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).
Programme of test bed work for Wraith III and B.III engine components, including damper comparisons and cylinder head tests.
| Identifier | ExFiles\Box 155\2\ scan0251 | |
| Date | 25th October 1938 | |
| 1315- To Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/GTS Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}7/JH.25.10.38. Programme of Test Bed Work. Further to Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/MH.{M. Huckerby}10.9.38. No.30. Bed. Wraith III No.1 (a) bed. Unit for comparison of dampers. (a) Take torsional diagrams of crankshaft with alum harmonic damper up to 4500. Above to be set with friction poundage as found most satisfactory with previous steel harmonic damper. Check for gear rattles or any other peculiarities throughout speed range. (b) repeat with original steel harmonic damper. (c) With standard spring drive and damper. Following the above, the unit to be returned to shop for fitment of special liners for bore wear. B.III No.1. Unit now being fitted with camshaft EX.31550 (similar to B.III No.5) and then returned for power comparison with previous tried shafts i.e. Wraith and B.III. The results of the trial on the above shafts to be analysed and a report given. Wraith III No.4. Tests for cylinder head valve seat cracking. (a) Complete 50 cycles of condition C on coolant jet head remove and examine Cont'd.{John DeLooze - Company Secretary} | ||