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).
Standardisation of the 'Commodius' Plug, Type 30X, for the Phantom III model.
| Identifier | ExFiles\Box 162\4\ img300 | |
| Date | 14th April 1937 | |
| PHANTOM III STANDARDISATION of PARTS REF. XA/DEV/22802 (AIT) ART / 14.4.37 PHT/C.O.S./27 T.C.C. d100S X K.I.C. "COMMODIUS" PLUG. TYPE "30X." Stamped Text: Extra tool cost nil. To be brought on to production immediately. Origin: To improve engine performance with regard to overoiling. Report of Experimental Test: Fitted to all exp. P.III cars and one P.III chassis. Also to two customers chassis. Also run on XX-JA at Sconce. Will stand more oil than the present solus plug. Cost Table: MATERIAL b 3 c 0 d 0 LABOUR b 2 c 8 d 8 Bought outside CHARGES b 2 c 2 d 1 TOTAL b 7 c 10 d 9 Totals: 0 8 1, 0 12 1 Approval Table: INITIAL | DATE | REMARKS ROW RH{R. Hollingworth} | 16.4.37 | Agreed C O | 15.4.37 | Agreed E J.E. | 16.4.37 | Agreed subject to... GA | 17.4.37 | Agreed SY | 16.4.37 | Agreed E.B | 17.4.37 | Agreed SHR | 16.4.37 | Agreed MX{John H Maddocks - Chief Proving Officer} | 16.4.37 | Agreed HS{Lord Ernest Hives - Chair} | 16.4.37 | Agreed by proxy for KMA | ||