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 report on a B.III bump chassis front end after a 50-hour run on 3 inch Cams.
| Identifier | ExFiles\Box 119\1\ scan0125 | |
| Date | 23th August 1938 | |
| To By.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to By/HEB.{H. Biraben} c. to By/WS. c. to HPS{Horace Percy Smith - Experimental Factory Mgr}/WB.{Mr Brazier/Mr Bell} c. to By/ALD.{F. Allwood - Experimental Design} Handwritten: 2 104 also 400 Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale}1/JH.23.8.38. B.III BUMP. CHASSIS - FRONT END. 50 hour run on 3" Cams. Full Specification. See HPS{Horace Percy Smith - Experimental Factory Mgr}/NHB.1/VS.{J. Vickers}15.8.38. and HPS{Horace Percy Smith - Experimental Factory Mgr}/NHB.2/VS.{J. Vickers}15.8.38. Suspension mechanism. This was generally satisfactory. Upper Yoke Bearings. These were silentbloc with rolled ends. Both ran 50 hours but are in poor condition now. They had to deal with double the normal damping load. Should be added to L.O.P. Lower Lever Bearings (E.2130) Standard silentbloc. Ran 50 hours and are in good condition. Should be added to L.O.P. Rubber Spheres. One ran 86 hours, and failed, the other has completed 100 hours. Coil Springs. One has run 109 hours, the other 92 hours. Both are intact. They were shot blasted and cadmium plated not cyanided. 8" deflection springs should appear on L.O.P. of Bentley III, Bentley 50 and Wraith 60. We do not think that cyaniding is now necessary. | ||