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).
Design suggestions and decisions for various car components.
| Identifier | WestWitteringFiles\H\November1921\ Scan77 | |
| Date | 25th November 1921 | |
| To HY.{Tom Haldenby - Plant Engineer}& HY.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} -7- R10/G25/11/21 Contd. I suggest that we might use an unclosed hook on each end of the spring to enable a spigot to engage the first coil and the hook to engage a solid pin formed on the collar, the spring being kept in position by a keep-piece or some form of clamp. I also want Mr. Hives to find out what other people are doing in respect to holding the spring, so as to compare with our proposals. (26) CHASSIS FRAMES. I thought I had made it clear that we were going to order our frames from Rubery Owen, and to use their standard steel. This should be done. Mr. Hall should pass the materials. (27) DYNAMO. x L39L The Lucas dynamo at present being tests on the chassis only gives about two amperes at high speed in addition to the ignition current, indicating that the charge tails off too much, and we shall not get sufficient. I suggested we fit C.A.V that gives the current we require, and make our own equal to this. Do not trouble other firms to make us special machines. (28) VALVE SPRING ASSEMBLY. Mr. Hives has made a "C" clamp screwing against the valve head underneath and depressing the valve spring and washer on the top by means of a horse shoe or ring shaped end, which allows sufficient clearance for inserting the split taper cotters. I think this is the best way to tackle the job. Mr. Hives to send a rough model so that one can be designed to be neat and light on the same lines. I assume the valves can be assembled without a special tool. (29) DYNAMO. x4383 With regard to the features on the R.R. dynamo in connection with the terminals, we are now working on these and will send them through about Tuesday. (30) BODY HOODS. Mr. Hives suggests that the hoods we specify for open cars should be fitted with side curtains that open and close with the doors, as these are in very general demand. He thinks that there are now some English hoods available, which are still better than the original American ones. (31) REAR AXLE LUBRICATION. It is agreed that the rear axle should run 5000 miles between oilings and that the instruction book for the "Goshawk" chassis should be worded accordingly, giving longer intervals than those for 40/50 H.P. Mr. Hives asks that the oiling plugs be so arranged as to make it unnecessary to carry oil into the interior of the car. I think this is good if it can be carried out, and I would like Mr. Hives to investigate on the actual chassis what are the possibilities of filling up through a hole in the back cover on the axle box by removing the valance (probably no valance now, but "D" shaped tank) which we intend to use above the petrol tank. For the present I think we should proceed with the filler and level plugs as they are now on the axle. | ||