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 spark plug gap settings for 14 mm Bentley plugs.
| Identifier | ExFiles\Box 162\4\ img028 | |
| Date | 13th January 1934 | |
| By.{R.W. Bailey - Chief Engineer} From Ha/Wst. c. to Mx.{John H Maddocks - Chief Proving Officer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to BN.{W.O. Bentley / Mr Barrington} 81918 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} Hs{Lord Ernest Hives - Chair}/Wst.1/MA.13.1.34. BENTLEY SPARKING PLUGS. We have found the best setting for the plug gaps to be .015" to .020" on the Bentley 14 mm plugs. Will you please arrange to instruct that the plug setting gauge supplied in the kit conforms to these limits. Ha/Wst. | ||