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 ring clearance measurements for Unit No PH III 13 'A' side.
| Identifier | ExFiles\Box 91\2\ scan0404 | |
| Date | 10th September 1937 | |
| 5 PASSED TO TEST:- 7-5-37 COMPLETED TEST:- 10-9-37 UNIT NO PH III 13 'A' SIDE PISTON RING CLEARANCES Pistons E.B.7347 1ST & 2ND RINGS E.B. 1494 MatL YC (BRICO) SCRAPER RING E.B. 2686 MatL YC (BRICO) RUNNING TIME:- -- MILEAGE:- 17,110 TABLE DATA (All measurements taken 'After' testing): PISTON NO, RING NO, PISTON GROOVE, RING THICKNESS, CLEARANCE 1, 1, .101, .096, .005 1, 2, .100, .0975, .0025 1, 3, .1785, .1768, .0017 2, 1, .1015, .0955, .006 2, 2, .100, .0978, .0022 2, 3, .179, .1768, .0022 3, 1, .101, .095, .006 3, 2, .1005, .0975, .003 3, 3, .179, .1765, .0025 4, 1, .1015, .0953, .0062 4, 2, .1005, .0974, .0031 4, 3, .179, .177, .002 5, 1, .1015, .095, .0065 5, 2, .1005, .0978, .0027 5, 3, .1785, .1765, .002 6, 1, .1015, .095, .0065 6, 2, .1005, .0975, .003 6, 3, .179, .1768, .0022 Ex I 220 SHEET 1. | ||