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 engine performance notes on crank inertia, piston efficiency, and bearing tests.
| Identifier | ExFiles\Box 173\2\ img060 | |
| Date | 20th February 1934 | |
| -2- BENTLEY. Effective inertia of crank + big ends and pistons 310/3 with inertia on nose 10 + 103 = 113 Stiffness - 50,000 Speed (calculations not too good) 4600 The Aerolite pistons also give 7 M.E.P. more at low speeds; efficiency of 93 instead of 87. 4-B-IV has done 10,000 miles and the cage in the bearing is broken, rest perfect. We are putting in a steel cage for a further 10,000. Can you find a hypoid oil that does not fill everything with carbon ? Hs{Lord Ernest Hives - Chair}/H.{Arthur M. Hanbury - Head Complaints} Grylls. | ||