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Report presenting the initial development of a technique for the qualitative study of the stability and control characteristics of a free, self-propelled, dynamic submarine model. Two types of control systems were evaluated. Results regarding the qualitative analysis of the control system, dive paths, equations of motion, and comparison with experimental paths are provided.

Report presenting testing of a configuration with a body of fineness ratio 16.6, an unswept horizontal tail of aspect ratio 2.7, and a highly swept vertical tail, which were aeropulsed continuously in pitch during free flight with and without a sustainer rocket motor operating. Results regarding the pitching response, cross coupling, sustainer motor, angle of attack at zero normal force and tail flip, model aerodynamic center, induced jet effect are provided.

Report presenting tests conducted on models with 45 degree sweptback wings with varying degrees of flexibility to determine the effective lift-curve slopes in order to evaluate the usefulness of a general method for predicting effective lift ratio by a comparison of predicted values with test results.

Report presenting an investigation with the objective of eliminating destabilizing changes of pitching moment through the use of wing modifications for two airplane models with triangular wings of aspect ratio 2 and 3. Models were tested with horizontal tails above the extended wing chord plane and with the tail off.

Report presenting the initial development of a technique for the qualitative study of the stability and control characteristics of a free, self-propelled dynamic submarine model in Langley tank no. 1. Two types of control systems were evaluated, but only one provided satisfactory results at the desired test speeds. Results regarding the qualitative analysis of the control systems, dive paths, equations of motion, and comparison with experimental paths are provided.

Report issued by the Argonne National Laboratory covering the quarterly report from the Reactor Engineering Division. A summary of reactor programs, designs, development, and experiments are presented. This report includes tables, illustrations, and photographs.

Summary of miscellaneous updates related to the project. This includes information on the following: the declassification of a relevant paper, solubility measurements, static corrosion tests, various other tests involving bismuth, magnesium, uranium, protactinium, and thorium.