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).
Minimal effect of leaded fuel on chassis units and concluding against the need for nickel coating.
| Identifier | ExFiles\Box 150\1\ scan0290 | |
| Date | 1st April 1937 | |
| To By. {R.W. Bailey - Chief Engineer} 1282 Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 4/JH.1.4.37. Lead Fuel effect on Chassis Units. In reply to your memo. By.7/G.25.3.38. and the sample of aero (R.R.56) oiler cap which has been attacked by the lead fuel, the chassis unit is almost entirely free from this trouble so far as we can ascertain. Enquiries from the repair, show that out of all the cars they have recently dealt with, only one unit had to have its oilers replaced through some form of corrosion. We submit an oiler which has been removed from 22-G-V after 35,000 miles on lead fuels and like the remainder is in very good condition. The analysis of the deposit in the crankpins on this particular unit was found to contain 22% of a lead substance and yet there is no attack which indicates that the condition of the aero engine and the chassis unit are not comparable. In view therefore of the negligible amount of trouble experienced on the chassis unit and the cost of nickel coating, this process does not warrant its inclusion. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||