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 gap measurements for Unit No Phantom III 13, showing wear after testing.
Identifier | ExFiles\Box 91\2\ scan0407 | |
Date | 10th September 1937 | |
9 UNIT No P.III 13 PASSED TO TEST :- 7-5-37 COMPLETED TEST :- 10-9-37 PISTON RING GAPS 'B' SIDE WORKING GAP FREE GAP COMPRESSION RING 1ST & 2ND E.B. 1494 1/C (Brico) SCRAPER RING E.B. 2686 1/C (Brico) RUNNING TIME :- - MILEAGE :- 17.110 TABLE OF PISTON RING GAPS ------------------------------------------------------------------------------------------------ | PISTON | RING | FREE GAP | WORKING GAP | | No | No |------------------------------------------|-------------------------------------------| | | | BEFORE | AFTER | WEAR | BEFORE | AFTER | INCREASE WEAR | |--------|------|--------|-------|--------|--------|-------|---------------| | 1 | 1 | | | | .006 | .010 | .004 | | | 2 | | | | " | .008 | .002 | | | 3 | | | | " | .010 | .004 | |--------|------|--------|-------|--------|--------|-------|---------------| | 2 | 1 | | | | " | .008 | .002 | | | 2 | | | | " | .008 | .002 | | | 3 | | | | " | .010 | .004 | |--------|------|--------|-------|--------|--------|-------|---------------| | 3 | 1 | | | | " | .010 | .004 | | | 2 | | | | " | .010 | .004 | | | 3 | | | | " | .010 | .004 | |--------|------|--------|-------|--------|--------|-------|---------------| | 4 | 1 | | | | " | .010 | .004 | | | 2 | | | | " | .010 | .004 | | | 3 | | | | " | .010 | .004 | |--------|------|--------|-------|--------|--------|-------|---------------| | 5 | 1 | | | | " | .008 | .002 | | | 2 | | | | " | .010 | .004 | | | 3 | | | | " | .010 | .004 | |--------|------|--------|-------|--------|--------|-------|---------------| | 6 | 1 | | | | " | .010 | .004 | | | 2 | | | | " | .009 | .003 | | | 3 | | | | " | .010 | .004 | ------------------------------------------------------------------------------------------------ Note: The 'Free Gap' columns are blank. The '"' symbol indicates the same value as the cell above (.006). ExI 221 Sheet 2 | ||