Test report detailing the results of bumper spring tests on a front chassis.
| Identifier | ExFiles\Box 80\2\ scan0229 | |
| Date | 1st October 1920 | |
| AS X2628 BUMPER TEST - FRONT. CHASSIS. Springs fitted. F.4630 - 11 leaves, tie clips, nibs and slots, tapered ends. Fitted to chassis 21.9.20. (O.S.) Removed 24.9.20. Spring replaced with American top leaf fitted. Fitted 24.9.20 Taken off 30.9.20 New spring leaves fitted with above American top leaf. Fitted 30.9.20 Taken off 1.10.20. New American top leaf fitted to above spring. Fitted 1.10.20 (O.S.) Load in lbs. 950 . Remarks. Top leaf broken 1" rear of clip. Ran 11 hrs. 40 mins. * 2nd. and 5th. leaves broken. Ran 29 hrs. American top leaf broken 1/2" behind rear clip. Ran 24 hrs. Brinell. 1 - 418 USA - 401 2 - 444 3 - 4 - 5 - 477 6 - 7 - 8 - 9 - 10 - 11 - R.R. 255a (100 T) (S.H. 159. 11-8-20) G 2800 | ||
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).