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).
Letter from The S.U. Carburetter Co. Ltd analysing faults found in returned pumps.
| Identifier | ExFiles\Box 149\4\ scan0035 | |
| Date | 12th October 1936 | |
| Copy of Letter From: THE S.U.CARBURETTER CO.LTD Birmingham 8. October 12th.1936 Messrs. Rolls-Royce Ltd. DERBY. Dear Sirs, We thank you for your letter of the 10th inst. and note your remarks. We have been keeping a very careful analysis of all the pumps you have returned for some time, and this shows that 1. 73 were returned for leaky diaphragm 2. 125 " " " shrunken " 3. 116 " " " being noisy 4. 38 " " " other causes 5. 46 " " " breakages or had been 6. 10 Nothing could be found (tampered with wrong with them. 408 As regards 1 and 2, leaky and shrunken diaphragm, this is due to one and the same cause namely shrinkage of the diaphragm causes the diaphragm to become loose on the spindle. No. 3. Noise. This is partly due to the type of diaphragm used, and we warned you at the time you decided to adopt this type that the instruments would be more noisy. Moreover, you supplied us with two pumps as a standard for noise, and the majority of those you have returned with this complaint have been well up to this standard. We went into this matter with Mr. Dixon when we visited these works a week or two back, and we think you will find he agrees this is correct. Of the other faults, very few of these would cause a breakdown, the majority being slight leaks in the unions &c. As regards the breakages (5), those played about with included pumps on which the blades had been bent, those which had been taken down and re-assembled incorrectly, also instruments which had broken parts in them. (Continued) Handwritten notes: r 1263 (top right) 198 (next to list items 1 & 2) valve? (next to 'noisy') unions? (next to 'unions &c.') stopped 70th Supply GWH{George W. Hancock - Head Chateauroux} (bottom right) | ||