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 report for an S.S. dynamo No.SS5, detailing performance data and faults.
| Identifier | ExFiles\Box 60\1\ Scan061 | |
| Date | 22th December 1928 | |
| X7660 EFC. 22.12.28. S.S. dynamo No.SS{S. Smith}5. Output 14 amps. at 18 volts 1300 R.P.M. Peak at 1300 r.p.m. O.C. volts 15.2 at 590 r.p.m. Bad electrical howl over 1350 r.p.m. Slight burning on control and negative brushes. A.Watson | ||