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).
Record sheet for a 20 HP experimental dynamo.
| Identifier | ExFiles\Box 165\6\ img221 | |
| Date | 1st July 1930 guessed | |
| 20 H.P. EXPERIMENTAL DYNAMO RECORD SHEET DYN. NO.: 288 Date | Location | Particulars | Chassis or Engine No. 2nd March 1923 | Lab. | Recd. for use, from production. 18th April 1923 | Lab. | End-plate slotted for brush angle tests. 16 May 1923 | Shop. | Comm. micas undercut. 11th Sept. 1923 | Lab | For broken brush holder replacement. 20 Sept. 1923 | Lab | New brush-gear. 26 Sept. 1923 | Lab | Tested to 1/2x spec'n. All brush nuts tight. En rig. 1-XI-23 | 3GII | Comm. undercut by special process. | 3010 15-XII-23 | 3GII | To replace lugs. | 5341 17-V-24 | fab. | Main brushes f good. Comm. OK. | 8113 (3GII) 26-6-24 | fab. | Replaced by R.S. set 13-VIII-24 | fab. | fitted EQ2 brushes + 811 - .867 & 861 (-0205) sett 12 x spec'n. Control 8 1/2 segs. 27-VIII-24 | Dispatch Stores | For London (5 GII) on shop Spares note. 26-XI-24 | 5 GII | Recd. off chassis. | 4291. 25-III-26 | fab | Rpt.C4/AC.54/3-III-26. Tested out with ETJB poles (eccentric bore) Main br's normally 12" sted set K 7° Rptd. 23-IX-26 | fab | fitted 57 seg + 16 T arm. July '30 | Stores | For disposal. | ||