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).
Specification sheet detailing the data for the Humber Super Snipe.
| Identifier | ExFiles\Box 108\2\ scan0207 | |
| Date | 16th January 1939 | |
| To Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}1/JH.16.1.39. Herewith data of the Humber Super Snipe R.A.C. rating 27 H.P. Engine. Rating 26.88. Cyls. 6 Bore ins. 3.25. Bore m/m.{Mr Moon / Mr Moore} 83. Stroke ins. 4.72". Stroke m/m 120. Capacity cu/ins. 249.23. Capacity m/m 4,085.7. Firing order 1,5,3,6,2,4. Compression ratio 6.13 : 1. Oil pressure. 45/50 lbs.sq.in. Gearbox. Ratios top 4.09. third 5.99. second 10.1. first 15.13. Reverse 15.13. Dimensions. Wheelbase. - 9' - 6". Track front 4' - 7 3/4". Track rear 4' - 8". Overall length 14'- 7". Overall height 5'- 5". Overall width 5'- 10". Ground clearance - 7 3/4". Turning circle. 40' 6". Capacities. Petrol - 15 galls. Oil engine - 14 pts. Gearbox - 4 pts. Rear axle - 4 pts. Rear axle - 4 pts. Water - 3 galls. 6 pts. Battery - 12 v.{VIENNA} 63 amps. | ||