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).
Instruction sheet containing a table of magneto distributor dimensions.
| Identifier | ExFiles\Box 4\5\ 05-page209 | |
| Date | 9th June 1921 | |
| R.R. 290 (500 Bks.) (SP{Mr Spinney} 133, 6-11-18.) P&P. 187886 X430 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To E.F.G. Order No. P.B.4. Customer's No. X430 June 9th 1921 Table of Magneto Distributor Dimensions Magneto | Type | Width of carbon brush m/m | Width of segment m/m | Sum of shank and segment widths m/m | Remarks Watford | E.6 | 15.36 | 62.10 | 77.46 | " | E.O.6 | 15.91 | 61.90 | 77.81 | R.{Sir Henry Royce} Bosch | ZR.6. | 12.40 | 64.60 | 77.00 | U.S.A Bosch | ZR.6. | 22.40 | 61.40 | 83.80 | " | B.6 | 21.70 | 17.91 | 39.61 | front spark distributor " | DUZ6 | 20.30 | 60.60 | 80.90 | Conner | CM.I | 10.08 | 61.70 | 71.78 | B.T.H. | FM.6 | 26.30 | 24.90 | 51.20 | front spark distributor Eisemann | G.N.6 | 54.80 | 18.30 | 73.10 | six carbon brushes and rotating segment Dixie | Aero 64% | 17.68 | 53.90 | 71.58 | Signed C.H.P. This Sheet must be filed on completion of the work. | ||