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).
List of alterations to the specification for the B.III and B.50 chassis suspension.
| Identifier | ExFiles\Box 112\1\ scan0095 | |
| Date | 14th June 1938 | |
| 846 446 To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/FWK. Rm{William Robotham - Chief Engineer}/FWK.2/JH.14.6.38. B.III and B.50. SUSPENSION. Will you please make the following alterations in the specification of the above chassis. (1) New type Yoke FB.3675 alteration No.17647 to be machined to take a silentbloc bush FB.3143 at top pivot. (2) Compression stays in the lower triangle as indicated in SCD.699 Both torque arms to be cast steel. (3) Silentbloc bushes FB.3143 - 4 to be supplied by Rm{William Robotham - Chief Engineer}/FWK. (4) Rebound buffers as in GW.2043 but with 45 durometer hardness instead of 70 - to be supplied by Rm{William Robotham - Chief Engineer}/FWK.. (5) 8" initial deflection springs FB.3826. All springs to be shot blasted and cadmium plated .004. (6) New type rear springs, main leaf with threaded pivot on front end FB.3851-S. (7) ½" bolts for mounting of torque arm socket. Rm{William Robotham - Chief Engineer}/FWK. | ||