Data sheet detailing power requirements and thrust measurements for a Goshawk 4-blade fan with an experimental modification.
| Identifier | ExFiles\Box 75\3\ scan0216 | |
| Date | 4th January 1925 | |
| X4237 POWER REQUIRED TO DRIVE RADIATOR FAN IN VARIOUS CIRCUMSTANCES. No. 21 Circumstances :- Goshawk(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 4 blade fan with 2ND Experimental modification Date, Motor Field current (amps.), Motor Speed., Fan Speed. R. {Sir Henry Royce} , Ratio., Volts across motor brushes., Motor armature Current., Volts across motor brushes light., Motor Armature current light., Thrust (lbs). 4-1-25, 1.492, 440, 1,000, 2.27, 63.94, 4.60, 61.89, 1.90, 1.094 4-1-25, 1.492, 616, 1,400, 2.27, 88.80, 5.59, 87.47, 1.97, 2.312 4-1-25, 1.492, 792, 1,800, 2.27, 114.07, 6.95, 111.0, 1.96, 4.000 4-1-25, 1.492, 971, 2,200, 2.27, 140.15, 9.41, 137.08, 2.06, 6.562 4-1-25, 1.492, 1,161, 2,600, 2.24, 166.14, 11.05, 162.45, 2.10, 8.750 | ||
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).