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).
Strip report on the condition of a B.4 Unit dismantled following the failure of a balance weight stud.
| Identifier | ExFiles\Box 82\1\ scan0234 | |
| Date | 29th September 1933 | |
| B3a To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from RHC.{R. H. Coverley - Production Engineer} RHC.{R. H. Coverley - Production Engineer}4/BE29.9.33. B.4. Unit ex 1-B-IV. Below is a strip report on the condition of B.4 Unit, dismantled following the failure of a balance weight stud after 7,395 miles running in France. Crankcase & Bearings Top and bottom halves badly damaged due to balance weight coming adrift. Main Bearings W/Mt. No.1. Case half - gritty, otherwise good. Cap half - " No.2. Case half - Cracked & signs of breaking up in locally. Cap half - Cracked & signs of breaking up above dowel hole. No.3. Case half - Several small cracks and rather rough. Cap half - Rough & several small cracks near dowel hole. No.4. Case half - Pitted and gritty. Cap half - Pitted and gritty. No.5. Case half - Small portion of metal broken away at dowel hole. Cap half - Surface pitted and several small cracks round dowel hole. No.6. Case half - slight scores and surface gritty. Cap half - Several smallcracks on edge of bearing, at dowel hole section. No.7. Case half - Gritty. Cap half - 2 cracks on thrust face. Crankshaft. EB.39. Test No. A.19. V.C.M. Slight signs of wear on all journals. Stud securing No.1. balance weight broken off and balance weight badly damaged. cont'd.{John DeLooze - Company Secretary} | ||