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).
Revised specification for 'S.S.' Unit No.11.
| Identifier | ExFiles\Box 169\1\ img020 | |
| Date | 13th June 1929 | |
| RHC{R. H. Coverley - Production Engineer}/FW4/MS13.6.29. "S.S." Unit No.11. We give below Revised specification of above Unit. Passed to Test (fitted in 23-EX) May 18th, 1929. Crankcase & Bearings - L.O.P. E.78560. (1) Crankcase modified to E.78775 to suit increased Vacuum Pump using existing Bearings etc. (2) (L.H.) C'case modified to accommodate Silencer Bracket t- N.S.2823. (3) Rear End Covers E.77432/3 with Oil groove and 3 Drain Holes added to lower half only. Crankshaft - L.O.P. E.78558. Single Oil Flinger type Crankshaft. Spring Drive - L.O.P. E.78554 - Sch.1103. Standard S. Drive with 10" Slipper Wheels. Connecting Rods - L.O.P. E.74490. "H" Section. Piston - L.O.P. E.78563. Existing Pistons E.78440 modified for increased Oil Holes to V.645 & fitted with 6 Perfect Circle Rings with narrower scraping edge. Cylinders - L.O.P. E.78949 - Sch.1101-2-LeC 2651. 4 Thumb Screw type Rocker Cover E.78792 to LeC 2651. Valves & Fittings - L.O.P. E.77652 - Sch.1101. Valve Springs E.78071. Rocker Shafts flatted to V.453. Oil Restriction Plugs in Rockers to V.410. | ||