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).
Test schedule for engine components including piston comparisons, bore wear, and exhaust system analysis.
| Identifier | ExFiles\Box 155\2\ scan0190 | |
| Date | 3rd January 1938 | |
| -4- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/WH.3.1.38. B.4 UNIT. CONT'D.{John DeLooze - Company Secretary} (2) Continue consumption and piston comparison. WRAITH III NO.1. (rig engine). Continue bore wear tests. WRAITH II NO.1. (rig engine). In view of piston scuffing trouble on several Wraith III units running in on Mobiloil Arctic try. (1) 3 con rods with oil jet holes, 3 without, compare conditions of pistons after running on - (a) Motorine C. (b) Mobiloil Arctic. (2) Try under cold starting conditions. (3) " " normal running in " (4) Trial of tin plated pistons, No.2 BED. B.2X. OHC. EXHAUST SYSTEM TESTS. Exploit what improvement can be made on existing 3 port, single downtake and silencer by - (1) (a) Similar to standard Bentley and analyse. (b) Manifold with a downtake from each end of manifold into a single standard Bentley silencer. (c) As (b) with dual Bentley silencers. (2) Carry out similar tests but with 4 port exhaust. | ||