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 profile measurements before and after a test, showing wear data.
| Identifier | ExFiles\Box 91\2\ scan0401 | |
| Date | 10th September 1937 | |
| 3 "B."SIDE. UNIT NO PH. III. NO 13 PISTON PROFILES PISTONS E.87347. IDENTIFICATION NO R.R.S.9. PASSED TO TEST 7-5-37 COMPLETED TEST 10-9-37 RUNNING TIME - MILEAGE 17,110 IN FRANCE. RELIEVED SECTION BEDDING SECTION PISTON NO | RELIEVED SECTION | BEDDING SECTION | BEFORE | AFTER | WEAR | BEFORE | AFTER | WEAR 1 A-A | 3.2300 | 3.2305 | +.0005 | 3.2302 | 3.2305 | +.0003 B-B | 3.2342 | 3.2341 | -.0001 | 3.2340 | 3.2342 | +.0002 C-C | 3.2374 | 3.2376 | +.0002 | 3.2377 | 3.2375 | -.0002 D-D | 3.2348 | 3.2350 | +.0002 | 3.2465 | 3.2465 | NIL. E-E | 3.2432 | 3.2424 | -.0008 | 3.2507 | 3.2510 | +.0003 2 A-A | 3.2297 | 3.2310 | +.0013 | 3.2290 | 3.2306 | +.0016 B-B | 3.2332 | 3.2345 | +.0013 | 3.2333 | 3.2343 | +.001 C-C | 3.2369 | 3.2376 | +.0007 | 3.2370 | 3.2375 | +.0005 D-D | 3.2340 | 3.2348 | +.0008 | 3.2460 | 3.2461 | +.0001 E-E | 3.2428 | 3.2420 | -.0008 | 3.2507 | 3.2506 | -.0001 3 A-A | 3.2299 | 3.2305 | +.0006 | 3.2298 | 3.2305 | +.0007 B-B | 3.2337 | 3.2340 | +.0003 | 3.2337 | 3.2341 | +.0004 C-C | 3.2370 | 3.2373 | +.0003 | 3.2372 | 3.2370 | -.0002 D-D | 3.2340 | 3.2345 | +.0005 | 3.2460 | 3.2452 | -.0008 E-E | 3.2423 | 3.2417 | -.0006 | 3.2498 | 3.2480 | -.0008 4 A-A | 3.2293 | 3.2304 | +.0011 | 3.2295 | 3.2307 | +.0012 B-B | 3.2331 | 3.2342 | +.0011 | 3.2333 | 3.2340 | +.0007 C-C | 3.2368 | 3.2375 | +.0007 | 3.2370 | 3.2376 | +.0006 D-D | 3.2342 | 3.2349 | +.0007 | 3.2460 | 3.2460 | NIL. E-E | 3.2428 | 3.2420 | -.0008 | 3.2498 | 3.2497 | -.0008 5 A-A | 3.2301 | 3.2313 | +.0012 | 3.2300 | 3.2311 | +.0011 B-B | 3.2338 | 3.2345 | +.0007 | 3.2338 | 3.2345 | +.0007 C-C | 3.2375 | 3.2380 | +.0005 | 3.2377 | 3.2378 | +.0001 D-D | 3.2340 | 3.2345 | +.0005 | 3.2464 | 3.2465 | +.0001 E-E | 3.2420 | 3.2405 | -.0015 | 3.2505 | 3.2502 | -.0003 6 A-A | 3.2298 | 3.2300 | +.0002 | 3.2298 | 3.2300 | +.0002 B-B | 3.2337 | 3.2338 | +.0001 | 3.2336 | 3.2338 | +.0002 C-C | 3.2372 | 3.2372 | NIL. | 3.2371 | 3.2375 | +.0004 D-D | 3.2340 | 3.2341 | +.0001 | 3.2462 | 3.2450 | -.0012 E-E | 3.2429 | 3.2420 | -.0009 | 3.2510 | 3.2498 | -.0012 EXI 219 SHEET 2. | ||