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).
The bumping test of special cross steering levers F3727/8 - X.701.
| Identifier | ExFiles\Box 80\1\ scan0125 | |
| Date | 2nd March 1914 | |
| From Exp. Dept. Copies for: J.{Mr Johnson W.M.} R.{Sir Henry Royce} Da.{Bernard Day - Chassis Design} Na.{Mr Nadin} Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}21/L2314. March 2nd. 1914. Report on bumping test of Special Cross Steering Levers. F3727/8 - X.701 This lever is almost like the present standard lever C446 but the proportions have been altered slightly at the point where the channel section changes to a solid rectangular section near the ball stud boss. The pair of levers which I have tested are hand forged and are about 1/32" under drawing size in the rectangular section near the ball stud boss. Also we are not sure that the steel is the same as is used in the present type drop forged levers. For these reasons the results of the tests are not very conclusive, but at the same time point to weakness. Drop fogings are on order but I cannot yet obtain any. The off side lever F3727 broke close up to the ball stud boss after running 45 minutes. The near side lever F3728 broke at the same point after 2 hrs 5 mins. running. I would point out that the present levers C446/7 are slightly over the drawing size as this would be important if new dies were made at some time to the present drawing sizes. The last few standard levers tested on the same frame as the special levers ran as follows. | ||