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 calculations for torque on the propeller shaft when stopping the car at various velocities.
| Identifier | ExFiles\Box 77\1\ scan0095 | |
| Date | 28th June 1911 guessed | |
| X48A 2633 Torque on Propellor Shaft in stopping car. Chassis weight complete Day 35 cwts = 3920 lbs Velocity: 10 mph = 14.6 ft/s, 20 mph = 29.3 ft/s, 30 mph = 43.9 ft/s, 40 mph = 58.6 ft/s | Car brought to rest in | 19 ft | 33.5 ft | 94 ft | 174 ft | |---|---|---|---|---| | Negative Acceleration | 5.65 ft/sps | 12.8 ft/sps | 10.26 ft/sps | 9.85 ft/sps | | Reversed tractive effort | 688 lbs. | 1560 lbs. | 1250 lbs. | 1200 lbs | | Torque on Propellor Shaft | 3940 in. lbs | 8920 in. lbs | 7150 in. lbs | 6860 in. lbs | | Equivalent Engine HP 1000 rpm | 62.5 HP | 141 HP | 113.4 HP | 109 HP | Data ple | ||