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).
Part substitutions and modifications for condenser components.
| Identifier | ExFiles\Box 45\3\ Scan050 | |
| Date | 1st July 1921 | |
| -2- EXPERIMENTAL BY/WERl/EF6. 7. 21. F.{Mr Friese} 7370 - Condenser Securing Piece. (X) F.{Mr Friese} 7940 - Countersunk Head Screw (long). (X) By cutting this down in length .750 this part can be made into F.7939 and used (Number off F.7939 required now is 4 instead of 2). The Clamping Plate D.1841 can be produced from Forging F.7368F as also can the Insulation D.1842 be produced from the standard Insulation F.7364. Regarding the Condenser Casing E.18210 (Die Casting) approximately 750 of which are now in stock for "P" and "R" Series these can be used by plugging up the two .156 holes and facing the two bosses and then drilling the .201 hole for the central earthing stud. BY.{R.W. Bailey - Chief Engineer} has agreed to this scheme, will Mr. Shelton therefore instruct a drawing of the modified Condenser Casing. BY/WER. WSR | ||