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).
Log of experiments conducted on the 40/50HP chassis.
| Identifier | ExFiles\Box 69\3\ scan0345 | |
| Date | 31th August 1925 guessed | |
| 40/50HP Chassis Experiments. Date issued. Title. Drg:No. Authority. 14.11.25. Piston 4½ to 1 comp: similar to std:E.73376. E.74386. Exptl:Dept:'s request. 6.11.25. Piston 5.2 to 1 comp: concave top. E.74380. Exptl:Dept:'s request. 28.10.25. Piston 4 to 1 comp: Gudgeon Pin mounted in steel pedestals. E.74367/71. R5/M.15.10.25. Scheme 707. 23.10.25. Rocker Shaft Centre Pedestal to prevent binding of Adj:Screw. E.74353/6. BY's Instructions 20.10.25. Tension springs on Magneto Control similar to LeC. E.74341/2/3. Exptl:Dept:'s request. Hs{Lord Ernest Hives - Chair}/RM.{William Robotham - Chief Engineer} 17.10.25. Improved rear Silencer. (Extra expansion chamber.) E.74329 to E.74339. LeC.2153. 16.10.25. Louvred bonnet. (7-EX). "Isotta" type. E.74319 to E.74324. "N" Scheme 2064. 3.9.25. Louvred Bonnet. (7-EX). "Hispano" Type. E.74232 to E.74251. "N" Scheme 2037. 15.10.25. Main Bearing Caps in Duralumin. E.74325/6/7/8. R2/M.13.10.25 1.10.25. Control Ball with .218 stem in place of std: .187 E.74278 to E.74281. LeC.2118. 1.10.25. Increased capacity filter for ignition Gov: Oil Supply. Scheme 699. Exptl:Dept:'s request. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 29.9.25. White metal glands for Inlet and Exhaust Valve Stems. E.74294 to E.74298 for Scheme 695. E.74302 to E.74307 for Scheme 698. Mr Bailey's instructions. 28.9.25. Modifications to Bottom Water Connections to give improved Accelerator Control clearance. E.74300/1. Mr Bailey's instructions. 24.9.25. Radiator Susp:Sphere with white metalled bore. E.74292. E1/M.16.9.25. 8.9.25. Dowelled Slipper Flywheels. E.74259/61. LeC.2131. 29.8.25. Piston Gudgeon Pin Locking details similar to Silver Ghost experiments. E.74211.)Sch: E.74212.)No.1. E.74213.)Sch: E.74214.)No. E.74215.) 2. E.74216.)Sch: E.74217.)No. E.74220.) 3. LeC.1758 & Hs{Lord Ernest Hives - Chair}'s Ins: 4.9.25. Contd. | ||