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).
The correct setting for Spectre ignition distributor contact breaker gaps.
| Identifier | ExFiles\Box 61b\2\ scan0260 | |
| Date | 12th August 1935 | |
| 16119. By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Wst. c. to Sft{Mr Swift}/Mr.Brock. c. to Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Wst.9/MA.12.8.35. SPECTRECodename for Phantom III IGNITION DISTRIBUTORS. We have found on the bench and on the engine that the best setting for the contact breaker gaps on the new SpectreCodename for Phantom III distributors is .030". This setting must be adhered to within close limits, i.e. ±.001" otherwise the correct functioning of the ignition coils at high speeds will be jeopardized. Hs{Lord Ernest Hives - Chair}/Wst. | ||