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).
Suitability and testing of various electrical components, including motors, dynamos, and batteries for a small car.
| Identifier | ExFiles\Box 51\5\ Scan141 | |
| Date | 6th May 1921 | |
| Contd -2- EFC {E. Fowler Clarke - Electrical Engineer} 3/T6.5.21. the fixing of these. It is thought that their type SC motor would be suitable, this having a carcase diameter of 4¼". Quoted quantity price for the SC motor with plain spindle extension £6.15.0. N.B. These quoted prices only hold good temporarily. With regard to the dynamo, they offer us their standard 5" diameter machine. Copy of our tentative specification of operation of dynamo for R.R. car was left with them, and it was arranged that before sending the dynamo they would endeavour to so arrange the machine to meet this specification of performance. For R's information we attach copy and table of this specification. (See X.4283) It will be seen that this is similar to that for the 40/50 chassis but with slightly altered quantities. We are not sure that this represents finally what we may require. Further information regarding motors and dynamos of other makes proposed for the small car must be sent to you in tabular form later. We had recently received from the C.A.V. Co. one of their latest cutouts, this being a great improvement over their previous circular type cutout which we thought was a very bad job. This new type D cutout is being tested by us on the bench and results will be shortly reported, at which time the cutout with be sent to R. {Sir Henry Royce} for examination. C.A.V. Willard Batteries. We were able to see a good deal of the C.A.V. battery shop. It appears that C.A.V. Willard batteries are now being made and sold in fair quantities. Our experience of C.A.V. plates and batteries generally (mostly celluloid) has been very good. The plates seem to retain their paste relatively well. So far as we have gone with the tests of C.A.V. Willard batteries recently received, this is further borne out. Also we have had very good high rate discharge results from these batteries, but further details of this will be reported independently. The question of battery vents was taken up with the C.A.V. Co. as we did not at first think that the type of vent supplied would be perfectly satisfactory, although so far as we have now gone we have had no trouble with these by acid spraying out. Contd. | ||