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).
Brake performance tests conducted during morning and afternoon runs.
| Identifier | ExFiles\Box 12\5\ 05-page267 | |
| Date | 13th March 1931 | |
| 20/HS{Lord Ernest Hives - Chair} X7450. BRAKE TESTS. 13.3.31. 22-EX. Morning Run. Cold in Shop. Foot Pedal 4¾". Front Toggles 1⅜". 12 Brakes from 70 - 10. Foot Pedal 5⅛". Front Toggles 1½". 10 miles braking 40 - 10 every ½ mile. 12 brakes from 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 10 miles braking 40 - 10 every ½ mile. 12 brakes from 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 10 miles braking 40 - 10 every ½ mile. 12 brakes from 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 10 miles braking 40 - 10.every ½ mile. 12 brakes 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 116 miles covered. With brakes cool. From 30 M.P.H. pull up in 25' " 60 " " " " " 156' " 50 " " " " " 96' " 40 " " " " " 62' " 30 " " " " " 30' " 70 " " " " " 198' Afternoon Run After standing 1 hour. Foot Pedal 4¾". F.{Mr Friese} Toggles 1⅜". Took brakes up one notch - Foot Pedal 5⅛". Front Toggles 1". 12 brakes 70 - 10. Foot Pedal 5". Front Toggles 1½". 10 miles braking 40 - 10 every ½ mile. 12 brakes 70 - 10. Foot Pedal 5". Front Toggles 1½". 10 miles braking every ½ mile. 12 brakes 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 10 miles brakes 70---10 every ½ mile. 12 brakes 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 10 miles braking every ½ mile. 12 brakes 70 - 10. Foot Pedal 4¾". Front Toggles 1½". 95 miles covered on run. Measurements cold in Shop 14.3.31. Foot Pedal 4¾". Front Toggles 1½". | ||