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 showing wear on six pistons at various points before and after testing.
| Identifier | ExFiles\Box 91\2\ scan0400 | |
| Date | 10th September 1937 | |
| A.{Mr Adams} SIDE. UNIT No P.III No 13. PISTON PROFILES PISTONS E87347 IDENTIFICATION No RR.S.9 PASSED TO TEST 7-5-37 COMPLETED TEST 10-9-37 RUNNING TIME — MILEAGE 17,110 IN FRANCE. TABLE OF MEASUREMENTS: PISTON No | RELIEVED SECTION | BEDDING SECTION ----------|--------------------|---------------- | BEFORE | AFTER | WEAR | BEFORE | AFTER | WEAR 1 A-A | 3.2294 | 3.2309 | +.0015 | 3.2297 | 3.2308 | +.0011 B-B | 3.2330 | 3.2311 | -.0019 | 3.2332 | 3.2340 | +.0008 C-C | 3.2369 | 3.2376 | +.0007 | 3.2370 | 3.2371 | +.0001 D-D | 3.2342 | 3.2351 | +.0009 | 3.2460 | 3.2459 | -.0001 E-E | 3.2428 | 3.2412 | -.0016 | 3.2496 | 3.2487 | -.0009 2 A-A | 3.2298 | 3.2306 | +.0008 | 3.2300 | 3.2304 | +.0004 B-B | 3.2337 | 3.2338 | +.0001 | 3.2338 | 3.2341 | +.0003 C-C | 3.2368 | 3.2367 | -.0001 | 3.2373 | 3.2374 | +.0001 D-D | 3.2345 | 3.2354 | +.0009 | 3.2455 | 3.2460 | +.0005 E-E | 3.2418 | 3.2405 | -.0013 | 3.2493 | 3.2483 | -.001 3 A-A | 3.2299 | 3.2311 | +.0012 | 3.2303 | 3.2304 | +.0001 B-B | 3.2340 | 3.2345 | +.0005 | 3.2342 | 3.2345 | +.0003 C-C | 3.2378 | 3.2377 | -.0001 | 3.2380 | 3.2378 | -.0002 D-D | 3.2347 | 3.2350 | +.0003 | 3.2463 | 3.2466 | +.0003 E-E | 3.2430 | 3.2417 | -.0013 | 3.2512 | 3.2499 | -.0013 4 A-A | 3.2297 | 3.2306 | +.0009 | 3.2298 | 3.2304 | +.0006 B-B | 3.2333 | 3.2340 | +.0007 | 3.2335 | 3.2339 | +.0004 C-C | 3.2370 | 3.2376 | +.0006 | 3.2372 | 3.2373 | +.0001 D-D | 3.2344 | 3.2351 | +.0007 | 3.2458 | 3.2458 | NIL. E-E | 3.2433 | 3.2424 | -.0009 | 3.2505 | 3.2495 | -.001 5 A-A | 3.2307 | 3.2312 | +.0005 | 3.2306 | 3.2310 | +.0004 B-B | 3.2343 | 3.2354 | +.0011 | 3.2343 | 3.2346 | +.0003 C-C | 3.2380 | 3.2379 | -.0001 | 3.2380 | 3.2381 | +.0001 D-D | 3.2351 | 3.2353 | +.0002 | 3.2361 | 3.2459 | -.0002 E-E | 3.2433 | 3.2422 | -.0011 | 3.2500 | 3.2500 | NIL. 6 A-A | 3.2293 | 3.2305 | +.0012 | 3.2294 | 3.2306 | +.0012 B-B | 3.2331 | 3.2340 | +.0009 | 3.2332 | 3.2340 | +.0008 C-C | 3.2369 | 3.2372 | +.0003 | 3.2370 | 3.2376 | +.0006 D-D | 3.2342 | 3.2351 | +.0009 | 3.2462 | 3.2465 | +.0003 E-E | 3.2430 | 3.2425 | -.0005 | 3.2512 | 3.2510 | -.0002 E.X.1219 SHEET 1 Page: 3 | ||