Accession Number:

ADA027521

Title:

Hydrodynamic Equilibrium Conditions for AG(EH) Main Strut-Pod-Foil System Using Flap Incidence Control,

Descriptive Note:

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT

Personal Author(s):

• Coder,D. W.
• Wisler,B. B. , Jr

Report Date:

1976-06-01

Pagination or Media Count:

41.0

Abstract:

The power requirements for hydrofoil craft control systems has been a subject of recent concern as the U.S. Navy considers larger and larger craft. Four hydrofoil configurations were investigated theoretically to determine power requirements to control a hydrofoil ship similar to the AGEH in a random sea, and a pivoted foil with leading-edge tab was found to consume the least power. To determine whether this configuration would actually consume the least power, a 112-scale model was examined for equilibrium flapfoil angle conditions stable flying situations of the fully-wetted case. A passive control system comprised of mechanical linkages was used with the model to obtain steady-flow, fully-wetted conditions. The results of this experiment are discussed.

Descriptors:

• *POWER LEVELS
• *HYDROFOIL CRAFT
• MEASUREMENT
• CONTROL SYSTEMS
• TEST METHODS
• TEST EQUIPMENT
• MODEL TESTS
• DRAG
• LIFT
• HYDRODYNAMICS
• STRUTS
• PIVOTS
• HYDROFOILS
• LEADING EDGE FLAPS

Subject Categories:

• Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE