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).
Testing plain whitemetalised bearings for the Eagle XVI engine.
| Identifier | ExFiles\Box 42\1\ Scan125 | |
| Date | 1st December 1935 | |
| EXPERIMENTAL REPORT. Expl. No. REF: NHCS/BE1.12.35. To Hs.{Lord Ernest Hives - Chair} from RHC.{R. H. Coverley - Production Engineer} RE. EAGLE XVI. We have carried out a further series of tests with plain whitemetalised bearings having steel cores. These bearings were both pressure fed. Castrol oil was used which made it possible to run at higher temperatures. The bearings tested were in one case Press fit having clearance on shaft of .001, and the other floating fit with a clearance on shaft of .0008 and .0012 between trunnion and bearing. The press fit bearing failed after 25 hrs. 32 mins. running. The floating bush is still in good condition, and will be subjected to further tests. It will be observed that on these tests we have run with the max. load of 1935 lbs. 1st. Test. Loads - lbs. Time run Total, Temp. Oil press: R.P.M. Press fit brg. Floating fit brg. hrs.mins. hrs.mins. Press fit. Floating fit. 1200 533 535 1 27 1 27 72°C 66°C 15 lbs. 1940 533 535 1 25 2 52 85°C 85°C 15 " 3700 533 535 2 11 5 3 115°C 115°C 15 " Bearings were examined at this point and the clearances :- Floating bush. Between bearing and trunnion .0012. .0008 Press fit bush. " " trunnion .0001 2nd. Test. 1200 1018 1018 1 1 86°C 79°C 15 lbs. 1940 1018 1018 1 15 2 15 103°C 83°C 15 " 3700 1018 1018 3 54 6 9 140°C 99°C 15 " 1200 1502 1502 1 15 7 24 91°C 60°C 15 " 1940 1502 1502 1 15 8 39 114°C 79°C 15 " 3700 1502 1502 7 30 16 9 152°C 125°C 20 " CONTD :- | ||