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).
Car comparisons, parts compatibility, solder specifications for radiators, and front-end drives.
| Identifier | ExFiles\Box 178\2\ img157 | |
| Date | 3rd March 1934 | |
| -2- I believe this car will surprise us as to the results that can be obtained with the simplest possible layout. When I get back to Detroit I shall have the opportunity of having a real run round in a production car, and if I think it is a good car to compare with the 20/25, shall be glad to know whether you agree to my bringing one back. Apart from the suspension, the body is of considerable interest, as also the forward engine position, front wing and rad. mounting, etc. With regard to the parts to fit to a 40/50, we can always take these off the La{L. A. Archer} Salle. I am inclined to think, however, that putting the front half of an American car onto the 40/50 frame, which we know is weak torsionally, will not be very satisfactory. However, if you want to do this and don't want the complete La{L. A. Archer} Salle car, cable me and I will act accordingly. SOLDER FOR ETHYLENE GLYCOL RAD. I could get no official information re this, as it has been developed at Wright Field and is still supposed to be an official secret. However, the radiator manufacturers gave me the following data, which I hope is exactly the right thing, and have cabled Lovesey accordingly. Solder composed of lead with 5% to 6% of silver of .9995 fineness, gives a shearing strength of 1500 lbs/sq.in at 350°F.{Mr Friese} This solder has a melting point range from 580° to 700°F, and the temp. of application should not exceed 850°F.{Mr Friese} when soldering hard drawn brass or copper. Optimum bath temperature for dipping not in excess of 850°F.{Mr Friese} and variation from the centre to the outside of the bath should not exceed 15°F.{Mr Friese} Under no conditions should the core be re-dipped. Excess solder to be removed with a torch, repair with a soldering iron. FRONT END DRIVES. Spent half a day with the Morse people. This is manufactured in England by the Morse Chain Co.Ltd., Letchworth. The Reynolds people make the automatic adjuster shown in the Catalogue enclosed (pages 10 and 11). Therefore all parts of the job are obtainable in England. We could of course hob the sprockets ourselves. | ||