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).
Letter discussing a sheet of curves, the workmanship of a jet control mechanism, and an optimum touring speed.
| Identifier | ExFiles\Box 78\1\ scan0137 | |
| Date | 17th April 1929 guessed | |
| I attach a sheet of curves - they are probably stale news to you - in case they might interest you. They contain many interesting points, chief perhaps being the amazing workmanship shown in the construction of the jet control mechanism. They were taken a year or two ago. The various measurements entailed were accurate. They verify quite definitely that 30 mph. is the optimum touring speed. Sorry to have inflicted such a lengthy screed on you. Yours faithfully, Oliver [signature] | ||