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).
Experimental dynamo record sheet detailing tests and modifications for unit X 604.
| Identifier | ExFiles\Box 165\6\ img223 | |
| Date | 1st July 1936 | |
| 20 H.P. EXPERIMENTAL DYNAMO RECORD SHEET. DYNAMO No.: X 604 July '36 Stains for disposal. Date | Location | Particulars | Chassis Miles | Total Dynamo Miles 15th Sept 1923 | 4GIII | Fitted straight from production. | 2872 | 0 10th Oct. 1923 | Lab. | Comm. grooved + bluish & good. | 3730 | 1218 16 " " | Lab. | Recd for test. Sent EP{G. Eric Platford - Chief Quality Engineer} in exchange for 620. | 3842 | 1330 26 " " | " | Recd EP{G. Eric Platford - Chief Quality Engineer}(MN) for noise 30 " " | " | With Supl. 5th Nov " | 7GI | Sent OK | 2075 | 17 Nov. 23. | 3GI | For noise test replacing 562. | 2565 (79GI) | 1820 23 Nov-23. | Lab. | Replaced by 625. Still noisy. V.{VIENNA} little tooth drag. | 2689 | 24 " " | " | Fitted straight slot-arm. Fair tooth drag. Main br.{T. E. Bellringer - Repair Manager} & E'dev. | 2800 (36II) | 27 " " | " | Comm. connections retarded one seg. to North br.{T. E. Bellringer - Repair Manager} 8° retd. 30 " " | " | For drive torque. "V" bad (EFC) Quadrant of rotation. 15 Dec " | 3GI | Replaced by 288. Fitted std. armature. | 2847 | 24-III-24 | Lab | 72 pole modifications [D51236]. | 3010 (3GII) | 23-VII-24 | Shop/Lab | Fitted poles giving .020" air-gap. Rect. Main brs. 8.5°. 23-X-24 | Shop/Lab | Front end-plate slotted to take 5° each way from std. 23-XII-24 | Shop/Lab | Fitted 2 coils/slot arm. #80. Poles appear left just-laminated. 7-I-24 | W/S Lab | Comm. axes 14° from pole axes. End plate std. Counts moved to y-column position. 2-II-26 | Lab | For further special poles. 8-III-26 | Lab | Fitted poles (polished) # D 51239 (-25° offset). | ||