Accession Number : AD0374500

Title :   ANALYTICAL AND AERODYNAMIC STUDIES OF ROTATING-BOMBLET MOTIONS.

Descriptive Note : Summary rept. 1 Jul 63-31 Jan 65 on Phases 1 and 2,

Corporate Author : ALPHA RESEARCH INC SANTA BARBARA CA

Personal Author(s) : Brunk, James E.

Report Date : 31 JAN 1965

Pagination or Media Count : 103

Abstract : Theoretical methods are developed for investigation of the flight characteristics of quasi-axi-symmetric autorotating glide-type bomblets. In addition to the glide and end-on flight modes, two circular motion modes are identified and investigated. Linear equations of motion are described for the glide mode and the solutions and stability criteria are discussed, including the relationship between mass asymmetry and the angular turning motion. Two-dimensional trajectory equations are derived and solved numerically for comparison with flight data and for evaluation of the transient flight path following launch. Six-degrees-of-freedom equations are presented in a form suitable for solution by a large digital computer. Available wind tunnel results for rotating bomblets are reviewed and pertinent data pertaining to performance, motion, and stability are correlated. Both theoretical and empirical methods for predicting spin performance are derived. Several new techniques for dynamic model testing are suggested. (Author)

Descriptors :   (*BOMBLETS, AERODYNAMIC CHARACTERISTICS), THEORY, MOTION, EQUATIONS OF MOTION, MATHEMATICAL ANALYSIS (U) FLIGHT PATHS, AUTOROTATION, BOMB TRAJECTORIES, NONPOWERED FLIGHT, COMPUTER PROGRAMMING, DIGITAL COMPUTERS, ROTATION, STABILITY, EXTERIOR BALLISTICS, SPINNING(MOTION), LIFT, DRAG, SPIN STABILIZATION, WIND TUNNEL MODELS, FREE FALL MISSILES, FREE FLIGHT TRAJECTORIES.

Subject Categories : Aerial Bombs
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE