Accession Number : ADA019150

Title :   The Effect of a Shrouded Tail Extender on the Flight Characteristics of Bluff 500-Pound-Class Conformal Bombs.

Descriptive Note : Final rept.,

Corporate Author : DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD AVIATION AND SURFACE EFFECTS DEPT

Personal Author(s) : Hartley,Richard M.

Report Date : JUN 1975

Pagination or Media Count : 48

Abstract : A fineness-ratio two cylinder with modified box fins (called star fins) was proposed as a 500-pound class general purpose bomb suitable for conformal carriage on aircraft. Model and full-scale free-flight tests of the proposed shape showed that it was subject to pitch-yaw-roll interactions that developed into large-angle (45 degrees) coning motions. The configuration was modified by extending the fin assembly 1.3 diameters aft with a shroud and removing a front tending the fin assembly 1.3 diameters aft with a shroud and removing a front spoiler plate. The modified shape flew much more smoothly and with much less angular motion (generally 7 degrees or less). Both the original and modified shapes separated cleanly from the carriage aircraft (ejected by an Aero 7A rack from level flight near 3000 feet).

Descriptors :   *General purpose bombs, *Conformal structures, *Tail assemblies, Bomb fins, Aerodynamic drag, Separation, Bomb trajectories, Free fall weapons

Subject Categories : Aerial Bombs

Distribution Statement : APPROVED FOR PUBLIC RELEASE