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).
Specification sheet detailing the particulars of two different fans, the Phantom III and the Cadillac.
| Identifier | ExFiles\Box 155\1\ scan0254 | |
| Date | 4th September 1936 guessed | |
| Particulars of Fans. Ph. III Fan. (1) No. blades 4 (2) Dia. of tip circle. 20" (3) Dist. of forward tips from matrix 1¾" (4) " " rear " engines 3" (5) Depth of blade (approx.) 1¾" (6) Width " " 3½" (7) Fan speed engine speed ratio .89 : 1 Cadillac. (1) No. blades 5 (2) Dia. of tip circle 20" (3) Dist. of forward tips from matrix 1¾" (4) " " rear " engine. 4 (5) Depth of blade. (approx.) 2½" (6) Width " " 3½" (7) Fan speed/engine speed ratio .89 : 1 | ||