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).
Acceptance test log for Watford Aero Magnetos to an abridged specification.
| Identifier | ExFiles\Box 43\4\ Scan221 | |
| Date | 6th February 1930 | |
| WATFORD AERO MAGNETOS. X.4021. ACCEPTANCE TEST TO ABRIDGED SPECIFICATION. Date. | Magneto No. | (1) Remarks. | (2) Remarks. | (3) Min. sparking speeds. (a), (b), (c) | (4) Remarks. --|---|---|---|---|-- 17.5.29. | SP.{Mr Spinney}12-5 98090 | O.K. | O.K. | 180 - 240 | Special for R.{Sir Henry Royce} engine. 17.5.29. | SP.{Mr Spinney}12-5 98088 | Misfires occasionally. | O.K. | 190 - 360 | Special for R.{Sir Henry Royce} engine. 28.5.29. | SP.{Mr Spinney}12-5 98087 | O.K. | O.K. | 190 - 300 | Special for R.{Sir Henry Royce} engine. 28.5.29. | SP.{Mr Spinney}12-5 98089 | Misfires occasionally. | O.K. | 130 - 400 | Special for R.{Sir Henry Royce} engine. 1.2.30. | IS.12 98033 | O.K. | O.K. | with 6' braided cable. 260 - 500 | F.{Mr Friese} engine type test. 1.2.30. | IS.12 98034 | O.K. | O.K. | Misfires - 1000 | Poor performance. 3.2.30 | IS.12 83119 | O.K. | O.K. | 180 - 800 | H.{Arthur M. Hanbury - Head Complaints} engine type test. 3.2.30 | IS.12 83120 | O.K. | O.K. | 210 - 750 | H.{Arthur M. Hanbury - Head Complaints} engine type test. 3.2.30 | IS.12 83132 | O.K. | O.K. | 210 - 800 | Spare. 6.2.30. [Vertically on right side] X 4021 | ||