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).
Inspection report detailing wear measurements for a distributor, cylinders, valve guides, and valves.
| Identifier | ExFiles\Box 72\4\ scan0216 | |
| Date | 25th September 1924 guessed | |
| (4) Distributor. Points unevenly worn and badly burred. Tower very dry on spigot causing advance and retard action to be very heavy. Cylinders. Condition very fair, sizes of bores as follows :- | | 1 | 2 | 3 | 4 | 5 | 6 | Drawing dim | |---|---|---|---|---|---|---|---| | Mouth | 4.501 | 4.502 | 4.5025 | 4.501 | 4.501 | 4.501 | 4.500 | | Centre | 4.505 | 4.506 | 4.5075 | 4.5055 | 4.505 | 4.505 | " | | Crown | 4.503 | 4.5045 | 4.506 | 4.505 | 4.5035 | 4.503 | " | | Average | 4.503 | 4.504 | 4.505 | 4.503 | 4.503 | 4.503 | " | | Var. | .004 | .004 | .005 | .0045 | .004 | .004 | " | Perhaps you would let us have your views as to whether they should be re-ground. Valve Guides - Inlet. Inlet Guides worn eliptical at the bottom of guides from .0015 to .0012. Valve Guides - Exhaust. No 1 Wear at top .007 at bottom .010. No 2 " " " .007 " " .009. No 3 " " " .007 " " .009. No 4 " " " .006 " " .009. No 5 " " " .006 " " .010. No 6 " " " .005 " " .008. Worn eliptical at the bottom of guides. Valves - Inlet. No 1 Wear on stem where shaded .001. No 2 " " " " " .0005 to .0015. No 3 " " " " " .0005. No 4 " " " " " .001 to .002. No 5 " " " " " .0005 to .0015. No 6 " " " " " .001. Slightly eliptical. Valves - Exhaust. No 1 Wear on stem where shaded .002. burnt No 2 " " " " " .0035 " No 3 " " " " " .002 to .005 " No 4 " " " " " .002 to .005 badly burnt. No 5 " " " " " .001 to .002 burnt. No 6 " " " " " .001 to .0025 " Image Note: NOTE A RECESS HAS BEEN WORN AT THIS POINT DUE TO WASHER ON ALL VALVES 1.250 to 1.500 | ||