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).
Test results for a torque of 66 lb inches under various conditions.
| Identifier | ExFiles\Box 35\4\ scan 107 | |
| Date | 16th March 1914 guessed | |
| Torque of 66 lb inches Gohawk S.O. 4929. Sh. V (II). (Bdg) A.972. M.D. Column 1: No. 1, 50% adva Amperes: 141 Volts: 9.18 Speed: 630 B.H.P.: .66 E.H.P.: 1.73 Eff: .381 Column 2: No. 2, 75% adv. Amperes: 141 Volts: 9.18 Speed: 720 B.H.P.: .755 E.H.P.: 1.73 Eff: .436 Column 3: No. 2, Full adv. Amperes: 150 Volts: 9.00 Speed: 705 B.H.P.: .74 E.H.P.: 1.81 Eff: .408 Column 4: No 4 Amperes: 150 Volts: 9.00 Speed: 720 B.H.P.: .755 E.H.P.: 1.81 Eff: .417 | ||