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).
Technical analysis discussing flywheel inertia and its effect on the velocity of rigidly attached gears.
| Identifier | ExFiles\Box 75\1\ scan0051 | |
| Date | 1st April 1918 | |
| -8- at the same time, whenever a tooth comes into contact with another tooth, the combined curves of which do not give a constant velocity, then the relative speed of the two flywheels is altered if they are rigidly attached to the gears. This was the point which I originally did not pay sufficient attention to and which is of course exaggerated by the use of comparatively small flywheels. One way of overcoming this disturbance would be by using very large flywheels, probably 10 or 20 times the inertia of our heavy engine flywheel; the driven flywheel would then have sufficient inertia to run in a contented manner, receiving perhaps only one very slight impetus per revolution from the highest point of the worst tooth in the wheel, or if every tooth is similarly bad the points of the teeth which would come into contact would be those which are highest, and the flywheel would not fall in speed appreciably between the time when the highest point of two consecutive teeth are in contact. It must be understood of course that there must be some slight retarding effect on the driven flywheel. The heavier the flywheel the greater can this retarding effort be. In the case of the flywheels we have been using the retardation due to the ball bearings appears to be sufficient. I think probably the best way to overcome this interchange of energy between the flywheels and the [Faint upside-down text at bottom right: ESP G (1912) 1S 289 (P.P) (1000) Wt 6037 4/18] | ||