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).
Material and design considerations for Bensport Cylinder Studs.
| Identifier | ExFiles\Box 86\1\ scan0004 | |
| Date | 6th June 1932 | |
| V 1219 To R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} E.7/HP.6.6.32. re Bensport Cylinder Studs Referring to telephone conversation of this afternoon, we had not lost sight of the question of the thread in the castings although this was not mentioned in our memo. We have had satisfactory service from parallel studs in which the thread has been made 2¼" diameters long, and we think they are satisfactory when the thread is well buried below the surface, which is the case with the cylinder studs in question. With regard to the cylinder block on this small engine, the material is of cast iron, and our previous experience has been with aluminium, aluminium having lower value of E.{Mr Elliott - Chief Engineer} should allow of better distribution of the load along the threads, but the cast iron scores in another direction in having the same coefficient of expansion as the material of the stud. We had in mind the use of better material for these studs so as to withstand over-load due to excessive tightening. E.{Mr Elliott - Chief Engineer} | ||