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).
Page of engine data, including bore, stroke, weights, and bearing dimensions.
| Identifier | ExFiles\Box 115\2\ scan0499 | |
| Date | 26th October 1939 | |
| -3- Rm{William Robotham - Chief Engineer}/TAS.{T. Allan Swinden}9/JH.26.10.39. Engine Data Cont'd.{John DeLooze - Company Secretary} Bore 2.735" Stroke 3.75" Connecting rod length 7.25" r.p.m. 4500 Assumed weight of piston,rings gudgeon pin and little end 1.10 lbs. Assumed weight of big end 0.90 lbs. Projected area of big end bearing 1.638 sq.in. Main bearing dimensions - Diameter 2.00" Length of front bearing 1.50 Centre " 1.20 rear " 1.60 (N.B. All calculations for outer bearing are based on the front bearing). Firing order 1342. Assumed max. gas pressure 500 lb.insq. P.V. Factor - rubbing speed X pressure intensity. | ||