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).
Proposed fitting and testing of vibrator-controlled dynamos for various chassis models.
| Identifier | ExFiles\Box 60\3\ Scan190 | |
| Date | 3rd March 1933 | |
| x6092 R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Sg.{Arthur F. Sidgreaves - MD} c. to Wor.{Arthur Wormald - General Works Manager} c. to L. c. to Da.{Bernard Day - Chassis Design} c. to Hdy.{William Hardy} c. to My. Hs{Lord Ernest Hives - Chair}/Wst.2/MA.3.3.33. POSITION OF VIBRATOR CONTROLLED DYNAMOS FOR R.R. CHASSIS. As it is proposed to fit the 40/50 size of machine to both Bensport and 40/50 we propose to group these chassis together and the Peregrine and 20/25 chassis together to which the smaller size of dynamos will be fitted. 40/50 and Bensport. As a result of experience gained with a shunt machine on the Bench and on 19-EX, we have produced a dynamo which will give us a satisfactory output and which from preliminary tests appears satisfactory as regards commutation at high speeds. We propose to fit this type of dynamo to a 40/50 Expl. chassis complete with C.A.V. regulator and to the next two Bensport chassis for test. At the same time we intend to carry out high speed full output Bench endurance tests. We are arranging for three more dynamos to be produced accordingly as soon as possible. 20/25 and Peregrine. We have a shunt dynamo running on 3.Per.II which gives the best performance we have yet obtained with the 5" carcase dynamo. The sparking is reasonable and although the maximum output for safe heating is not what we are aiming at (i.e. 14 amperes at 18 volts) no trouble has been reported by GWI. in France in regard to maintenance of the battery charge etc. If this dynamo and regulator is in satisfactory condition on examination at the conclusion of the 10,000 mile test we could go ahead if necessary with a similar machine on production. | ||