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 for a rear axle on a bumper test, detailing component failures and replacements.
| Identifier | ExFiles\Box 80\2\ scan0295 | |
| Date | 28th June 1920 | |
| X.3981 (filed 28/6/20) Test 1. X.1331. REAR AXLE ON BUMPER TEST. X.3981. Total hours run on chassis. Remarks. Hours run. 31.5.20. O.S. Spring F.7790. 2200 lbs. N.S. " F.7789. 2100 " Spring Main Bearing Bracket. O.S. bolt broken F.419. 1 hr. 45 mins. 1.6.20. O.K. 7 " 10 " 2.6.20. Bolt on diagonal stay F.7407 broken. 71 " 15 " 2.6.20. & Spring taken off. 14 " 35 " Test 2. £ 3.6.20. New springs fitted N.S. F.7787 - 1900 lbs. O.S. F.7788. - 2000 lbs. 17 " 30 " 4.6.20. Spring to clip O.S. broken. 6 " 55 " £ 5.6.20. O.K. 15 " 50 " 7.6.20. F.419 bolt broken (spring main bearing bracket) 17 " 5 " 8.6.20. Spring N.S.1, 2, 3 and 4 leaves broken under rear clip. 21 " 15 " Test 3. 10.6.20. New parallel springs fitted 363Z 2120 lbs. 363Y 1990 " Contd. R.R. 199 (250 T) (SD676) 19-7-17/MP180895 | ||