The Elements of Aerofoil and Airscrew Theory, 1926, 1943

Document Type: Textbook (Technical).

Purpose: Training and Education.

Authority: Author Expertise.

Scope (from Preface): "The aim of aerofoil theory is to explain and to predict the force experienced by an aerofoil, and a satisfactory theory has been developed in recent years for the lift force in the ordinary working range below the critical angle and for that part of the drag force which is independent of the viscosity of the air. Considerable insight has also been obtained into the nature of the viscous drag and into the behaviour of an aerofoil at and above the critical angle, but the theory remains at present in an incomplete state. The problem of the airscrew is essentially a part of aerofoil theory, since the blades of an airscrew are aerofoils which describe helical paths, and a satisfactory theory of the propulsive airscrew has been developed by extending the fundamental principles of aerofoil theory.

The object of this book is to give an account of aerofoil and airscrew theory in a form suitable for students who do not possess a previous knowledge of hydrodynamics."

Contents (from Table of Contents): I. Introduction II. Bernoulli's Equation III. The Stream Function IV. Circulation and Vorticity V. The Velocity Potential and the Potential Function VI. The Transformation of a Circle into an Aerofoil VII. The Aerofoil in Two Dimensions VIII. Viscosity and Drag IX. The Basis of Aerofoil Theory X. The Aerofoil in Three Dimensions XI. The Monoplane Aerofoil XII. The Flow round and Aerofoil XIII. Biplane Aerofoils XIV. Wind Tunnel Interference on Aerofoils XV. The Airscrew: Momentum Theory XVI. The Airscrew: Blade Element Theory XVII. The Airscre: Wind Tunnel Interference Index