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).
Notification to replace a relief valve governor spring for the Phantom II and 20/25 HP chassis.
| Identifier | ExFiles\Box 151\2\ scan0173 | |
| Date | 6th February 1934 | |
| c. Hs {Lord Ernest Hives - Chair} /Les. X4698 BY {R.W. Bailey - Chief Engineer} /HEB {H. Biraben} 7/M.6.2.34. PHANTOM II. & 20/25 HP. CHASSIS. GOVERNOR CONTROL FOR DAMPERS SEC:7163. Please receive herewith three Blue Prints of the following:- F.86018 Spring(Relief Valve)Governor. 1 off, replacing F.85531. This Spring takes a pressure of 45 lbs. per sq.inch, instead of 30, which is the pressure which the present spring F.85531 takes. Kindly produce and fit on Expl: Chassis. BY {R.W. Bailey - Chief Engineer} /HEB. {H. Biraben} AEH2 | ||