Eiusque vela cum sunt per altitudinem mediam mali pendentia, non potest habere navis celerem cursum, cum autem in summo cacumine antemnae subductae sunt, tunc vehementiore progreditur impetu, quod non proxime calcem mali, quod est loco centri, sed in summo longius et ab eo progressa recipiunt in se vela ventum.
Further, when the sails are only half-mast high, the ship cannot run swiftly; but when the yard-arms are drawn up to the tops of the masts, the ship sails with a more vehement course, because the sails take the wind, not near the foot of the mast (which is like a fulcrum), but at the mast-head from which the distance is greater.
final_alignments\Vitruvius_Architecture_Book_10.json