Formula for calculating the minimum oil pressure required for oil to enter holes in journal bearings.
| Identifier | ExFiles\Box 159\6\ scan0002 | |
| Date | 19th January 1937 | |
| MINIMUM OIL PRESSURE REQUIRED FOR OIL TO ENTER HOLES IN JOURNAL BEARINGS. This is (DW)^2 / 12g ; or, using customary dimensions P = 6.8 (DN)^2 / 100,000,000 where D is the journal dia. in ins. M " " R.P.M. P " " pressure in lbs square inch. For the Bentley at 4500 r.p.m. P. is 7 lbs square inch. Kestrel(Aero Engine) " 3600 " P. " 10.7 lbs square inch. | ||
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).