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 the suitability of Perspex for car windows and enquiring about a thin glass alternative used for aircraft.
| Identifier | ExFiles\Box 117\4\ scan0084 | |
| Date | 18th July 1941 | |
| 1081 Rm{William Robotham - Chief Engineer}/EAG.1/SW. 18th July, 1941. J.W. Follett, Esq., 1, Albermarle Street, Piccadilly, LONDON W.1. Dear Mr. Follett, Thank you for your letter of July 16th, with reference to "Perspex" for body lights. You have confirmed my opinion that the surface of "Perspex" would scratch too easily for use on car windows. We can only hope that some of the Technical people discover a means of hardening the surface so that we can make use of it for cars. You did not answer my questions regarding dis-colouration , shrinkage and expansion. I understand that you supply a specially thin glass for aircraft, it has been suggested that we might use this. Could you let me know what the saving in weight of this material is compared with the ordinary 3/16"? What is the thickness, and what is the additional cost per foot compared with the 3/16"? I take it that it is a laminated glass and not toughened. Yours sincerely, FOR ROLLS-ROYCE, LTD., | ||