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).
Whitemetal bearing tests, examining load carrying capacity with speed and the effect of shell thickness.
| Identifier | WestWitteringFiles\P\October1926-November1926\ Scan050 | |
| Date | 2nd October 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} ORIGINAL Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/LG1 2.10.26. WHITEMETAL BEARING TESTS. X4633 X1643 (1) Variation in load carrying capacity with speed. We have carried out a number of tests to determine the way in which the load carrying capacity of whitemetal bearings varies with speed. Attached are the results so far obtained. We have no very rational explanation as to why the bearings carry as much load at 3600 r.p.m. as at 1900 r.p.m. before failing. It seems however, as if within the limits of our test the load on the bearing is the critical factor and not the speed. Also that at high speeds the oil film is maintained as well, if not better, than at low speeds. We are now conducting a series of experiments with thermo couples to determine the connection between the temperature of the bearing and the load under which it fails. (2) Thicker shell bearing. At RG{Mr Rowledge}'s suggestion we carried out a test on the large diameter bearing having a shell twice the normal thickness. We found that the failing load of this bearing was slightly greater than those with the thin shell i.e. 1900 r.p.m. thin shell larger dia. bearing failing load 450 lbs/sq.in. Thick shell larger diameter bearing 1900 r.p.m. - failing load 600 lbs/sq.in. contd :- | ||