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).
Graph comparing the speed, power, and axial thrust of a Standard Type 3A and an Experimental Type 10A EAC fan.
| Identifier | ExFiles\Box 75\3\ scan0071 | |
| Date | 10th February 1925 guessed | |
| 3A STD. TYPE EAC. 10A EXPL. TYPE EAC. FAN SPEED (RPM) MOTOR OR ENGINE POWER REQUIRED TO DRIVE FAN (HP) AXIAL THRUST OF FAN IN LBS WEIGHT SPEED POWER 10A 3A 1445 Legend: • 10 x 15B □ 15C ⊗ 16B ⊞ 16Z ⊕ 16c * 16d ◊ 16d (full case) ∆ 15A CAP | ||