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).
Dimensional measurements of Aerolite piston profiles before and after a 17,000-mile road test.
| Identifier | ExFiles\Box 90\5\ scan0133 | |
| Date | 30th June 1936 | |
| UNIT N.o "B."20. AEROLITE PISTON PROFILES. PRIOR TO & AFTER - 17,000 MILES ROAD TEST. "+" DENOTES AN INCREASE OF DIAMETER "-" DENOTES A DECREASE OF DIAMETER IDENTIFICATION N.o 0.4. [Diagram Labels] RELIEVED PORTION: A, B, C, D, E BEDDING PORTION: A1, B1, C1, D1, E1 [Table of Measurements] PISTON | WHEN MEASURED | A | B | C | D | E | A1 | B1 | C1 | D1 | E1 1. NEW: 3.4807 3.4807 3.4804 3.4828 3.4837 3.4807 3.480 3.4795 3.497 3.4978 AFTER TEST: 3.4812 3.4815 3.4811 3.4843 3.4835 3.4817 3.4807 3.480 3.4967 3.4979 VARIATION: +.0005 +.0008 +.0007 +.0015 -.0002 +.001 +.0007 +.0005 -.0003 +.0001 2. NEW: 3.4805 3.4807 3.4808 3.482 3.482 3.4808 3.4803 3.4802 3.497 3.4978 3. NEW: 3.4816 3.4813 3.4807 3.4825 3.483 3.4819 3.481 3.4798 3.497 3.4978 AFTER TEST: 3.4827 3.4825 3.4816 3.4845 3.483 3.4832 3.4817 3.4801 3.4967 3.4987 VARIATION: +.0011 +.0012 +.0009 +.002 NIL +.0013 +.0007 +.0003 -.0003 +.0009 4. NEW: 3.4812 3.4811 3.4807 3.4829 3.4833 3.4813 3.4803 3.4792 3.497 3.498 AFTER TEST: 3.4825 3.482 3.4814 3.4853 3.4832 3.4825 3.481 3.4794 3.4965 3.4985 VARIATION: +.0013 +.001 +.0007 +.0024 -.0001 +.0012 +.0007 +.0002 -.0005 +.0005 5. NEW: 3.480 3.480 3.480 3.4827 3.4836 3.4802 3.4793 3.4788 3.4971 3.4978 AFTER TEST: 3.481 3.4813 3.4811 3.4858 3.4848 3.4817 3.4809 3.4798 3.4962 3.498 VARIATION: +.001 +.0013 +.0011 +.0031 +.0012 +.0015 +.0016 +.001 -.0009 +.0002 6. NEW: 3.4798 3.4798 3.4798 3.4829 3.4836 3.480 3.4792 3.4787 3.497 3.4978 AFTER TEST: 3.4802 3.4813 3.4802 3.4856 3.4855 3.4817 3.4808 3.4802 3.4957 3.497 VARIATION: +.0004 +.0015 +.0004 +.0027 +.0019 +.0017 +.0016 +.0015 -.0013 -.0008 | ||