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).
Table of mean diameter measurements for the bore of 25 HP steering cams.
| Identifier | ExFiles\Box 153\2\ scan0043 | |
| Date | 3rd June 1936 guessed | |
| BORE OF 25 H.P. STEERING CAMS. Cam No. Mean dia. at the two ends of cam. Cam No. Mean dia. at the two ends of cam. 1 1.1248 1.1256 25 1.1255 1.1257 2 1.1254 1.1252 26 1.1260 1.1255 3 1.1252 1.1255 27 1.1260 1.1262 4 1.1250 1.1253 28 1.1255 1.1258 5 1.1257 1.1248 29 1.1260 1.1258 6 1.1260 1.1258 30 1.1255 1.1258 7 1.1254 1.1260 31 1.1258 1.1254 8 1.1258 1.1254 32 1.1262 1.1265 9 1.1262 1.1261 33 1.1260 1.1260 10 1.1258 1.1256 34 1.1245 1.1250 11 1.1260 1.1263 35 1.1255 1.1255 12 1.1259 1.1263 36 1.1252 1.1254 13 1.1258 1.1258 37 1.1254 1.1254 14 1.1267 1.1262 38 1.1257 1.1255 15 1.1259 1.1256 39 1.1253 1.1253 16 1.1259 1.1260 40 1.1260 1.1254 17 1.1244 1.1248 41 1.1260 1.1260 18 1.1265 1.1261 42 1.1265 1.1265 19 1.1260 1.1264 43 1.1256 1.1255 20 1.1265 1.1268 44 1.1265 1.1262 21 1.1262 1.1254 45 1.1258 1.1255 22 1.1255 1.1255 46 1.1265 1.1264 23 1.1265 1.1263 47 1.1258 1.1258 24 1.1270 1.1270 | ||