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).
Engine endurance test schedule for exhaust system comparisons on a Phantom III unit.
| Identifier | ExFiles\Box 155\2\ scan0196 | |
| Date | 27th January 1938 | |
| -4- Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 1/JH..27.1.38.. 30 mins. 4,000 R.P.M. 25 mins 4250 and 5 mins 4500. Every 5 hrs. to comprise 3 1/2 hrs. full throttle. 1 hr 1/2 load. 1/2 hr 1/4 load. B.23. O.H.C. Following endurance on Phantom III this unit will be ready to continue exhaust system comparisons. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||