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).
Performance graph for a Goshawk Blower 144X, plotting coefficients K and η against V/L for various rotor speeds.
| Identifier | ExFiles\Box 173\2\ img019 | |
| Date | 22th March 1933 | |
| GOSHAWK BLOWER 144X K AND η AGAINST V/L FOR VARIOUS SPEEDS FAIRED CURVES DERIVED FROM DRY AIR TESTS REPORTED IN HS{Lord Ernest Hives - Chair}/ALN 2/M.J. 22.3.33. DIFFUSER E 39391 [S20] GEAR 150:17 η IS FOR BLOWER ONLY ALLOWING FOR CARB. DEPRESSION. FIGURES AT RIGHT REPRESENT DRIVE SHAFT R.P.M. FIGURES AT LEFT REPRESENT ROTOR TIP SPEED IN FT/SEC = U Graph Data: η Curves (top set) and K Curves (bottom set) RPM Labels: 2250, 2500, 2600, 2750, 3000, 3250, 3500 Rotor Tip Speed Labels (U): 736, 818, 850.5, 900, 981.5, 1063.5, 1145 Vertical Axis (η): .70, .60, .50 MAX η .8 = 8" 15" Vertical Axis (K): 1.2, 1.1, 1.0, 0.9, 0.8 Horizontal Axis (V/L): 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 Handwritten Note: Various notes re tip condition | ||