Accession Number : AD0777733

Title :   Seakeeping Characteristics of Four Members of Hydrofoil Hull Series 65.

Descriptive Note : Final rept.,

Corporate Author : STEVENS INST OF TECH HOBOKEN N J DAVIDSON LAB

Personal Author(s) : Van Dyck,R. L.

Report Date : APR 1973

Pagination or Media Count : 58

Abstract : A systematic study of the effects of hull-hydrofoil arrangement, hull length-beam ratio, sea state, loading, speed, longitudinal center of gravity location and simulated hydrofoil damping was made on the rough-water performance of a series of hull forms suitable for hydrofoil craft operation. Measurements of resistance, heave and pitch motions, and impact accelerations at two locations serve as a basis for comparison. From the particular range of parameters investigated it appears that: hulls appropriate to an airplane hydrofoil arrangement have better seakeeping characteristics than those intended for a canard layout; added resistance is shown to be a linear function of load, sea-state and speed; impatt loads increase with length-beam and the square of the speed and decrease with hull loading; motions are reduced at high length-beam ratio and are insensitive to load; the response of hydrofoil hulls is confirmed to be non-linear. (Author)

Descriptors :   *Hydrofoil craft, *Ship hulls, *Seakeeping, Hulls(Marine), Marine engineering, Hydrofoils, Sea states, Hydrodynamics, Ship models

Subject Categories : Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE