute per hour on the leading boat on Handicap they only needed to stick close to take the Bar Buoy Race on corrected time. The team at Bottom up Boats hope you enjoyed this short clip from our racing at the annual Narrows Regatta on Strangford Lough.

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Mit diesem Kettenzug-Setup und meinem Großbaum als Improvisation hebe ich den schweren Bootsmotor ganz alleine! Werkstatt überflüssig und hunderte Euro gespart. Komplettes Tutorial auf meinem Kanal Hafenkino Technik!

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UK Sailmakers uses very powerful 3-D CAD/CAM software for sail design, which create virtual 3-D molds that can be digitally sliced into two-dimensional panels that when joined back together re-create a full-size version of the designed mold. Thanks to powerful 3-D graphic renderings, designers can see how sail fit around the spreaders and shrouds as well as make sure the clew height and sheeting angles are right. They can also analyze how a main and genoa work together to make sure the boat stays balanced. What we are looking for is a sailplan and sail shapes that put the maximum driving force in precisely the right place to produce a perfectly balanced boat – and with the least amount of drag. Pat Considine, UK Sailmakers’ chief designer, goes a step further and uses Fluid Structural Interaction software, called FSI for short, as a virtual wind tunnel for refining sail designs and sail construction. FSI calculations are used to test proposed designs and cloth choices to make sure they are not built too strong (too heavy) or too weak (too light) for their expected loads. The FSI calculations will predict whether a design and construction will keep its shape properly as the rig bends, halyards are tightened and sheets are trimmed. Shown rotating in this video are two renderings of a Tripp 47 mainsail design. The side-by-side comparison shows the sail with no backstay tension and with max backstay trim. The FSI software allows Pat to rotate the two designs together to study their shape from any angle. In this case, Pat needed to be sure the draft would not move too far aft as the sail was flattened; likewise, he had to make sure the draft was not too far forward when the backstay was eased completely. The FSI program has made extremely accurate predictions of how specific sail designs will perform once made and trimmed in a variety of wind speeds. These tests ensure sails will meet the performance needs right out of the bag.

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