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 points for ignition, starter, brakes, instrument board, and steering.
| Identifier | WestWitteringFiles\H\November1921\ Scan74 | |
| Date | 25th November 1921 | |
| To HS.{Lord Ernest Hives - Chair} & HY.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} -4- R10/G25/11/21 Contd. the raised boss to provide a normal face for drilling. I think we should avoid this latter, and raise the top of the cheeses to get a flush effect and possibly have a somewhat rounded top to the cheese as suggested by Mr. Haldenby. (12) IGNITION WIRE TUBE. x3485 The red fibre tube at present on the engine is for carrying the high tension wires is not the very best colour, and as the bakelite micarta tube also is not a very suitable colour, and is understood to be easily scratched, I think we should go to a black tube.(in fibre or bakelite) (13) HAND STARTER JAW. This should finally be arranged for a cross pin type of jaw and as the engine is so small and easily turned I do not think we need worry about where the jaw comes rotationally, this small engine being easy to turn by hand. (14) BRAKE ADJUSTMENT. Mr. Hives asks for an open turn-buckle, so that the amount of thread in engagement can be seen. Also that the adjustment could be made by fingers without the use of tools. I agree that the open turn-buckle is to be preferred but I do not think that the adjustment would be satisfactory if left loose to rattle and wear on the threads such as would be necessary with finger adjustment. Where the turn-buckle form of adjustment is used, it is generally brought to the one end of the rod near the lever. We will send a drawing of the modifications considered desirable. (15) INSTRUMENT BOARD. x4067 Mr. Hives asks if this could be carried from the dashboard by two brackets, so that the chassis can be completed at the works as far as the wiring and control, and to avoid the necessity of having a man going round to all the coachbuilders for joining up these controls and wires. It was suggested that the instrument board could either be supplied as a plank which the coachbuilders would trim off to suit his particular style of body, or that the instrument board could be made a small affair holding all the instruments and controls, and the coachbuilders would put a surround of wood to suit the body. I agree with the principle of the idea, but it is not a good policy in my opinion, to attempt too much at this stage, and we do not know where the instrument board should be exactly, and we wish to leave the chassis as flexible as possible, as we have such a lot of more important work to do at the moment, and I therefore think that we should not attempt too much beyond our 40/50 H.P. practice in this respect, but have promised to make an attempt which Mr. Evernden has in hand. (16) STEERING. Mr. Hives thinks that the steering column for "B" position could be supported from the instrument board. I do not like attaching the column to the board, but would prefer to put in a stiffer tube on the column itself. The increased dimensions if found necessary | ||