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).
10,000 miles test report on Engine Unit I6 and torque reaction dampers.
| Identifier | ExFiles\Box 101\1\ scan0273 | |
| Date | 15th April 1936 | |
| Hs{Lord Ernest Hives - Chair}-7/H# x500a KGS Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}/I/JAB. 15.4.36 To. Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} GRY.{Shadwell Grylls} all testers W/M F.D. o to. Woz. o to. H.{Arthur M. Hanbury - Head Complaints} Less el o to. By.{R.W. Bailey - Chief Engineer} o to. Da.{Bernard Day - Chassis Design} HPW o to. Ep.{G. Eric Platford - Chief Quality Engineer} o to. Mr. o to. Cx.{Major Len W. Cox - Advertising Manager} S&S o to. RHC.{R. H. Coverley - Production Engineer} o to. Hs.{Lord Ernest Hives - Chair} SPECIFICATION OF 22.G.V. To RHC{R. H. Coverley - Production Engineer}/CP. from 13.1.36 to 27.3.36 10,000 MILES TEST REPORT IN ENGLAND ENGINE UNIT I6 The general performance of the engine was good, during the mileage. Acceleration and power was maintained. Slow running was even with the ignition lever retarded six to eight notches. If left full advanced, running was uneven and thumpy. Starting difficulties starting up hot was experienced, 45 secs. to 60 secs. before the engine fired with volumes of black smoke from the exhaust. This was eventually traced to insufficient breathing of the float chamber. A stand pipe breather of ample dimension cured this trouble. Considerable amount of water was lost during the maximum speed runs. This was due to boiling in the cylinder head. Two modifications were made either of which cured the loss of water. Ist, Spring removed from Radiator thermostats which reduced the temperature at which the shutters were opened in conjunction with an increased load on the filler cap escape valve. Secondly, The front water passages for the cylinder head were stopped up, increasing the flow of water to the rear of the cylinder head. This stopped local boiling and a more even temperature was maintained between the cylinder head and radiator inlet. The spring refitted to radiator thermostat gave a more uniform working of the shutters with less variation in the temperature. There was throughout the mileage a hesitation when opening the throttle from low speeds and medium speeds, the latter definately worse with low water temperature, i.e. 60°c. At 70° to 80°c it was not so noticeable but still a feature that will have to be corrected. Detonations were noticeable up to 30 MPH. From 10 to 20 MPH. a torque period could be felt and towards the finish of the mileage, the half crankshaft period became noticeable. O.K. WYMAN TORQUE REACTION DAMPERS LOP. E 60.774 Complete to above LOP. - Standard Production. There was insufficient clearance in the centre plate for the bolt holding the friction washers. The rock of the engine caused the bolt to foul which caused a knock felt throughout the body, more clearance will have to be allowed for the more flexible mounting of the engine. A load of 2.1/2 lbs was found sufficient to steady the engine while idling. | ||