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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}
  
  


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