Accession Number:

ADA167784

Title:

A Samara-Type Decelerator

Descriptive Note:

Final technical rept.

Corporate Author:

ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER PICATINNY ARSENAL NJ ARMAMENT ENGINEERING DIRECTORATE

Personal Author(s):

Report Date:

1986-03-01

Pagination or Media Count:

33.0

Abstract:

This report describes a simple decelerator which drives a submunition in a lunar motion while it descends vertically over a battlefield, scanning for armored targets. The decelerator consists of a single flexible fin with a weighted tip. The idea of using a flexible fin with a tip weight to generate a lunar scan motion was derived from the flight of maple seeds or samaras. Aerodynamic testing consisted of flying various configurations of the submunition in a vertical wind tunnel during which a nondimensional spin to velocity ratio of 0.110 and a drag coefficient of 3.21 based on the submunitions diameter were obtained. A simulation of the observed lunar motion of an axisymmetric model using a rolling body frame, six degree of freedom 6- DOF computer program, and estimates of the aerodynamic coefficients that could not be measured are presented. Keywords Samara Flexible fin Autogyro Decelerator and Maple seed.

Subject Categories:

  • Aerial Bombs

Distribution Statement:

APPROVED FOR PUBLIC RELEASE