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).
Statistical report on exhaust system complaints, broken down by model, issue, and time period, with remarks on fixes.
| Identifier | ExFiles\Box 130\1\ scan0127 | |
| Date | 31th March 1934 guessed | |
| - 6 - TOTAL EXHAUST COMPLAINTS. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. March Quarter. C.C. - 8 4 35 47) W.P. - 7 - 24 31) 78 Previous Quarter. C.C. - 18 1 21 40) W.P. - 3 1 16 20) 60 Six Months. - 36 6 96 138 138 EXHAUST MANIFOLD CRACKED OR BROKEN. March Quarter. C.C. - 5 2 - 7) W.P. - 3 - 2 5) 12 20 HP. and early 20/25. - Exhaust Manifolds with cooling fins are now available. No failures of this type yet reported. Depot Sheet Hd.{Mr Hayward/Mr Huddy}229 Previous Quarter. C.C. - 2 1 - 3) W.P. - 1 1 - 3) 6 Ph.I. - Expansion allowance now increased and malleable castings available. Six Months. - 11 3 4 18 18 Ph.II. - Flange bosses now thickened up to prevent cracking. EXHAUST SILENCER CORRODED. March Quarter. C.C. - - 1 1 2) W.P. - - - - -) 3 All silencers are now being Parkerised and a longer life is expected. Previous Quarter. C.C. - - - 3 3) W.P. - - - - -) 3 Six Months. - - 1 5 6 6 EXHAUST BLOWS GENERALLY AND CUT-OUT SEIZED OR RATTLE. March Quarter. C.C. - 3 1 17 21) W.P. - 4 - 15 19) 40 This trouble on Ph.II is caused by the sliding joint not working properly and is cured by modifying the sliding joint and fitting an additional stay to the rear silencer as per Depot sheet Hd.{Mr Hayward/Mr Huddy}199 and Hd.{Mr Hayward/Mr Huddy}218. Previous Quarter. C.C. - 16 1 10 27) W.P. - 2 - 10 12) 39 Six Months. - 25 2 52 79 79 | ||