Accession Number : AD0434142


Title :   EFFECTS OF LONGITUDINAL BOTTOM SPRAY STRIPS ON PLANING BOAT RESISTANCE


Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON DC


Personal Author(s) : Clement, Eugene P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/434142.pdf


Report Date : Feb 1964


Pagination or Media Count : 24


Abstract : Experiments were made to determine the effects on planing boat resistance of several configurations of longitudinal bottom spray strips. It was found that such strips extending aft from the bow about 70% of the hull length decreased the resistance somewhat at high speed but increased the resistance at low speed. The performance was noticeably improved by sharpening the edges of the spray strips. An experiment was also made with bottom spray strips extending only forward of the high-speed stagnation line. This arrangement gave a 6% reduction in resistance at high speed with no increase in resistance at low speed.


Descriptors :   *PLANING SURFACES , *SHIP HULLS , FLUID FLOW , HYDRODYNAMIC CONFIGURATIONS , SHIP MODELS , STAGNATION POINT , VELOCITY


Subject Categories : Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE