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).
Instructions for exhaust system comparisons on an OHC Bentley and endurance testing for a B.4 unit.
| Identifier | ExFiles\Box 155\2\ scan0209 | |
| Date | 28th March 1938 | |
| -3- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}28.3.38. OHC. BENTLEY. Continue with exhaust system comparisons as discussed. Include also an analysis of present Bentley system. Unit to be removed as soon as bearing unit is ready. B.4 UNIT. Unit for bearing endurance is equipped with Nos.1, 3, 5, and 7 die cast AC.9. Nos. 2, 4 and 6 centri-cast main bearings. 3 Big ends centri cast AC.9 and 3 die cast. Tin plated pistons are to be fitted if available. Endurance to consist of 20 hrs. at oil inlet temp. of 120°C. Each hour 30 mins. 4000, 25 mins. 4250, 5 mins. 4500. 7 hrs. full load, 2 hrs. ½ load, and 1 hour ¼ load. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||