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).
Petrol consumption tests for the Wraith 29.G.VI model.
| Identifier | ExFiles\Box 147\5\ scan0147 | |
| Date | 19th February 1938 | |
| 1249 To By.{R.W. Bailey - Chief Engineer} c. to Mx.{John H Maddocks - Chief Proving Officer} Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe}4/JH.19.2.38. WRAITH 29.G.VI. PETROL CONSUMPTION TESTS. (1) 30 HP. war 22.G.VI and 29.G.VI. run together for 200 miles full throttle. CAR PETROL. TYRES. AXLE RATIO. AV SPEED CASTROL XL 2100 mpg 29.G.VI 12.2 m.p.g. 17" x 6.50" 9 x 41 47 M.P.H. 22.G.VI. 13.2 m.p.g. 19" x 6" 11 x 50 47 m.p.h. (2)29.G.VI. 13.7 m.p.g. 17" x 6.50 9 x 41 45 m.p.h. 72 miles. 29.G.VI. 14.4 m.p.g. 19" x 6.50 " " " (3) " 16.2 M.P.G. 17" x 6.50 9 x 41 35 M.P.H. 72 miles. " 16.7 M.P.G. 19" x 6.50 " " " Rm{William Robotham - Chief Engineer}/GR.{George Ratcliffe} | ||