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).
Issues and modifications for ignition wires, a fan assembly, and a flywheel and clutch system.
| Identifier | ExFiles\Box 92\3\ scan0276 | |
| Date | 26th January 1937 guessed | |
| ( 9 ) Ignition Wires & Fittings. LOP. E.85451. Existing, complete to above LOP. incorporating:- "Helsby" Cable Ignition Wires. Short circuiting between the leads to A.3 and A.6 inlet plugs, inside the conduit in the vee, occurred after 9,500 miles. Sliding the wires to a different relative position overcame the trouble. The wires were inclined to pull out of the insulated terminals when removing them from the plugs, and the rubber insulation became soft and showed signs of disintegration at these points. Handwritten Note: Wsl - Is this the latest stuff NO Fan. LOP. E.85311. Existing, complete to the above LOP incorporating:- Cadillac Blades fitted, supplied by Rm{William Robotham - Chief Engineer}/Std. Removed after 19,000 miles running. Replaced by five bladed Cadillac type fan with increased size driving belt and modified starting handle bracket. A new belt was required after the first 4,000 miles running, and this rapidly stretched allowing continual slip. The fan bearing became noisy early in the mileage. It was found to be dry. After lubricating and re-fitting, it gave no further trouble. It is claimed that if correctly packed with grease at the beginning, no further attention is required. The new increased size belt stretched considerably during the first 350 miles after fitting, and the adjustment had to be taken up to the limit of its travel. It ran 3,000 miles during which, further stretch occurred. There were no complaints of noise with either fan. Flywheel & Clutch. LOP. G.84357 N.S.4738-4747-4819. Existing, complete to the above LOP. & Schemes incorporating:- G.84810 Driven Plate with V.M.20. .040 Cushioning. Rm.{William Robotham - Chief Engineer}131 Thrust Springs. Rm.{William Robotham - Chief Engineer}169 Deletion of Oilite Bush. I - Ex.25048 Operating Lever with 4.000 centres in connection with 1" extra pedal travel to N.Sch.4938. I2 - G.84969 Cup. I - Hoffmann N° 125 Pilot Bearing in Crankshaft. The smoothness of engagement varied during the mileage. Jaggers were experienced on occasions, and produced transmission rattles with the original rear axle half shafts, but with the new thick half shafts, no rattles occurred when the clutch jaggered. The engagement was very sudden and took place over a (contd) | ||