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).
Modifications for the helical 2nd speed gearbox of the Phantom model.
| Identifier | ExFiles\Box 15\5\ Scan366 | |
| Date | 11th January 1933 | |
| To. BY.{R.W. Bailey - Chief Engineer} from Hdy.{William Hardy} c. to AG. Wor.{Arthur Wormald - General Works Manager} HS.{Lord Ernest Hives - Chair} EA. DA.{Bernard Day - Chassis Design} Y7310. HDY{William Hardy}14/N.11.1.33. Helical 2nd.Speed - Phantom. N.Sch.3631 herewith shows the helical 2nd. speed for the Phantom. Existing gearbox casings can be used with slight machining for clearance but we suggest slight pattern alterations to avoid some of the machining. We ask for a special bearing for the layshaft which is the existing bearing reduced in width by 3 m/m.{Mr Moon / Mr Moore} We show an alternative coupling in which the torque is better distributed along the splines and greater resistance to rocking attained thereby. Hdy.{William Hardy} | ||