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).
Test log sheet for dynamos, detailing performance data and remarks from multiple tests.
| Identifier | ExFiles\Box 70\4\ scan0042 | |
| Date | 9th May 1924 | |
| X.9660. RR. EAC. DYNAMO. X.9661do. Handwritten: X 8781 do Date. Dynamo number. (3) Cold condition Temp. (°C). Volts at 430 RPM. >=12.4 (4) Output after 20 mins. at 1100 r.p.m. Amperes. Volts. (=14.5 ) ->15.4<- (5) Warm condition D.C. volts at 465 R.P.M. >=13.6 (6) (7) (8) & (9) Remarks. 29.2.24. B 16 12.6 14.8 15.4 Slight hum at high speeds. Sparking, reasona Shrill brush noise and bad chattering at high speeds. 10.4.24. O 17 12.8 15.8 15.4 13.67 Extra deep holders. Slight hum. Little brush noise. Brush flex ibles cut down. 25.4.24. 03 15 12.8 15.6 15.4 13.64 Modified brush holder Brush flexibles cut down. Slight chatterin at high speeds. 3.5.24. 05 15.5 12.9 15.9 15.4 14.10 Modified holders. Brush flexes cut down. Front brg. slightly slack. 9.5.24. 07 20 12.8 15.1 15.4 14.16 Modified holders. Brush flexes cut down. chattering at high speeds. 1.3.24. | ||