Walter J. Klinar

Stanley H. Scher

A. I. Neihouse

The study is presented in terms of the following major problem areas: interpretation of results of spin-model research, analytical spin studies, techniques involved in obtaining measurements of various parameters in the spin, effectiveness of controls during spin and recoveries, influence of long noses, strakes, and canards on spin and recovery characteristics, and correlation of spin and recovery characteristics for recent airplane and model designs.

Status of Spin Research for Recent Airplane Designs

Irene G. Young

Free-body tests were made in the Langley spin tunnel to determine drag coefficients for 1.07-meter-diameter (3.5-foot) flat circular parachutes when restrained by wire frames in a series of shapes representing those that parachutes assume during the inflation process. Both high-porosity (stable) and low-porosity (unstable) parachutes were investigated. The results obtained should be applicable to inflation analyses for flat circular parachutes.

Stanley H. Scher

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