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 dimensions for the Spectre 5 unit, showing measurements before and after testing.
| Identifier | ExFiles\Box 91\4\ scan0281 | |
| Date | 3rd October 1935 | |
| SPECTRECodename for Phantom III. (5). UNIT. PISTON DIMENSIONS E86672 - A/P - * DENOTES AFTER 57 HOURS TEST BED RUNNING AND 20000 MILES ROAD TEST IN FRANCE. Handwritten note in red: New Pistons fitted for this test as others were returned for alterations. TABLE OF PISTON DIMENSIONS Headers: RELIEVED, BEDDING, RELIEVED Diagram Labels: RELIEVED POSITIONS, BEDDING POSITIONS Columns: PISTON, WHEN MEASURED, A, B, C, D, E, F, G PISTON A1: NEW: 3.236, 3.242, 3.240, 3.247, 3.2495, 3.246, 3.244 *: 3.236, 3.241, 3.240, 3.246, 3.2485, 3.246, 3.24675 VARIATION: -, -001, -, -001, -001, -, +00275 PISTON A2: NEW: 3.236, 3.243, 3.241, 3.2465, 3.248, 3.2485, 3.244 *: 3.235, 3.24125, 3.239, 3.2455, 3.2485, 3.2475, 3.24425 VARIATION: -001, -00175, -002, -001, +0005, -001, +00025 PISTON A3: NEW: 3.237, 3.2425, 3.2408, 3.2465, 3.245, 3.248, 3.2435 *: 3.236, 3.2395, 3.240, 3.246, 3.24775, 3.24475, 3.247 VARIATION: -001, -003, -0008, -0005, +00275, -00325, +0035 PISTON A4: NEW: 3.2355, 3.242, 3.240, 3.247, 3.2475, 3.243, 3.2435 *: 3.23575, 3.2425, 3.240, 3.244, 3.2465, 3.244, 3.24125 VARIATION: +00025, +0005, -, -003, -001, +001, -00225 PISTON A5: NEW: 3.236, 3.243, 3.240, 3.247, 3.2475, 3.246, 3.244 *: VARIATION: DAMAGED BY VALVE PISTON A6: NEW: 3.237, 3.243, 3.2408, 3.2465, 3.248, 3.245, 3.244 *: 3.23575, 3.24225, 3.240, 3.246, 3.248, 3.24425, 3.2415 VARIATION: -00125, -00075, -0008, -0005, -, -00075, -0025 PISTON B1: NEW: 3.2365, 3.2425, 3.241, 3.247, 3.248, 3.2455, 3.244 *: 3.235, 3.2425, 3.23975, 3.246, 3.247, 3.246, 3.24425 VARIATION: -0015, -, -00125, -001, -001, +0005, +00025 PISTON B2: NEW: 3.236, 3.243, 3.240, 3.247, 3.246, 3.246, 3.2445 *: 3.235, 3.24175, 3.23925, 3.246, 3.248, 3.24575, 3.2455 VARIATION: -001, -00125, -00075, -001, +002, -00025, +001 PISTON B3: NEW: 3.236, 3.2435, 3.2405, 3.2465, 3.2475, 3.2455, 3.2425 *: 3.2355, 3.238, 3.2395, 3.2435, 3.24475, 3.244, 3.24175 VARIATION: -0005, -0045, -001, -003, -00275, -0015, -00175 PISTON B4: NEW: 3.2365, 3.242, 3.2395, 3.247, 3.248, 3.246, 3.2435 *: 3.23475, 3.24225, 3.2392, 3.245, 3.24725, 3.2445, 3.247 VARIATION: -00175, +00025, -0003, -002, -00075, -0015, +0035 PISTON B5: NEW: 3.236, 3.243, 3.2395, 3.2465, 3.248, 3.246, 3.244 *: 3.23575, 3.242, 3.23925, 3.246, 3.24725, 3.2445, 3.244 VARIATION: -00025, -001, -00025, -0005, -00075, -0015, - PISTON B6: NEW: 3.2365, 3.243, 3.2395, 3.247, 3.2475, 3.2455, 3.244 *: 3.236, 3.2425, 3.23925, 3.246, 3.247, 3.24475, 3.2465 VARIATION: -0005, -0005, -00025, -001, -0005, -00075, +0025 Stamp: ROLLS-ROYCE, LTD. PRINT ROOM OCT 5 1935 DERBY. | ||