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).
Measurement data for Phantom III Unit 9 piston profiles, new and after a 10,000-mile road test.
| Identifier | ExFiles\Box 91\3\ scan0049 | |
| Date | 5th August 1936 | |
| PHANTOM III. UNIT 9. NEW- 25-2-36 AFTER- 5-8-36 PISTON PROFILES NEW & AFTER 10000 MILES ROAD TEST PISTONS:- E.87347. PROFILES TO:- E.87810 MATL:- A/P.404 * DENOTES "A.5" PISTON REPLACED WITH NEW PISTON - (29-4-36) DIMS. GIVEN ARE THOSE OF NEW PISTON. NOTE! + DENOTES AN INCREASE OF ORIGINAL DIMENSION - DENOTES A DECREASE OF ORIGINAL DIMENSION "A" SIDE RELIEVED PORTION | BEDDING PORTION WHEN PISTON, HEAD'S D.{John DeLooze - Company Secretary} | A | B | C | D | E | F | A1 | B1 | C1 | D1 | E1 | F1 1. NEW | 3.230 | 3.235 | 3.238 | 3.235 | 3.2378 | 3.2445 | 3.230 | 3.2352 | 3.2384 | 3.2464 | 3.2488 | 3.249 AFTER | 3.2305 | 3.2353 | 3.2383 | 3.2348 | 3.2378 | 3.2436 | 3.2305 | 3.2353 | 3.238 | 3.2464 | 3.2485 | 3.249 VARIATION | +.0005 | +.0003 | +.0003 | -.0002 | NIL. | -.0009 | +.0005 | +.0001 | -.0004 | NIL. | -.0003 | NIL. 2. NEW | 3.2305 | 3.2355 | 3.2385 | 3.2355 | 3.2385 | 3.245 | 3.2305 | 3.2355 | 3.2385 | 3.2472 | 3.2495 | 3.2502 AFTER | 3.231 | 3.2358 | 3.2385 | 3.2358 | 3.2387 | 3.2437 | 3.2312 | 3.236 | 3.239 | 3.247 | 3.2496 | 3.2503 VARIATION | +.0005 | +.0003 | NIL. | +.0003 | +.0002 | -.0013 | +.0007 | +.0005 | +.0005 | -.0002 | +.0004 | +.0001 3. NEW | 3.2302 | 3.2353 | 3.2385 | 3.2358 | 3.2388 | 3.245 | 3.2302 | 3.2355 | 3.2385 | 3.247 | 3.2495 | 3.2504 AFTER | 3.231 | 3.2357 | 3.2384 | 3.2359 | 3.2388 | 3.2439 | 3.231 | 3.2358 | 3.2383 | 3.247 | 3.2493 | 3.2504 VARIATION | +.0008 | +.0004 | +.0001 | +.0003 | +.0003 | -.0011 | +.0008 | +.0003 | +.0002 | NIL. | -.0002 | NIL. 4. NEW | 3.230 | 3.235 | 3.238 | 3.2355 | 3.239 | 3.2452 | 3.230 | 3.235 | 3.238 | 3.2465 | 3.249 | 3.2503 AFTER | 3.2316 | 3.2362 | 3.2392 | 3.2357 | 3.2388 | 3.2438 | 3.232 | 3.2366 | 3.2393 | 3.2461 | 3.2488 | 3.2498 VARIATION | +.0016 | +.0012 | +.0012 | +.0002 | -.0002 | -.0014 | +.002 | +.0016 | +.0013 | -.0004 | -.0002 | -.0005 5. * NEW | 3.230 | 3.2343 | 3.238 | 3.2348 | 3.2357 | 3.2448 | 3.230 | 3.2343 | 3.238 | 3.2465 | 3.249 | 3.250 AFTER | 3.2332 | 3.2339 | 3.2372 | 3.2343 | 3.2352 | 3.244 | 3.229 | 3.2337 | 3.2371 | 3.2465 | 3.2492 | 3.2505 VARIATION | NIL. | -.0004 | -.0008 | -.0005 | -.0005 | -.0008 | -.001 | -.0006 | -.0009 | NIL | +.0002 | +.0005 6. NEW | 3.230 | 3.2352 | 3.2382 | 3.2353 | 3.2386 | 3.2443 | 3.230 | 3.2352 | 3.2382 | 3.247 | 3.249 | 3.250. AFTER | 3.2307 | 3.2357 | 3.2382 | 3.2357 | 3.2382 | 3.2433 | 3.2307 | 3.2357 | 3.2382 | 3.2466 | 3.249 | 3.250. VARIATION | +.0007 | +.0004 | +.0003 | +.0004 | -.0004 | -.001 | +.0007 | +.0005 | NIL. | -.0004 | NIL. | NIL. "B" SIDE RELIEVED PORTION | BEDDING PORTION WHEN PISTON, HEAD'S D.