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).
Calculations from Test No. 22 for the Goshawk engine.
| Identifier | ExFiles\Box 75\3\ scan0219 | |
| Date | 31th December 1924 | |
| 22 Test No. Z Contd. (Goshawk) (CACULATIONS). Extra on load. | Armature | Ohmic | Back | Power delivered. | % Slip. | Engine Volts. Amperes. | resistance | volts | E.M.F. | Watts. H.P. | | speed. | (Ohms). | light. | | (H). | | 1.63 | 3.68 | .443 | .85 | 61.25 | 2250 | .302 2.66 | 4.62 | .576 | 1.17 | 84.86 | 3920 | .525 3.07 | 6.03 | .508 | 1.00 | 109.48 | 6610 | .886 3.17 | 7.60 | .417 | .86 | 134.38 | 1021 | 1.369 6.13 | 9.36 | .655 | 1.37 | 157.0 | 1469 | 1.97 31.12.24. | ||