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).
Extract concerning combined magneto & battery ignition systems, hydraulic relays, and modifications to connecting rods and pistons to prevent engine knock.
| Identifier | ExFiles\Box 72\1\ scan0152 | |
| Date | 1st April 1924 | |
| MADE AT INLEY [Handwritten: X9030] Extract from R1/M3.4.24. RE EAC, COMBINED MAGNETO & BATTERY IGNITION AUTOMATIC ADVANCE. (RR. HYDRAULIC RELAY). X.3949. X.2974. X.9030. In addition it is assumed that the con. rods may require lengthening, and every fraction of weight removing from the reciprocating end of the con. rod and piston. I assume that we have the lighest type of pistons which do not knock.. How much lighter would Ricardo's be ? Has he succeeded in preventing knocks ? R.{Sir Henry Royce} | ||