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 clarifying the circumference dimensions of a fan belt from drawing EW.1518.
| Identifier | ExFiles\Box 135\1\ scan0139 | |
| Date | 7th March 1938 | |
| 1/35 March 7th.1938 Rm{William Robotham - Chief Engineer}/Std.1/AP. Messrs B.N.Purdy, Leyland Street Mills, DERBY. For the attention of Mr.B.N.Purdy. Dear Sirs, Referring to your letter of the 4th inst., our drawing EW.1518 gives the length of our fan belt, which is, as you suppose, an endless one. Actually when the belt is in its free state i.e. circular, the outer circumference should be 47.4", which with the belt section given on drawing gives an internal circumference of 44.250" Yours faithfully, FOR ROLLS-ROYCE LTD. | ||