From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Describing plots related to the variation of efficiency with helix angle and coefficient of friction.
Identifier | ExFiles\Box 67\4\ scan0335 | |
Date | 13th July 1927 guessed | |
VARIATION OF EFFICIENCY WITH HELIX ANGLE AND COEFF. OF FRICTION. In fig V, tan(θ-Y) / tan θ is plotted for various values of θ, the helix angle, and Y, the angle of friction. Fig 6 shows the same formula plotted for small angles of θ to a larger scale. Fig 7 shows tan θ / tan(θ+Y) plotted, and is the same as the right hand side of fig V | ||