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).
Design note discussing variations to the frame and springs for the B.50 chassis.
| Identifier | ExFiles\Box 112\2\ scan0096 | |
| Date | 26th January 1938 | |
| GRY{Shadwell Grylls} Note type variation Rm{William Robotham - Chief Engineer} To Da.{Bernard Day - Chassis Design}. from Ev.{Ivan Evernden - coachwork} C. to Ey.. Rm.{William Robotham - Chief Engineer} 1044 Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}4/N.26.1.38. ---827--- Frame Transmission & Springs - B.50. On PD.93 herewith we shew the frame, transmission and springs for B.50. to enable the first chassis 1.B.50 to be put in hand. At the same time we have investigated all places where this chassis will differ from the B.3. so as to be able to design a body. Frame. Six inches is added to the centre of the side channels and the frame cross. There is no other change. Rm{William Robotham - Chief Engineer}/Les has already approached the makers re using B.3. dies. The gauge of the frame should be, we suggest: Side channel .104 Frame cross .104 Gussets of front arms .104 The rest of the frame should be as B.3. Rear Springs. As agreed we have shewn 50" rear springs with 5.500 initial deflexion and 9.500 total for a load of 1050 lbs which we believe by comparison with Wraith should be right for the Saloon with Division. We suggest that we should detail a spring and approach the spring makers. By means of the springs the car is raised 1.000 above B.3. Front Springs. We suggest these should be 900 lbs load and 6.500 initial deflexion. It is not possible to increase the total wheel movement, so we have increased the bump from 2.750 to 3.500 and reduced the rebound accordingly, raising the front of the frame .750. We shall issue suitable springs immediately. The rest of the front suspension is the same as B.3. Continued..... | ||