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).
Piston profile measurements for unit B.80 Nº3, identification M.30, before and after a 50-hour running test on Aerolite tin coated EB.3916 pistons.
| Identifier | ExFiles\Box 124\1\ scan0120 | |
| Date | 20th May 1939 guessed | |
| Unit Nº B.80 Nº3. PISTON PROFILES. PASSED TO TEST: COMPLETED TEST: RUNNING TIME: 50 HRS. MILEAGE: Pistons: EB.3916. AEROLITE TIN COATED. IDENTIFICATION Nº M.30 TABLE DATA: PISTON Nº | POSITION | RELIEVED SECTION BEFORE | RELIEVED SECTION AFTER | BEDDING SECTION BEFORE | BEDDING SECTION AFTER 1 | A-A | 3.4802 | 3.4806 | 3.4802 | 3.4817 1 | B-B | 3.480 | 3.4804 | 3.4801 | 3.4808 1 | C-C | 3.480 | 3.4803 | 3.480 | 3.480 1 | D-D | 3.4811 | 3.4819 | 3.4952 | 3.4996 1 | E-E | 3.4841 | 3.4836 | 3.4995 | 3.5015 2 | A-A | 3.4825 | 3.4828 | 3.4822 | 3.4834 2 | B-B | 3.4822 | 3.483 | 3.482 | 3.4825 2 | C-C | 3.481 | 3.4815 | 3.482 | 3.4821 2 | D-D | 3.4822 | 3.4817 | 3.4952 | 3.4953 2 | E-E | 3.484 | 3.4838 | 3.499 | 3.501 3 | A-A | 3.4823 | 3.4834 | 3.4822 | 3.4836 3 | B-B | 3.4822 | 3.4829 | 3.4822 | 3.4823 3 | C-C | 3.4802 | 3.4809 | 3.482 | 3.482 3 | D-D | 3.481 | 3.4816 | 3.4955 | 3.4959 3 | E-E | 3.4831 | 3.4825 | 3.4995 | 3.5022 4 | A-A | 3.4802 | 3.4812 | 3.4805 | 3.4817 4 | B-B | 3.480 | 3.4807 | 3.4805 | 3.4808 4 | C-C | 3.480 | 3.4802 | 3.4805 | 3.4804 4 | D-D | 3.4811 | 3.4812 | 3.4952 | 3.4956 4 | E-E | 3.484 | 3.4841 | 3.4992 | 3.5009 5 | A-A | 3.480 | 3.4806 | 3.480 | 3.4813 5 | B-B | 3.480 | 3.481 | 3.480 | 3.4805 5 | C-C | 3.480 | 3.4808 | 3.480 | 3.4795 5 | D-D | 3.481 | 3.482 | 3.4955 | 3.4958 5 | E-E | 3.484 | 3.4835 | 3.4991 | 3.5009 6 | A-A | 3.481 | 3.4825 | 3.481 | 3.4824 6 | B-B | 3.481 | 3.4824 | 3.481 | 3.4818 6 | C-C | 3.4805 | 3.4815 | 3.481 | 3.4813 6 | D-D | 3.481 | 3.4815 | 3.495 | 3.4958 6 | E-E | 3.485 | 3.4845 | 3.4991 | 3.5015 7 | A-A | 3.479 | 3.4792 | 3.4788 | 3.4798 7 | B-B | 3.4785 | 3.4795 | 3.4788 | 3.479 7 | C-C | 3.4783 | 3.479 | 3.4783 | 3.4785 7 | D-D | 3.481 | 3.4817 | 3.495 | 3.4953 7 | E-E | 3.483 | 3.4827 | 3.4995 | 3.5008 8 | A-A | | | | 8 | B-B | | | | 8 | C-C | | | | 8 | D-D | | | | 8 | E-E | | | | | ||