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).
Blueprint detailing the design, angles, and cross-section of a blade.
| Identifier | ExFiles\Box 75\3\ scan0012 | |
| Date | 29th October 1924 guessed | |
| 8 TO 10 S.W.G. BLADE SECTION TWICE FULL SIZE. BEND WITH CENTRE LINE ON ARC OF 1 IN 20. 10.875 R.{Sir Henry Royce} 20. TRAILING EDGE. 2 1/4". SWEEP BACK 1 IN 10. TRY ALSO 1 IN 15 & 1 IN 20. IF IT BE DECIDED TO HAVE A CONSTANT ANGLE DOWN THE BLADE, USE 30°. BEST BLADE ANGLES. 37°. 32°. 27°. 22°. 4.875R. 6.875R. 8.875R. 10.875R. | ||