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 detailing exhaust system complaints and their remedies for various models over a six-month period.
| Identifier | ExFiles\Box 130\1\ scan0058 | |
| Date | 30th June 1933 guessed | |
| - 6 - TOTAL EXHAUST COMPLAINTS. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. June Quarter. C.C. 3 19 2 47 71) V.P. - 8 - 21 29) 100 Previous Quarter. C.C. - 13 5 31 49) V.P. 1 12 - 34 47) 96 Six Months. 4 52 7 133 196 196 EXHAUST MANIFOLD CRACKED OR BROKEN. 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. June Quarter. C.C. 2 9 1 3 15) V.P. - 8 - - 8) 23 PH.I. - Expansion allowance now increased and malleable castings available. Also sliding joint type of exhaust manifold being triedout for extreme cases. Previous Quarter. C.C. - 7 1 1 9) V.P. 1 7 - 1 9) 18 PH.II. - Flange bosses now thickened up to prevent cracking. Six Months. 3 31 2 5 41 41 EXHAUST SILENCER CORRODED. June Quarter. C.C. - - 1 3 4) V.P. - - - - -) 4 All silencers are now being Parkerised and a longer life is expected. Previous Quarter. C.C. - - 2 - 2) V.P. - - - 2 2) 4 Six Months. - - 3 5 8 8 EXHAUST BLOWS GENERALLY AND CUT-OUT SEIZED OR RATTLE. June Quarter. C.C. - 10 - 41 51) V.P. 1 - - 21 22) 73 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 Sheets Hd.{Mr Hayward/Mr Huddy}199 and Hd.{Mr Hayward/Mr Huddy}218 Previous Quarter. C.C. - 6 2 30 38) V.P. - 5 - 31 36) 74 Six Months. 1 21 2 123 147 147 | ||