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).
Visit to Messrs. Lucas to discuss the fitting of C.A.V. voltage regulators to R.R. dynamos.
| Identifier | ExFiles\Box 60\3\ Scan192 | |
| Date | 3rd March 1933 | |
| x6044 R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Wst. c.c. to Sg.{Arthur F. Sidgreaves - MD} c.c. to Sor. c.c. to R.{Sir Henry Royce} c.c. to Da.{Bernard Day - Chassis Design} c.c. to Hsy. c.c. to By.{R.W. Bailey - Chief Engineer} VISIT TO MESSRS. LUCAS REGARDING C.A.V. REGULATORS ON R.R. DYNAMOS. We visited Messrs. Lucas yesterday in order to discuss one or two points with them regarding the fitting of the C.A.V. voltage regulator to R.R. dynamos, based on the results we have obtained with the regulators we have had on test. The items discussed were :- (a) Temperature effects. (b) Effect of position and method of mounting. (c) Steadiness of operation. (d) Contact points - life and field current values. (e) Variable series winding on the regulator to suit the output values of our large and small dynamo. It appears that our dynamo field current must lie between the limits of 1.5 to 2.5 amperes at 15 volts in order to gain maximum contact point life and we are taking steps to ensure this within reason. They consider that if the regulator is mounted horizontally as we propose on the dash no trouble should be experienced in the steadiness of operation. With regard to slight modifications to the regulator series winding for both types of dynamo they either propose to provide a variable shunt or alter the No. of winding turns. We prefer the latter as shunts are liable to give trouble due to contact drop etc. The position therefore with regard to the regulator is fairly clear and immediately we are | ||