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).
Comparing the weight of various coachwork parts between two models.
| Identifier | ExFiles\Box 117\2\ scan0187 | |
| Date | 24th January 1940 | |
| To Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}5/BA.24.1.40. 1 - R - 1. Coachwork. Owing to the increased weights over 12.B.V. Coachwork, we have endeavoured to trace the heavy parts, by weiging the removable sections and comparing the weights. Our conclusions are that the extra weight of 71 lbs. must lie in the body shell, wings and small running boards as we can only account for an additional 23 lbs shown below :- Article. | 1.R.1. | 12.B.V. | Difference. ----------------|----------|----------|---------------- Door. O.S.F. | 56 lbs. | 55 lbs. | + 2 per set. " O.S.R. | 47 lbs. | 41.5 " | + 11 " " Front Seats.N.S.F.| 34.5 " | 35 " | - 1 " " " " O.S.F.| 35 " | 31 " | + 8 " " Rear Seat. | 25.5 " | 22.5 " | + 3 " " Difference - 1 - R - 1. = 23 lbs. heavier. Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} | ||