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).
Specification sheet detailing the measured diameters for new Aerolite pistons and cylinder bores.
| Identifier | ExFiles\Box 94\5\ scan0092 | |
| Date | 12th November 1934 | |
| SPECTRECodename for Phantom III NO. 2 DIAMETERS OF PISTONS AND CYLINDER BORES NEW AEROLITE PISTONS PISTON DIAS. Table 1: Piston Diameters Headers: PISTON REF NO, PISTON UNIT NO, WHEN MEASURED, RING LANDS (A, B, C), SKIRT (D, E, F, G), RING LANDS (H, I, J, K) | PISTON REF NO | PISTON UNIT NO | WHEN MEASURED | A | B | C | D | E | F | G | H | I | J | K | |---------------|----------------|---------------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------|--------| | 1 | 1B | New | 3.2305 | 3.233 | 3.2325 | 3.2322 | 3.2324 | 3.2323 | 3.2323 | 3.232 | 3.2473 | 3.2473 | 3.248 | | 2 | 2B | New | 3.2308 | 3.230 | 3.2302 | 3.2322 | 3.2342 | 3.2315 | 3.231 | 3.231 | 3.2473 | 3.2473 | 3.248 | | 3 | 3B | New | 3.2321 | 3.232 | 3.2322 | 3.2322 | 3.234 | 3.233 | 3.2328 | 3.2325 | 3.2472 | 3.2472 | 3.2479 | | 4 | 4B | New | 3.2312 | 3.2308 | 3.2308 | 3.2324 | 3.2344 | 3.2318 | 3.2312 | 3.2312 | 3.2471 | 3.247 | 3.2473 | | 5 | 5B | New | 3.2309 | 3.2305 | 3.2308 | 3.2328 | 3.2348 | 3.232 | 3.231 | 3.231 | 3.2473 | 3.2473 | 3.2478 | | 6 | 6B | New | 3.2313 | 3.231 | 3.2312 | 3.233 | 3.234 | 3.2323 | 3.2314 | 3.2314 | 3.2473 | 3.2477 | 3.2485 | | 7 | 1A | New | 3.2312 | 3.2312 | 3.2313 | 3.232 | 3.2338 | 3.232 | 3.2315 | 3.2315 | 3.2473 | 3.2474 | 3.248 | | 8 | 2A | New | 3.2315 | 3.2315 | 3.2317 | 3.233 | 3.2338 | 3.232 | 3.232 | 3.2318 | 3.2472 | 3.2473 | 3.2485 | | 9 | 3A | New | 3.232 | 3.2315 | 3.2317 | 3.2328 | 3.2330 | 3.2328 | 3.2318 | 3.232 | 3.2472 | 3.2472 | 3.2482 | | 10 | 4A | New | 3.2318 | 3.2313 | 3.2315 | 3.2326 | 3.2345 | 3.2322 | 3.2318 | 3.2317 | 3.2473 | 3.2475 | 3.2482 | | 11 | 5A | New | 3.2308 | 3.2308 | 3.2306 | 3.2321 | 3.234 | 3.2316 | 3.2318 | 3.2313 | 3.247 | 3.247 | 3.2477 | | 12 | 6A | New | 3.2322 | 3.2322 | 3.2322 | 3.2322 | 3.233 | 3.233 | 3.2326 | 3.2328 | 3.2473 | 3.2473 | 3.2481 | CYLINDER BORES DOC. DIMENSION 3.250 +.01 -.00 DIA. Table 2: Cylinder Bores | CYLINDER | WHEN MEASURED | CROWN | CROWN | CROWN | CENTRE (X) | CENTRE | CENTRE | RUBBER SECTION | RUBBER SECTION | RUBBER SECTION | |----------|---------------|----------------|----------------|---------|----------------|----------------|---------|----------------|----------------|----------------| | | | AA{D. Abbot-Anderson} | BB | OVALITY | AA{D. Abbot-Anderson} | BB | OVALITY | AA{D. Abbot-Anderson} | BB | OVALITY | | 1A | 12 11 34 | 3.2498 | 3.2496 | .0002 | 3.2506 | 3.2502 | .0004 | 3.2488 | 3.2485 | .0003 | | 2A | | 3.250 | 3.2493 | .0007 | 3.2505 | 3.2506 | .0001 | 3.2480 | 3.2485 | .0005 | | 3A | | 3.2496 | 3.2502 | .0006 | 3.2505 | 3.2506 | .0003 | 3.2475 | 3.2475 | - | | 4A | | 3.2498 | 3.2497 | .0001 | 3.2503 | 3.2504 | .0001 | 3.248 | 3.2482 | .0002 | | 5A | | 3.2501 | 3.2502 | .0001 | 3.251 | 3.2512 | .0002 | 3.2476 | 3.2479 | .0003 | | 6A | | 3.2498 | 3.2495 | .0003 | 3.2505 | 3.2507 | .0002 | 3.2478 | 3.2478 | - | | 1B | | 3.2495 | 3.2493 | .0002 | 3.2503 | 3.2505 | .0002 | 3.2488 | 3.2485 | .0003 | | 2B | | 3.2497 | 3.2496 | .0001 | 3.2505 | 3.2507 | .0002 | 3.248 | 3.248 | - | | 3B | | 3.2493 | 3.2495 | .0002 | 3.2503 | 3.2507 | .0004 | 3.2473 | 3.2475 | .0002 | | 4B | | 3.2495 | 3.2492 | .0003 | 3.2505 | 3.2502 | .0003 | 3.2475 | 3.248 | .0005 | | 5B | | 3.2503 | 3.2505 | .0002 | 3.251 | 3.2513 | .0003 | 3.2475 | 3.248 | .0005 | | 6B | | 3.2495 | 3.2498 | .0003 | 3.251 | 3.2508 | .0007 | 3.2482 | 3.2485 | .0003 | Handwritten Note (left margin): 14.15 4.55 Diagram Text: DIAS. PARALLEL WITH GUDGEON PIN BORE DIAS. AT RIGHT ANGLES TO GUDGEON PIN BORE CROWN CENTRE RUBBER JOINT RING SECTION JOINT FACE INLET SIDE EXHAUST SIDE Footer: ROLLS-ROYCE, LTD PRINT R.D/D 13 NOV 1934 DERBY. | ||