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 test report for a Wraith 25.G.V1. comparing a standard carburettor with one using a separate idle feed.
| Identifier | ExFiles\Box 147\5\ scan0128 | |
| Date | 14th June 1937 | |
| To Rm.{William Robotham - Chief Engineer} J 1249 14.6.37 WRAITH 25.G.V1. We have just run 2 petrol consumption runs from Derby to Buxton and return on the above car with (1) Standard carb. fitted and (2) Carb. with separate idle feed fitted. we obtained the following figures:- Mileage Ave.speed Petrol used Petrol Cons. Standard carb. 71 47.5 M.P.H. 5 gal. 4 pts. 13 MPG. Carb with separate 71 47.5 " 5 " 2¾ " 13.28 " idle feed. Rm{William Robotham - Chief Engineer}/Whym. | ||