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 advising against the use of toughened glass for car screens due to safety concerns following recent experiments.
| Identifier | ExFiles\Box 137\5\ scan0161 | |
| Date | 18th June 1934 | |
| x673 Copy to: Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} EP.{G. Eric Platford - Chief Quality Engineer} E.{Mr Elliott - Chief Engineer} Ev{Ivan Evernden - coachwork}9/BE. 18th June, 1934. Messrs. Park Ward & Co.Ltd., 473, High Road, WILLESDEN, N.W.10. Dear Sirs, Re Toughened Glass. We believe that it has been intended to fit Toughened Glass in S.B.4. and 30.EX. In view of recent experiments of which I have received a report, as follows:- "It will be recalled that samples of Toughened Glass, on being struck with force, disintegrated in numerous small blunt pieces. "Unfortunately, Mr. Evans' tests disclosed that this disintegration does not take place when the glass is held in a frame as it is when used in a windscreen. "When in a frame and the glass is struck, it cracks up into numerous small pieces of the usual size, but the small pieces stay in position, with the result that the screen becomes opaque, which might prove highly dangerous at speed, and makes it highly unsuitable for car screens." we would be glad if you would use no more of the glass on cars for experimental use, and particularly for those mentioned above. Yours faithfully, For ROLLS-ROYCE LTD. | ||