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).
Increasing the crown thickness for battery ignition mushroom H.T. rotors to prevent breakdown.
| Identifier | ExFiles\Box 61b\2\ scan0106 | |
| Date | 20th April 1929 | |
| BY.{R.W. Bailey - Chief Engineer} from EFC. c. BY/RD. for Brock X7690 EFC2/T20.4.29. BATTERY IGNITION MUSHROOM H.T. ROTORS. Herewith please receive copy of my assistant's report WD.{Mr Wood/Mr Whitehead}55 concerning the above. We are satisfied that with the extra increase of crown thickness this mushroom rotor will be rendered quite safe from the possibility of a through breakdown. We certainly agree with the decision of not utilising those rotors already produced whose crown thicknesses are slightly smaller than previously intended. EFC. | ||