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 providing power specifications for a 1913 model 40/50 HP 6-cylinder engine for installation in a motor boat.
| Identifier | ExFiles\Box 142\1\ scan0256 | |
| Date | 17th October 1938 | |
| 1204 Experimental Dept. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby} 17th. October 1938. M.Poul Knudsen, Faergevej, Frederikssund, DENMARK. Dear Sir, We are in receipt of your letter regarding the installation on one of our 6-cylinder engines in your motor boat. From the number given, 2349, this is a 1913 model 40/50 H.P. engine. The power given by this engine under full throttle conditions are as follows:- Revs/min. Horse Power. 500 - 24 1000 - 42 1500 - 55 1750 - 55 The drive should be arranged so that the engine does not exceed 1750 R.P.M. under any conditions. We would say that the most economical conditions regarding the petrol consumption would be at about ¾ throttle running at about 1500 revs/min. Hoping this fulfils the information you require. Yours faithfully, for ROLLS-ROYCE LTD. | ||