Data from flight measurements of the meteorological factors related to the intensity of icing conditions are presented. The physical factors that establish the distribution of liquid water in clouds of various types are discussed and the results of the analysis are used to formulate certain rules for the forecasting of icing intensity. The problems of determining the range of values of the significant factors defining icing intensity for the purpose of the design of ice-protection equipment are discussed and tentative values are given.

A theoretical investigation of jet-transport climb techniques was made to determine the effect of variations in engine thrust and airspeed on sound-pressure levels heard by a ground observer.

Results indicate that cross-sectional shape and aspect ratio are minor factors compared with radius ratio in affecting the velocity pattern. Variation of Reynolds number within the range of the tests had no appreciable effect on the velocity distribution in curved ducts.

An analytical method is presented for obtaining turbulent temperature recovery factors for a thermally insulated surface in supersonic flow. The method is an extension of Squire's analysis for incompressible flow. The boundary layer velocity profile is represented by a power law and a similarity is postulated for squared-velocity the static-temperature-difference profiles.

This document is a compilation of formulas, tables, and curves for use in the analysis of supersonic flow.