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 Lodge Plugs type HD.3 for 5 & 5.25 compression ratio engines.
| Identifier | ExFiles\Box 171\2\ img036 | |
| Date | 12th August 1932 | |
| RR 755 (10M) (30405. 21-4-32) BM. S/5352/4. COMPLETED 30.9.32. STANDARDISATION OF CHASSIS PARTS. Date 12.8.32. X No. 4425 Drawing No. 7970 Part List Description of Parts: LODGE PLUGS TYPE HD.{Mr Hayward/Mr Huddy}3 FOR 5. & 5.25 COMPRESSION RATIO. Origin: To prevent preignition on high comp. engines. Experimental Test Report: A series of plugs have been tested for the above, and the Lodge HD.{Mr Hayward/Mr Huddy}3 type were the most satisfactory. Road Test Report: Fitted to 19-EX and ran 10,000 miles in France. There has been no sign of preignition throughout the tests. Mag. setting .020", Coil .025", gave the best results. [STAMPED: PHANTOM II] Weight of Old Part: £ --- Cost of Old Part: £ --- Weight of New Part: £ --- Cost of New Part: £ --- Difference per Car: £ --- Difference per Car: £ None. Cost of Parts in Works which will be scrapped if commenced on:- Series.........£....... Series.........£....... Series.........£....... Signature from Cost Dept. that above is correct. /Rb{R. Bowen}28.9.32.G.28.9.32. Wor{Arthur Wormald - General Works Manager} INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 29.9.32. | Agreed Sg.{Arthur F. Sidgreaves - MD} R.{Sir Henry Royce} | 20/8/32 | Agreed YHR WOR.{Arthur Wormald - General Works Manager} | 15.8.32. | Agreed Wor.{Arthur Wormald - General Works Manager} C. | 15.8.32. | Agreed C. RG.{Mr Rowledge} | 16.8.32. | Agreed Rg.{Mr Rowledge} DA.{Bernard Day - Chassis Design} | 18.8.32. | Agreed Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} | 16.8.32. | Agreed By.{R.W. Bailey - Chief Engineer} EP.{G. Eric Platford - Chief Quality Engineer} | 15.8.32. | Agreed EP.{G. Eric Platford - Chief Quality Engineer} (Assume misfires and oxidizing as reported now OK at .020" gap.) EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} | 19.8.32. | Agreed AE. PN.{Mr Northey} | 31.8.32. | Agreed PN.{Mr Northey} Hs.{Lord Ernest Hives - Chair} | | Agreed Hs.{Lord Ernest Hives - Chair} | ||