APPARENT SLIP AND TACTICAL DIAMETERS FROM TRIALS OF A GERMAN 'E' BOAT,

Abstract

Tactical diameters were measured on 360-degree turns using hard-right and hard-left rudder angles at 1275 and 1350 engine RPM with the effect rudders at amidships, and at 1350 and 1480 engine RPM with the effect rudders set at 17 1/2 degrees, trailing edges outboard. Tactical diameters were not obtained at 1200 engine RPM with the effect rudders at amidships due to a casualty to the camera equipment which made triangulation impossible. The results are summarized. Curves of propeller RPM and apparent slip versus speed are given. The lack of complete RPM data has necessitated the fairing of the curves of runs without effect rudders between the available spots.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1948
Accession Number
AD0649193

Entities

People

  • W. C. Sadler

Tags

DTIC Thesaurus Topics

  • Casualties
  • Diameters
  • Flight Instruments
  • Ground Position Indicators
  • Instrumentation
  • Machines
  • Measuring Instruments
  • Mechanical Equipment
  • Navigational Equipment
  • Outboard
  • Positioning Devices (Machinery)
  • Propellers
  • Trailing Edges
  • Triangulation

Readers

  • Marine Hydrodynamics
  • Systems Analysis and Design
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).