The failure of a 2nd Motion Shaft in a 9.B.V. Gear Box during testing.
| Identifier | ExFiles\Box 109\4\ scan0124 | |
| Date | 5th July 1939 | |
| 666 + Hood. To Rm. {William Robotham - Chief Engineer} from HPS {Horace Percy Smith - Experimental Factory Mgr} /RH. {R. Hollingworth} c. By. {R.W. Bailey - Chief Engineer} c. Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} c. Da. {Bernard Day - Chassis Design} c. HPS. {Horace Percy Smith - Experimental Factory Mgr} HPS {Horace Percy Smith - Experimental Factory Mgr} /RH. {R. Hollingworth} 4/BA.5.7.39. 9.B.V.Gear Box in 30.G.VII Chassis. Failure of 2nd Motion Shaft. GB.4817. This box has run 202 miles on road test, and 129 hours 5 minutes on Dynamometer, which consisted of 1 hour 2,000 r.p.m. 1st gear, full throttle with 720 lbs lift, 9 hours 2,000 r.p.m. 2nd gear, 530 lbs/lift, and 15 hours 50 mins. 2,000 r.p.m. full throttle 2nd gear, 540 lbs lift when 2nd speed driver gear shed 2 teeth. The box then ran 100 hours on overdrive at 2,000 r.p.m full throttle 310 lbs lift and 3 hours 15 mins on 1st gear 2,000 r.p.m. with 2nd gear load of 540 lbs, the constant mesh gear on 2nd Motion Shaft then shed 3 teeth as shewn on the attached photograph. HPS {Horace Percy Smith - Experimental Factory Mgr} /RH. {R. Hollingworth} | ||
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).