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 from Triplex Safety Glass detailing manufacturing tolerances for wrap-around windscreens and backlights.
| Identifier | ExFiles\Box 26\1\ Scan183 | |
| Date | 5th February 1957 guessed | |
| - 2 - inverse curvature across the sharply bent region. Tolerances The tolerances we should expect to work to on wrap-round windscreens and backlights of the type shown on your drawings, but within our recommended limits of radii, would be:- Total length round bend +0 -⅛" Total depth (width at centre line) +0 -⅛" Curvature 3/16" Cross curvature ±⅛" We should be glad if you would give further consideration to your designs with a view to modifying the radii to fall within our recommended limits and so make the glasses simpler to produce to the desired accuracy. Yours faithfully, for TRIPLEX SAFETY GLASS CO. LTD. (signed) H.{Arthur M. Hanbury - Head Complaints} Gough, Tooling & Development Engineer. | ||