The humps happen when waves line up and add to increase your resistance. Gasoline is about 61 lbsgallon. Hull speed can be calculated by the following formula.
Hull speed can be calculated by the following formula.
You get multiple humps and hull speed is just one of those humps. For example say you have a displacement hull with a waterline length of 25 feet then the hull speed is 5 x 13 7 knots. Hull speed can be calculated by the following formula. Speed in Knots nautical MilesHr.