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).
Blueprint detailing a cracked magnesium lower crankcase half, showing inverted and plan views with analysis.
| Identifier | ExFiles\Box 132\3\ scan0068 | |
| Date | 23th February 1937 | |
| PH.III. UNIT No II. CRACKED CRANKCASE LOWER HALF. PRODUCED IN MAGNESIUM. .310" 1.00" .550" .200" .900" .250" LARGE CRACK RIGHT THROUGH BOTTOM OF CASING. INVERTED PLAN CRANKCASE LOWER HALF No E 86979 FITTED 30-1-36 THE CRACK SHOWN ABOVE HAS NOT BEEN MADE BY ANY EXTERNAL FORCE OR SHOCK BUT SEEMS TO BE A CASTING-CRACK WHICH HAS BEEN AGGRAVATED AND DEVELOPED BY ENGINE VIBRATION ETC. PLAN VIEW FLANGE SHOWN CUT AWAY TO SHOW CRACK. HAS COMPLETED A TOTAL OF 34 HRS. RUNNING INCLUDING 12 HRS. AT FULL THROTTLE. HAS RUN 18,469 MILES IN 36EX. ExI.131. ROLLS-ROYCE, LTD. PRINT ROOM. 23 FEB 1937 DERBY. CRW / 25.2.37 | ||