Blueprint for a suction chamber cap, made of brass with a dull nickel finish.
| Identifier | ExFiles\Box 31\5\ Scan068 | |
| Date | 24th June 1933 guessed | |
| ALT. ALTERED FROM REASON DATE 1/32 CHAMFERS AT 45° DIAMOND KNURL 11/16 DIA x 26THD 1/16 DIA 11/16 DIA 17/32 DIA 15/16 DIA 5/64 DRILL 1/16 1/16 1/64 1/32 1/16 30° DULL NICKEL FINISH CAP FOR SUCTION CH. FOR ROLLS ROYCE. MATL BRASS. THE S.U. Co. ADDERLEY PARK. B'HAM. PART NO. 1549 DRAWN PC DATE 15- | ||
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).