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).
Test results for five sample oil coolers (PH III) with improved soldering and longer tube bulges.
| Identifier | ExFiles\Box 131\5\ scan0016 | |
| Date | 10th November 1937 guessed | |
| RESULTS OF TESTS ON FIVE SAMPLE OIL COOLERS. (PH III) WITH IMPROVED SOLDERING AND LONGER TUBE BULGES. TABLE DATA: COLUMN HEADERS: OIL COOLER TESTED TEST No I: - PRESSURE (MAX) DURING TEST LBS/□" - NO. OF PRESS. RISES TEST NO. 2: - MAX. PRESS. REACHED WITHOUT FAILURE (PRESS. RAISED 50LBS/□ AT A TIME) LBS/□" - TIME HELD AT THIS PRESS. (MINUTES) - PRESS AT WHICH FAILURE OCCURRED (LBS/□") - TIME HELD AT THIS PRESS BEFORE FAILURE (MINUTES) - POSITION OF FAILURE (SEE DIAGRAM BELOW) REMARKS ON TESTS AND FAILURES ROW 1: - COOLER TESTED: No. 1 - PRESSURE (MAX): 200 - NO. OF PRESS. RISES: 1000 - MAX. PRESS. REACHED: NOT TESTED - TIME HELD: NOT TESTED - PRESS AT FAILURE: NOT TESTED - TIME BEFORE FAILURE: NOT TESTED - POSITION OF FAILURE: NOT TESTED - REMARKS: COOLER ONLY TESTED ON TEST No1. THEN FITTED ON TEST BED FOR CONTINUED RUNNING. ROW 2: - COOLER TESTED: No. 2 - PRESSURE (MAX): 200 - NO. OF PRESS. RISES: 1000 - MAX. PRESS. REACHED: 300 - TIME HELD: 3 - PRESS AT FAILURE: 350 - TIME BEFORE FAILURE: 1 - POSITION OF FAILURE: POINT A ROW 3: - COOLER TESTED: No. 3 - PRESSURE (MAX): 200 - NO. OF PRESS. RISES: 1000 - MAX. PRESS. REACHED: (a) 200, (b) 350 - TIME HELD: 3, 3 - PRESS AT FAILURE: 250, 400 - TIME BEFORE FAILURE: 1, 1 - POSITION OF FAILURE: POINT C, POINT A - REMARKS: COOLER COMMENCED TO LEAK AT 250 LBS/□' AT MINUTE PORE IN BOTTOM PLATE (C). TEST CONTINUED UP TO 400LBS/□' FOR SOLDER FAILURE. ROW 4: - COOLER TESTED: No. 4 - PRESSURE (MAX): 200 - NO. OF PRESS. RISES: 1000 - MAX. PRESS. REACHED: 350 - TIME HELD: 3 - PRESS AT FAILURE: 400 - TIME BEFORE FAILURE: 1/2 - POSITION OF FAILURE: POINT A ROW 5: - COOLER TESTED: No. 5 - PRESSURE (MAX): 200 - NO. OF PRESS. RISES: 1000 - MAX. PRESS. REACHED: 350 - TIME HELD: 3 - PRESS AT FAILURE: 400 - TIME BEFORE FAILURE: 1 - POSITION OF FAILURE: POINT B - REMARKS: TUBE COLLAPSED INSIDE COOLER AND ALLOWED PRESSURE TO TEAR SOLDER BOND. DIAGRAM TEXT: INVERTED PLAN POINT 'C' POINT 'B' POINT 'A' (JUNCTION OF DIVISION PLATE AND BOTTOM PLATE) | ||