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).
Notes and calculations on riding quality, showing various cases of oscillation and spring dynamics.
Identifier | ExFiles\Box 43\2\ Scan220 | |
Date | 29th August 1927 | |
RIDING QUALITY DRAWING NO. A10949 SEE ALSO THE FOLLOWING OPERATION DRAWINGS Case I DEFLECTION d SPRING STIFFNESS S M TIME OF SWING = 2π√(M/S) Case II DEFLECTION d 2M x SPRING STIFFNESS S TIME OF SWING (NEGLECTING ANGULARITY EFFECTS) = 2π√(DISPLACEMENT/ACCELERATION) = 2π√(x / (2xS/2M)) = 2π√(M/2S) I.E. SECOND FREQUENCY IS √2 TIMES AS FAST (1.414 TIMES) AS FIRST FREQUENCY, THOUGH SPRING STIFFNESS IS THE SAME, AND SPRING DEFLECTION IS THE SAME. Case III C.G. a b w₁ W w₂ w₁ = W x b / (a+b) w₂ = W x a / (a+b) IF K² = a x b, THIS IS EQUIVALENT TO: Mass W₁/g Mass W₂/g Case IV TYPES OF OSCILLATION CENTRE OF OSCILLATION "BOUNCING" OR REAR SPRING OSCILLATION CENTRE OF OSCILLATION "PITCHING" OR FRONT SPRING OSCILLATION DRAWN BY: AF DATE: 8-29-27 TITLE: NOTES ON RIDING QUALITY DRAWING NO. A10949 ROLLS-ROYCE OF AMERICA, INC. | ||