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).
Graph showing make ratio-speed curves for a Delco-Remy Distributor, model 5249.
| Identifier | ExFiles\Box 163\7\ img114 | |
| Date | 1st December 1927 guessed | |
| .020" GAP. .030" GAP. MAKE RATIO-SPEED CURVES OF DELCO-REMY DISTRIBUTOR (Model 5249) 1100 1200 1300 1400 1500 1600 1700 R SPEED r.p.m. H.E.W. | ||