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 failure of Silentbloc and Inlox bearings for the axle yoke on a Bentley III bumper chassis.
| Identifier | ExFiles\Box 119\1\ scan0064 | |
| Date | 4th January 1938 | |
| To Rm.{William Robotham - Chief Engineer} from HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. to BY.{R.W. Bailey - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} c. to Da.{Bernard Day - Chassis Design} c. to HPS.{Horace Percy Smith - Experimental Factory Mgr} Handwritten: LPE When are the silent block people coming down HPS{Horace Percy Smith - Experimental Factory Mgr} 1024 HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}4/V.4.1.38. BENTLEY III BUMPER CHASSIS. FB.3143-4. Silentbloc Bearings for Axle Yoke. To date five upper bearings FB.3143 and five lower bearings FB.3144 have failed on the above chassis. The nature of failure is similar in each case, i.e. the inner member comes adrift from the rubber and moves endwise. The rubber is sheared, particularly in the case of the lower bearing. Upper Bearing FB.3143. - 4 'Silentbloc' and one 'Inlox'. The Inlox bearing, after 13 hours 20 mins. running, is in slightly better condition than the Silentbloc after the same test. Two bearings have run 11 hours and one 5 hours. Lower Bearing FB.3144. The inner member of this bearing has a step formed on the outside. End movement of this piece has resulted in shearing the rubber. Two bearings have run 17 1/2 hours, two 11 hours and one 15 hours. HPS{Horace Percy Smith - Experimental Factory Mgr}/R.{Sir Henry Royce} Hollingworth. | ||