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 detailing test results for various units, including running times, mileage, and backlash measurements.
Identifier | ExFiles\Box 107\2\ scan0164 | |
Date | 29th June 1926 | |
UNIT NO. | RUNNING TIME HOURS ON TEST BED MILES ON CHASSIS. | WITH OR WITHOUT BALANCING CAM. | MOULDED OR SHEET FABROIL. | HELIX ANGLE. | APPROX. ORIGINAL BACKLASH. | APPROX. FINAL BACKLASH. 1 | 150 hrs. at 1000 r.p.m. 7,000 miles in France (20.6.VI) | With | Sheet | 32° | 0.0 | 0.009 2 | 190 hrs. with 68 hrs. between 4000-4500 r.p.m. 1,700 miles (24.6.VI) | 30 hrs. without | Sheet | 32° | 0.0 | 0.007-0.015 3 | 11,000 miles (24.6.VI) | With | Sheet | 32° | 0.0 | 0.004 4 | 6,320 miles (27.6.VI) | With | Sheet | 32° | 0.0 | 0.003 5 | 7,040 miles including prolonged high speeds to break distributors (28.6.VI) | With | Sheet | 41° | 0.0 | 0.008 6 | 192 hrs. general development not above 4000 r.p.m. 2,000 miles (27.6.VI) | 40hrs. without. | Sheet | 41° | 0.0 | 0.003 7 | 21,000 miles (26.6.VI) | Without | Moulded | 41° | 0.0 | 0.012-0.01 8 | Negligible running (25.6.VI) | Without | Moulded | 41° | 0.002 | Now in sg{Arthur F. Sidgreaves - MD} car. 9 | 3,300 miles (29.6.VI) | Without | Moulded | 41° | 0.0 | 0.002 | ||