A Theoretical and Experimental Investigation of the Effects of Yaw on Pressures, Forces, and Moments During Seaplane Landings and Planing
Abstract
A theoretical investigation was made of the hydrodynamic forces and moments experienced during yawed water landings and planing of seaplanes of arbitrary constant cross section. Equations are developed for the side force, the rolling moment, the yawing moment, the pressure distribution, and the peak pressure. For the special case of the non-chine-immersed straight-sided wedge, these equations are such that the time histories of the side force and rolling and yawing moments can be expressed as families of generalized curves. Experimental measurements of the side force, the rolling and yawing moments, the pressure distribution, and the peak pressure, obtained during landing and planing tests made in the Langley impact basin with a float having an angle of dead rise of 22.5 deg, are presented and compared with the theoretical predictions. The landing tests covered yaw angles between 0 deg and 12 deg for trims of 3.2 deg, 6.3 deg, and 9.3 deg and the planing tests covered yaw angles of 6 deg and 9 deg for trims of 6.3 deg and 9.3 deg. In general, the experimental data appear to be in reasonable agreement with the corresponding theoretical predictions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1952
- Accession Number
- ADA376962
Entities
People
- Robert F. Smiley
Organizations
- National Aeronautics and Space Administration