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).
Description of the operation of a rotor with fins and vanes within a fluid-filled differential gear system.
| Identifier | ExFiles\Box 147\4\ scan0160 | |
| Date | 13th January 1941 guessed | |
| differential gear to ensure the effective operation of the latter. The rotor comprises a wheel having a central boss with a radial web extending therefrom to the outer rim to form an annulus each side of said web. Each annulus is formed with fins or vanes radial to the axis of the rotor coincident with the radial fins or vanes of each complementary section of the fixed casing. The annulus of each complementary section is at the outer side of substantially semi-circular cross sections, each section abutting to form an internal annular peripheral rim or ridge in substantial alignment with the longitudinal axis of the rotor. Each boss of the complementary sections is correspondingly curved towards the internal edge or rim of said boss, whereby in operation the rotor revolves within the reservoir formed by the vaned annuluses. In operation assuming the engine is running the bevel pinions of the differential gear describe a planetary motion around the crown wheels; the crown wheel of the driven shaft in its inertia or resistance to motion causes the bevel pinions to also rotate on the arm and thereby drive the crown wheel of the rotor. The rotor initially slips through the oil in the reservoir but the radial vanes or fins thereon gradually deflect the oil by centrifugal force outwardly each side of the rotor. The deflected oil on striking the vanes or fins of the reservoir is retarded and deflected back against the sides of the rotor. Actually the oil is deflected radially by the vanes or fins of the rotor and returned between the fins or vanes of the reservoir to the boss of the rotor to be again outwardly deflected, this cycle of oil motion being -3- | ||