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).
Gearbox and rear axle temperature readings during overdrive tests, resulting in a seized piston.
| Identifier | ExFiles\Box 97\4\ scan0119 | |
| Date | 31th October 1938 | |
| ( 2 ) GRY{Shadwell Grylls} We have taken gearbox and rear axle temperatures at five mile intervals at maximum sustained speed on overdrive. The figures were as follows:- Distance. Engine Oil. Gearbox. Rear Axle. Air. 5 65°c 61°c 72°c 13°c 10 85 74 87 13 15 94 80 96 13 20 101 85 104 13 25 103 88 104 13 30 104 90 105 13 35 102 91 105 13 The piston then seized. We think the axle might have got a little hotter had the run been continued. A similar run was carried out previously on a very wet day, and the following figures obtained :- Distance. Engine Oil. Gearbox. Rear Axle. Air. 5 42°c 25°c 27°c 9°c 10 66 40 53 9 15 81 50 74 9 20 83 56 80 9 25 84 60 88 9 30 91 60 91 9 35 92 63 93 9 40 90 63 94 9 45 91 65 97 9 50 90 65 98 9 55 94 65 100 9 60 95 68 101 9 We have noted your remarks regarding the propellor shaft and request for note to Pope giving particulars of parcels returned. This has been done in the past for all packages sent by any form of carrier. We will extend the practice to cover goods returned per parcel post. Replying to Hm{Capt. W. Hallam - Head Repairs}/AFM.{Anthony F. Martindale}17/MH.{M. Huckerby}31.10.38, the triangular front engine mount brackets appear to be in good condition. ---------------------- Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} | ||