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).
Page of engineering calculations involving multiple variables and units of square feet.
| Identifier | ExFiles\Box 5\2\ 02-page130 | |
| Date | 1st December 1927 guessed | |
| contd :- -2- and k²y = 21.06 - .1665 = 20.89 ft² ab = 6.083 X 4.708 = 28.64 ft² k²y/ab = .730 He/S.S.Tresilian. | ||