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).
Technical drawing for a Standard Drop Arm Stamping.
| Identifier | ExFiles\Box 153\2\ scan0011 | |
| Date | 28th July 1927 | |
| SECTION BB IN DIRECTION OF ARROW B DRAFT ON LUGS NOT TO EXCEED 5° LUGS ADDED 5-5-30 BRINELL NO ADDED & SPEC HEAT TREAT TO MATL 14-11-31 1/8 RAD ON DIMPLE WAS 1/4 RAD 3-6-30 THICKNESS WAS 1.0625" LIMIT 19-9-29 ALTERATION LOCATION | DATE | INITIAL 1/4 WAS 1/16 AT E, 1R WAS 6R | 29-11-27 NOTE RE SAND BLASTING ADDED | 12-11-28 MAT WAS 3% NS.{Norman Scott} 369C | 17-12-28 HEAT TREAT NOTE ADDED | 19-3-29 ALL DIMENSIONS NOT LIMITED TO BE +/- 1/32 SCALE: - ADAMANT ENGINEERING CO LD LUTON. STAMPING DRWG FLASH NOT TO EXCEED 1/16 TO BE SAND BLASTED BY STAMPERS TO BE MACHINED WHERE MARKED EXTRA FINE FINISH WHERE MARKED STANDARD DROP ARM STAMPING HEAT TREATED TO BRINELL N° 223.269 HEAT TREATMENT TO BE CARRIED OUT BY STAMPERS MATERIAL: 3 1/2% NICKEL STEEL S.9.C No. OFF PER SET: 1 SPECIALLY HEAT TREATED MACHINED ALL OVER GROUND WHERE MARKED TRACED: C.B. CHECKED: APPROVED: A1153 DATE: 28.7.27 TYPE: L. | ||