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).
Test log sheet detailing failures and repairs during a front bumper test.
| Identifier | ExFiles\Box 119\2\ scan0098 | |
| Date | 30th April 1920 | |
| X1331 BUMPER TEST - Front. 30.4.20. Total hours run on chassis. Remarks. Hours run. 30.4.20. R-R Radiator 1" higher. E.17143. Leaking through tube splitting on bottom row. 4 hrs. 35 mins. New tube fitted on radiator. - chassis O.K. 27 " 25 " 4.5.20. Bolt broken diagonal stay to Frame. O.S: F.3731. 11 hrs. 5.5.20 N.S. spring leaves 5 and 6 down broken at centre. New leaves fitted. 16 hrs. 25 mins. 7.5.20 Engine suspension bolt and steering box bolts worked loose. 8 hrs. 20 mins. " " " " " 15 " 30 " 7.5.20 New pendulum lever fitted. Side steering fitted with one spring and solid block. O.K. 18 hrs. 10 mins. 6.5.20 Spring clip broken N.S. K.50400 20 " 50 mins. 8.5.20 Spring clip broken O.S. K.50400 24 " 25 " 8.5.20 Two bolts broken F.3509 N.S. front cross member to frame. 29 " 25 " 9.5.20 American tyres fitted 34 x 4 1/2 ( Firestone ) 8 " 32 hrs. Test finished. 11.5.20 | ||