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 considerations for the radiator, frame riveting, and water pump fixing.
| Identifier | WestWitteringFiles\H\November1921\ Scan73 | |
| Date | 1st November 1921 | |
| To HS.{Lord Ernest Hives - Chair} & HY.{Tom Haldenby - Plant Engineer} from R.{Sir Henry Royce} -3- R10/G25/11/21 Contd. says he has tried these on the bumping test, and they did not last but knocked to bits. It was noticed that some of the Continental cars have horns which reach out a long way before turning down, the vertical portion possibly providing a certain amount of flexibility which might reduce the stress. We do not, however, know what the amount of this movement is and it was thought that we should proceed with the improved dumb iron already sent through, which avoids any harsh change of section along the edge of the side channel. (9) RADIATOR. The front and rear edges of the top of the radiator tank are now rounded. It occurred to me that the edge of the shoulder should also be rounded. [Handwritten note next to radiator section: Please make another one with .150"] to improve the appearance of the tank, and facilitate the pressing operation. The rounded edges permit of much stronger, and less expense construction, and to me look right. Mr. Haldenby suggested that the radius on the edges of the tank might be smaller, and yet the tank still be an easy pressing. I think this is ~~possibly~~ a good move, as where this radius meets the corners of the side plate, the construction is unsatisfactory. We will investigate this point and send some further instructions. I think the radiator filler should be moved into the centre of the tank. It was originally placed somewhat behind with the idea of giving a deep-chested effect. I propose we keep this pattern of radiator for the 20 H.P. it will be one of the features of this model. (10) RIVETTING FRAMES. Mr. Haldenby stated that the Works would prefer to substitute bolts for some of the rivetting, as the latter takes rather a long time. This is being done cold where the rivets are too small to hold the heat. I think we should not be too quick to change over to bolts in this respect, as we notice that where a car has to be produced cheaply, the frame is invariably rivetted. This point should be gone over to see whether or not the rivets want to be made larger or greater convenience or tackle procured for handling the work, possibly men more used to the work. (11) WATER PUMP FIXING. The hole for the top stud cheese is unsightly, as also | ||