My engineering background is rock solid, my artistic ability is what it is. I have built boats using wood strips, stitch and glue techniques, and molded fiberglass. Some have been better than others, but they all floated without breaking! I select a building process assuming an inexperienced builder, having few tools, who wants the process to be simple and progress to be fast. Visit my site @ http://www.johnsboatstuff.com
(2*PI/T)^2*RADIUS*(ROLL ANGLE*PI/180)/32.2 ( units of G's)
In Marchaj's book, SEAWORTHINESS, THE FORGOTTEN FACTOR, chapter 4, "Boat Motions in a Seaway". The author presents a graph of roll acceleration ( in G's ) Vs four physiological states; Imperceptible, Tolerable, Threshold of Malaise, and Intolerable. Malaise starts at .1 G, Intolerable begins at .18 G. Spending much time under these levels of acceleration reduces physical effectiveness and decision making ability through sleep deprivation. The radius term assumes an off center berth located 1.5 feet inboard from the maximum beam. The roll angle is 10 degrees. G levels above .06 are considered undesirable for offshore cruising conditions. Several light weight, beamy designs have G levels above .4, definitely "intolerable" for any length of time.
My engineering background is rock solid, my artistic ability is what it is. I have built boats using wood strips, stitch and glue techniques, and molded fiberglass. Some have been better than others, but they all floated without breaking! I select a building process assuming an inexperienced builder, having few tools, who wants the process to be simple and progress to be fast. Visit my site @ http://www.johnsboatstuff.com