Letter discussing radiator complaints due to over-lubrication and requesting further steering tests with different tyre pressures and types.
| Identifier | ExFiles\Box 11\2\ 02-page231 | |
| Date | 1st May 1929 | |
| 4794) Expl: Dept: Messrs. Rolls-Royce Ltd., Derby, Angleterre. 79 Hs {Lord Ernest Hives - Chair} /RmL/LG2. 5. 29. Hotel de france, Chateauroux(French test region), Indre France. 47250 Mr. Hancock from Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} We are having quite a number of complaints of radiators becoming choked up through a slimy deposit collecting in the top two or three rows of tubes in the radiator. We think this is due to over-lubricating of the water pump gland. We should like you to try running 22-EX with no lubrication in the water pump gland. This pump is provided with a nitro alloy steel shaft and should not therefore tend to pick up providing the gland will remain water-tight. With reference to steering. We are interested in your remarks re. the difference between worn and new tyres; we should like you to go further with tyre pressures and give us a table of the steering behaviour from 25 lbs/sq.in. on the front tyres to 45 lbs/sq.in. We should also like you to try triple stud tyres, if you can get them from Paris, and Michelin tyres of a corresponding size. We think it would be worth running a pair of each of these tyres for steering tests. We note the loading you have obtained on the cross steering tube. contd :- | ||
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).