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).
Electrical experimental record sheet for a 28 slot armature.
| Identifier | ExFiles\Box 68\4\ scan0053 | |
| Date | 19th April 1926 | |
| X. 8672 ELECTRICAL EXPERIMENTAL RECORD SHEETS 28 Slot Armature 2 X. &No:- 8672 Date on. | Location. | Date off. | REMARKS. | Miles reading start. | Miles reading finish. | Miles covered. | Total miles. --- | --- | --- | --- | --- | --- | --- | --- 20-6-27 | Lab. | 20-8-27 | Recd. from shop. Made to drawing. In std carcase 13.7°. Output low. B. 9.7° gave peak of 12.3 amps. | - | - | - | - 20-8-27 | Shop | 1-9-27 | Comm skimmed. | - | - | - | - 1-9-27 | Lab. | 12-9-27 | Tested in std (N.B.J) carcase. Max per. setting. B. 6.7°C 121.5° Ref. perfor. curve. B. 6.7°C 122.5° | - | - | - | - 12-9-27 | " | 6-2-28 | | - | - | - | - 6-2-28 | Shop | 16-3-28 | Sent into shop to be modified to B 9°. as per new drawing. | - | - | - | - 16-3-28 | Lab. | 19-3-28 | B=7.5° in J machine. Max Perm. + Ref curves taken. | - | - | - | - 1-4-28 | " | 13-4-28 | Put in I machine. B=7.5° Ref curve taken. Then set to half max perm. (12.8 amps at 80°C) | - | - | - | - 13-4-28 | 9 EX | 1-5-28 | Reading taken. | 6,164 | 7,163 | 999 | 999 1-5-28 | " | 1-6-28 | " | 7,163 | 8,468 | 1,305 | 2,304 1-6-28 | " | 2-7-28 | " | 8,468 | 516 | 2,048 | 4,352 2-7-28 | " | 19-7-28 | " | 516 | 1,970 | 1,454 | 5,806 19-7-28 | " | 6-9-28 | " | 1,970 | 2,208 | 238 | 6,044 6-9-28 | " | 1-10-28 | " | 2,208 | 4,368 | 2,160 | 8,204 26-10-28 | " | 1-12-28 | " | 4,368 | 5,460 | 1,092 | 9,296 1-12-28 | " | 4-1-29 | " | 5,460 | 7,446 | 1,986 | 11,282 4-1-29 | " | 1-2-29 | " | 7,446 | 8,119 | 673 | 11,955 1-2-29 | " | | " | 8,119 | 8,179 | 60 | 12,015 Test completed 1-2-29. 19.4.26. | ||