Boating NZ : FREE TO READ March 2014
S peed and control are mutually exclusive” is Rule One of five maxims that can be used to summarise the art of yacht design. In essence it means that, generally, as you go faster the degree of control is reduced and anything you do design-wise – or trim/ configuration wise – to regain control will cost you speed. This is equally true of sailing yachts and powerboats. The other rules are: two, you don’t get ’owt for nowt – or where there’s lift there’s drag; three, beauty is in the eye of the chequebook holder; four, Isaac Newton always wins, Archimedes and Bernouli just comply; and five, compromise management is the name of the game. These will be referred to below. Planing occurs when the speed of the boat allows the bottom panels FUTURE CONCEPTS CHRISTIAN STIMSON 48 A range of performance prediction software dines on deadrise angle, beam at chine and longitudinal centre of gravity to help designers gain lift, control and speed. “ TO THE HULL POWER Running flat, with longer wetted length and reduced angle of attack on the chines. 48 Boating New Zealand March 2014 Feature__future concepts_March14.indd 48 19/02/2014 3:10:15 p.m.
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