Accession Number : AD0742752

Title :   Correlation of Resistance Test Results from Fixed- and Free-to-Trim Methods for a Dynamic-Lift Craft (Model 4667).

Descriptive Note : Research and development rept.,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD

Personal Author(s) : Hubble,Nadine

Report Date : APR 1972

Pagination or Media Count : 96

Abstract : Customary methods are discussed for determining the resistance characteristics in smooth water of hulls of planing and hydrofoil craft. Results are presented and comapred for a hull, with possible application to either type of craft, which has been tested by both the fixed-trim method, generally used for hydrofoil craft, and the free-to-trim method, generally used for planing craft. Recommendations are made for conducting future resistance tests of dynamic-lift craft, i.e., both planing and hydrofoil hulls, in the fixed-trim mode as well as for converting the data to the form of free-to-trim test data to facilitate general design studies for both types of craft. (Author)

Descriptors :   (*PLANING SURFACES, DRAG), (*HYDROFOILS, DRAG), HYDRODYNAMICS, EXPERIMENTAL DATA, MODEL BASINS, LIFT, MODEL TESTS

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE