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).
Loss of horsepower in the Phantom II American Chassis & N. Series.
| Identifier | ExFiles\Box 92\2\ scan0103 | |
| Date | 23th January 1931 | |
| Hs.{Lord Ernest Hives - Chair} C. Wor.{Arthur Wormald - General Works Manager} EP{G. Eric Platford - Chief Quality Engineer}10/H23.1.31. re. PHANTOM II. AMERICAN CHASSIS & N. SERIES. LOSS OF H.P. With reference to the discussion with Rm.{William Robotham - Chief Engineer} re above. As requested, I give particulars below. Four of the above cars tested so far on Chassis dynamometer. The average H.P. on road wheels is less than the average present standard by the amounts stated:- Eng.Revs. 1750. 2000. 2250. 2500. 2750. 3000. Less BHP. 1. 2 3 3½ 4 5 The chief cause of the loss is the carburetter inlet silencer, aggravated by the gauze becoming dirty or oil lagged. Suggest larger area. On road tests taken there is no appreciable loss in performance. The suction noise is certainly much quieter. EP.{G. Eric Platford - Chief Quality Engineer} | ||