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).
Summary report of component complaints for various vehicle models over a six-month period ending in December.
| Identifier | ExFiles\Box 47\3\ Scan335 | |
| Date | 1st December 1931 guessed | |
| -7- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. DYNAMO LOW OUTPUT. December Quarter. C.C. - 3 - 3 } 6 6 The dynamos giving higher output are available in cases of complaints. W.P. - - - - } Previous " C.C. 1 1 - 2 } 4 4 W.P. - - - - } Six months. 1 4 - 5 10 10 TOTAL EXHAUST COMPLAINTS. December Quarter. C.C. 31 54 11 42 138 } 180 180 W.P. 11 7 3 21 42 } Previous " C.C. 32 49 17 43 141 } 187 187 W.P. 19 10 2 15 46 } Six months. 93 120 33 121 367 367 EXHAUST MANIFOLD CRACKED OR BROKEN. December Quarter. C.C. 12 15 7 - 34 } 51 51 Late 20 HP. & Early 20/25 HP - Exhaust Manifolds with cooling fins are now being produced for these cars and will shortly be available. Depot Sheets Nos. Hd.{Mr Hayward/Mr Huddy}187 and Hd.{Mr Hayward/Mr Huddy}229. W.P. 9 5 3 - 17 } Awaiting results of this type after further running. Previous " C.C. 9 12 3 2 26 } 42 42 Ph.I - Expansion allowances now increased & malleable castings available. Also sliding joint type manifold being tried out for extreme cases. Depot Sheet Hd.{Mr Hayward/Mr Huddy}145 W.P. 10 4 2 - 16 } Six months. 40 36 15 2 93 93 EXHAUST SILENCER CORRODED. December Quarter. C.C. 1 - 3 - 4 } 4 4 Silencers generally have a short life Experimental Dept. now investigating this matter and cosletizing is being adopted to reduce corrosion. W.P. - - - - - } Previous " C.C. 2 - 9 - 11 } 11 11 W.P. - - - - - } Six months. 3 - 12 - 15 15 | ||