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 to test a spherical versus flat point on the adjustable contact screw for 20 HP and 40/50 HP ignition distributors.
| Identifier | ExFiles\Box 61b\2\ scan0049 | |
| Date | 22th October 1926 | |
| X7690 [REDACTED] C. EFC. BY/RD6/ML22.10.26. X X4652 RE 20 H.P. AND 40/50 H.P. IGNITION DISTRIBUTORS. In order to test whether a spherical point has advantages over a flat one on the adjustable contact point of the Distributor, we send you herewith a print of D.51503 - I.T. Contact Screw, you will no doubt be able to modify some of our standard Screws - D.50468 to produce this. BY/RD. | ||