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).
Graph plotting efficiency against helix angle for various coefficients of friction under joggle conditions.
Identifier | ExFiles\Box 67\4\ scan0337 | |
Date | 13th July 1927 guessed | |
FIG. VI JOGGLE CONDITIONS. EFFICIENCY % μ = .050 μ = .100 μ = .150 HELIX ANGLE θ. | ||