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).
Suggestion to redesign the Phantom II starter main and auxiliary switch unit to correct the contact time sequence.
| Identifier | WestWitteringFiles\U\May1930-July1930\ Scan066 | |
| Date | 29th May 1930 | |
| ORIGINAL To R.{Sir Henry Royce} from EFC. c. Sg.{Arthur F. Sidgreaves - MD} c. Hy.{Tom Haldenby - Plant Engineer} E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Wor.{Arthur Wormald - General Works Manager} EFC8/AD29.5.30. X.7655. PHANTOM II STARTER MAIN AND AUXILIARY SWITCH UNIT. We suggested and explained the reason in detail to MR.Elliott that this unit might be improved in respect of the correct time sequence of copper and carbon contacts, by a re-design. It is at present the case that the rapidity of action combined with the inertia lag of the carbon arm may, and does in some cases, result in the copper make actually taking place very slightly in advance of the carbon make. This causes sparking at the copper contacts with the result that they do not invariably maintain their good condition. The point has been demonstrated by the use of the electric chronograph. EFC. | ||