{John DeLooze - Company Secretary} | A | B | C | D | E | F | A1 | B1 | C1 | D1 | E1 | F1 1. NEW | 3.2303 | 3.2355 | 3.2385 | 3.2355 | 3.239 | 3.2448 | 3.2303 | 3.2355 | 3.2385 | 3.2468 | 3.2492 | 3.2502 AFTER | 3.2313 | 3.236 | 3.2388 | 3.2357 | 3.2386 | 3.2438 | 3.2313 | 3.236 | 3.2384 | 3.2466 | 3.249 | 3.2494 VARIATION | +.001 | +.0005 | +.0003 | +.0002 | -.0004 | -.001 | +.001 | +.0005 | -.0001 | -.0002 | -.0002 | -.0008 2. NEW | 3.2304 | 3.2355 | 3.2385 | 3.2354 | 3.2388 | 3.245 | 3.2304 | 3.2355 | 3.2385 | 3.247 | 3.2495 | 3.2505 AFTER | 3.231 | 3.236 | 3.2388 | 3.236 | 3.2386 | 3.2442 | 3.231 | 3.2361 | 3.239 | 3.247 | 3.2496 | 3.2507 VARIATION | +.0006 | +.0005 | +.0003 | +.0006 | -.0002 | -.0008 | +.0006 | +.0006 | +.0005 | NIL | +.0001 | +.0002 3. NEW | 3.230 | 3.235 | 3.2379 | 3.2355 | 3.239 | 3.2453 | 3.230 | 3.235 | 3.238 | 3.247 | 3.2495 | 3.2503 AFTER | 3.231 | 3.2351 | 3.2388 | 3.236 | 3.240 | 3.2443 | 3.231 | 3.235 | 3.2379 | 3.247 | 3.2497 | 3.2504 VARIATION | +.001 | +.0001 | +.0009 | +.0005 | +.001 | -.001 | +.001 | NIL. | -.0001 | NIL. | +.0002 | +.0001 4. NEW | 3.230 | 3.235 | 3.238 | 3.235 | 3.2378 | 3.2453 | 3.230 | 3.235 | 3.238 | 3.2465 | 3.2488 | 3.2498 AFTER | 3.2293 | 3.234 | 3.2375 | 3.2341 | 3.2371 | 3.2428 | 3.229 | 3.2341 | 3.2378 | 3.2462 | 3.2479 | 3.248 VARIATION | -.0003 | NIL | -.0003 | -.0002 | -.0009 | -.0002 | NIL. | -.0001 | -.0006 | -.0003 | -.0009 | -.0008 5. NEW | 3.230 | 3.235 | 3.238 | 3.2353 | 3.2386 | 3.2442 | 3.230 | 3.235 | 3.2382 | 3.247 | 3.2494 | 3.2504 AFTER | 3.230 | 3.235 | 3.238 | 3.2352 | 3.2381 | 3.2431 | 3.230 | 3.235 | 3.2379 | 3.247 | 3.2495 | 3.2502 VARIATION | NIL. | NIL. | NIL. | -.0001 | -.0005 | -.0011 | NIL. | NIL. | -.0003 | NIL. | +.0001 | -.0002 6. NEW | 3.230. | 3.2355 | 3.2385 | 3.2352 | 3.2385 | 3.2448 | 3.230 | 3.2355 | 3.2383 | 3.2472 | 3.2496 | 3.2502 AFTER | 3.2307 | 3.236 | 3.2388 | 3.2358 | 3.2387 | 3.2437 | 3.2307 | 3.2358 | 3.2382 | 3.247 | 3.2496 | 3.250 VARIATION | +.0007 | +.0005 | +.0005 | +.0006 | +.0002 | -.0011 | +.0007 | +.0003 | -.0001 | -.0002 | +.0001 | -.0002 | ||