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).
Review and critique of various engineering design components and practices, with suggestions for improvement.
| Identifier | ExFiles\Box 180\M6\ img073 | |
| Date | 5th July 1927 guessed | |
| (4) (8) I cannot understand the reason for the rods to bring the current to the bars. They are shewn passing down close to the sides of the 12 X 6s. in the form of long bolts with insulating tubes. Why are they not cables coming to the fishplate joints? Drill fairly large hole top and bottom quite close to the web round the edges, make a piece of sheet metal troughing, and case the insulated wire close to the girder web (because I can see that it is your desire to keep clear of the transporter runners.) (9) In most cases connectors can be made of sheet copper, known as flag connector. is much better than unless of open sheet metal type. (10) It will be realised that everything possible now-a-days is made from sheet metal punchings and pressings, or bar work, or die castings, in place of forgings and ordinary sand castings. To do this we must have standard details if we cannot have complete standard productions. (11) I notice you use some very objectionable pieces turned thus. Some miserable little pins here. Most good engineers would use i.e with good diameter collar. increase the strength enormously. (12) Prevention of the collar stud from turning, and locking the nut might be done with sheet metal washers, such as we use in motor car work. Small hole is drilled beside the big hole for the tab of the sheet metal lock washer. Stiffer, somewhat similar sheet metal stampings can be used to prevent collar studs from turning. (13) I could write for a long time but this letter has been delayed many days for additions, but I cannot pass my criticisms without saying that there seems ill provision for effective oiling, and for oil retaining. (14) According to the piece numbers it would seem that insulation (electrical work) has all been new and fresh by one drafting authority, with no signature of approval from head designer - Mr. Bentley or yourself - before | ||