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).
Table of gear ratios and road speeds for the Goshawk II and III models.
| Identifier | ExFiles\Box 75\1\ scan0305 | |
| Date | 13th December 1924 guessed | |
| GOSHAWK II & III GEAR RATIOS. V4247 AXLE RATIO 11/50. EFFECTIVE WHEEL DIAM = 31.4" TABLE GIVING ROAD SPEED ON DIFFERENT GEARS G.III 4.SPEED BOX. | GEAR. | GEAR BOX RATIO. | ENG. R.P.M. | M.P.H. | |---------|-----------------|-------------|--------| | TOP. | 1. | 1000 | 20.55 | | 3.RD. | 1.51 | 1000 | 13.6. | | 2.ND. | 2.33 | 1000 | 8.82 | | 1.ST. | 3.73 | 1000 | 5.51 | | REVERSE.| 3.20. | 1000 | 6.42. | GII. 3 SPEED BOX. | GEAR. | GEAR BOX RATIO. | ENG. R.P.M. | M.P.H. | |---------|-----------------|-------------|--------| | TOP. | 1. | 1000 | 20.55. | | 2.ND. | 1.63. | 1000 | 12.61. | | 1.ST. | 3.17. | 1000 | 6.48. | | REVERSE.| 4.30. | 1000 | 4.78. | ack | ||