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).
Appendix page comparing the weight and capacity calculations for Continental B.5. and Bentley Cresta tanks.
| Identifier | ExFiles\Box 111\4\ scan0127 | |
| Date | 26th January 1939 guessed | |
| -2- APPENDIX. Continental B.5. Tank - useful capacity = 18 galls - actual 19.750 Bentley Cresta " " = 22 galls - " 23.750 For a given length of tank the following is approx. true: (a) End area is proportional to the capacity. (b) The periphery is proportional to sq.root of capacity. Weight of B.5. Continental Tank. End plates & baffles = 187 x 4 x .024 x .280 = 5.05 lbs. Tank body. = 54 x 30.5 x .036 x .028 = 16.30 lbs. _________ Total = 21.35 lbs. _________ Weight of Cresta 22 gall. Tank. End plates & baffles = 23.75/19.75 x 5.05 = 6.08 lbs. Tank body. = (23.75/19.75)½ x 16.30 = 17.40 lbs. _________ Total 23.48 lbs. _________ Increase in weight for 4 galls. = 2.13 lbs. Increase per cent in weight = 10% Increase in capacity = 22.2% Ev.{Ivan Evernden - coachwork} | ||