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).
Bentley oil temperature tests to determine the value of the front timing case as an oil cooler.
| Identifier | ExFiles\Box 131\1\ scan0092 | |
| Date | 10th April 1933 | |
| X4693 To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} O.{Mr Oldham} Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} O.{Mr Oldham} R.{Sir Henry Royce} Da.{Bernard Day - Chassis Design} O.{Mr Oldham} By.{R.W. Bailey - Chief Engineer} Hdy.{William Hardy} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/ET.10.4.33. BENTLEY OIL TEMPERATURE. In order to determine - (a) The value of the front timing case as an oil cooler. (b) The maximum oil temperature likely to be attained by the Bentley car We asked GWH.{George W. Hancock - Head Chateauroux} to carry out some tests for us, running with the radiator shutters fixed in the fully open position, and again under the same conditions but with the timing case insulated from the air by shredded asbestos. The following results were obtained:- Front timing case lagged :- Rad. shutters held open MPH. AIR. OIL. WATER. 60 14oC 72oC 50oC 70 14oC 79oC 52oC 80 14.5oC 85oC 56oC It will be observed that the timing case is responsible for a drop of 4oC at 85o, and also that with an air temperature of 30oC, the oil temp. is likely to reach 96oC, at a speed of 80 m.p.h. Lagging removed :- 60 15oC 72oC 50oC 70 15oC 75oC 52oC 80 15oC 81oC 56oC This is no worse that the conditions experienced on the last Phantom which ran 10,000 miles in France. Run of 12 miles each test. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||