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).
Considerations for engine suspension design, specifically regarding rubber mountings and chassis twist.
| Identifier | WestWitteringFiles\R\January1928-March1928\ 117 | |
| Date | 7th March 1928 | |
| FROM E.{Mr Elliott - Chief Engineer} C. to H.S. " " E.R. ORIGINAL E6/M7.3.28. EAC.10. ENGINE SUSPENSION. V7005 V7380 (text is crossed out) As a result of the experience with EAC.14. engine mounting, it is found desirable to use rubbers of very high rating for taking the engine torque, and very little movement can occur in the system before the suspension at the rear grows practically solid. This point requires special consideration in connection with EAC.10., where there are four such feet on the engine, and it would appear that we ought to make the rubbers on the front feet of as low a rating as found practicable, to avoid subjecting the crankcase to excessive torsion due to the twist of the chassis frame. It is realised that EAC.10. frame is probably much stiffer than anything we have ever had, but at the same time the capacity of the engine suspension for accommodating this movement is not very large. E.{Mr Elliott - Chief Engineer} | ||