An Investigation of the Towing Stability of the HYTOW Body.
Abstract
A 9-foot long towed sonar housing referred to as the 'HYTOW', evidenced towing instability in two instances when towed at speeds near 30 knots from the hydrofoil patrol craft PCH-1. Towing experiments were conducted with a 1/5-scale model in the towing tanks at the David W. Taylor Naval Ship Research and Development Center to find a solution for the stability problem. An effective remedy consisted of flaring the body lines aft of the 70-percent length station into a truncated cylindrical shape that is terminated by a cylindrical cap having a diameter 50-percent of the maximum body diameter. It also was found that when so modified, the body towed more stably with the upper V-shaped horizontal stabilizer interchanged with the lower stabilizer and mounted inverted. With the recommended configuration changes the body towed stably (in model scale) to the full-scale equivalent speed of 45 knots. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1979
- Accession Number
- ADA082339
Entities
People
- David W Taylor
- Shelton M. Gay Jr.