Underwater Characteristics of Projectile 61.04

Abstract

This report covers the underwater performance characteristics of a torpedo shape of the 61 series, designated as Model 61.04 This shape is a modification of Model 61.01, the original form of the 6i series, the tail fin span being reduced and short runners added to the forward part of the cylindrical section and on the fins. All tests were made on models without propellers. The characteristics of Projectile 61.04 are compared with those of Projectile 61.01, for yaw (or pitch) angles up to i2 degrees, and for rudder settings up to 20 degrees. Tests were made, at neutral rudder only, on Projectile 61.04 with the short runners removed from the body and tail fins, to measure the effect of the runners. These tests were authorized by Dr E H Colpitts, Chief of Section 6.1, NDRC, in his letter of October 8 , 1943.