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).
Blueprint showing the adaptation of part F73576 as a spring drive on a Phantom model.
| Identifier | ExFiles\Box 14\5\ Scan022 | |
| Date | 20th September 1928 | |
| ADAPTATION OF F73576 AS SPRING DRIVE ON PHANTOM A.{Mr Adams} NEW OUTER PLATE F73092 HAVING A COMPLETE RING TURNED TO HOLD SPRINGS INSTEAD OF SEPARATE BOSSES, AND SPLINED EXTENSION B. G73601 MODIFIED AS SHEWN CHAMFER DIAMETRAL SLIDING FIT C. ADDITIONAL PORTION PEGGED AND BRAZED INTO EXISTING CLUTCH SHAFT 10 SPLINES EQUALLY SPACED LENGTH MAX THAT WILL PERMIT PORTION B BEING DROPPED WHEN COUPLING IS REMOVED PEND LEVER TO BE CUT OFF FLUSH OR ALTERNATIVELY A NEW OUTER PIECE F73483 TO BE MADE LESS PENDULUM LEVER Stamp: ROLLS-ROYCE LTD. DERBY 21 SEP 1928 Signature: P.m 20/9/28 | ||