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).
Performance and failure analysis graph for a Gates Vulco vee belt test, plotting revolutions per minute against hours.
| Identifier | ExFiles\Box 135\1\ scan0236 | |
| Date | 1st November 1938 | |
| VEE BELT TEST - GATES VULCO PULLEY ANGLE - 34° 12' BELT PERIPHERY - INTERNAL - 38 15/16" EXTERNAL - 42 13/16" LIFE - 11 HOURS. 45 MINS. Graph Annotations: REVS PER MIN 4600 4400 4200 4000 3800 1st Adjustment on centres Test stopped Overnight stand Dropped Voltage 260 Fuse blown Motor Brushes adjusted Flat Belt retensioned Stop for night (1st FAN) 10 HRS. 27 MINS & TEST Assembly running time unknown Flat Belt broken Fan broken New Fan Blister developed on outer periphery caused by fractured cords. IP 25 HP 20 15 HOURS 6 12 18 24 30 Mins Legend: * FAN BROKEN Bottom Right: DIAGRAM No. 883 T. 1.11.38. | ||