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).
Data table showing the amount of petrol not drawn from a 33-gallon tank under different gradients and cambers.
| Identifier | ExFiles\Box 95\4\ scan0191 | |
| Date | 20th December 1935 | |
| -2- Re/Sym.17/EW.20.12.35. 33-Gallon Tank. Petrol not drawn from Tank. Tank on level 6 pts. 1 in 10 upward gradient 1 gall. 7 pts. 1 " 8 " 2 galls. 2 pts. 1 " 5 " 3 galls. 4 pts. Tank in position of N/S Camber of 1 in 10. Level 1 gall. 6 pts. 1 in 10 upward gradient 3 galls. 1 pt. 1 " 8 " " 3 galls. 4 pts. 1 " 5 " " 4 galls. 5 pts. Tanks in position of o/s Camber of 1 in 10. Level 1 gall. 2 pts. 1 in 10 upward gradient 2 galls. 0 pts. 1 in 8 " " 2 galls. 3 pts. 1 " 5 " " 3 galls. 3 pts. | ||