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).
Letter discussing proposals for adopting rubber shock insulators on the 40/50 HP chassis.
| Identifier | ExFiles\Box 28\1\ Scan023 | |
| Date | 8th November 1925 | |
| Oy2-E-11825 November 8, 1925. Mr. Claude Johnson, Rolls-Royce, Ltd., London, England. (Copy for attention of Mr.Royce " " " " Mr.E.H.Hives " " " " Mr. Day) Dear Sir: Re: Rubber shock Insulators. We send herewith for Mr. Royce's attention 6 blueprints and copy of letter from Rubber Shock Insulator Company. The blueprints show their first proposals for adopting Shock Insulators to the 40/50 HP chassis, as suggested by yourselves. (i) Front Spring. Drawing shows the front spring raked aft, which the draftsman has evidently put in because it is standard American practice to obtain the necessary rake this way instead of by inclining the pad on the axle. The makers have been corrected on this point, and the pencil lines show that with the spring parallel with the frame, the rear bracket will be improved in shape and lightened, and the front of the car will only be lifted .800 of an inch instead of 1-1/2". The maker's recommendation of a cross bar across the front of the frame is undoubtedly due to their not realizing the function of our diagonal stays. We should welcome .800 more bumping clearance at the front springs since it is here where our cars are most liable to bump at present. We suggest that this would not necessarily increase spring breakage because the insulators themselves undoubtedly reduce the torsional stresses in the top plate which contribute to spring breakage at present. | ||