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).
Page discussing soundproofing treatments for airliners used by Imperial Airways and Luft-Hansa Co.
| Identifier | ExFiles\Box 138\1\ scan0094 | |
| Date | 18th May 1934 | |
| - 2 - contd:- Ev{Ivan Evernden - coachwork}3/IH.18.5.34. on the latest Air Liner for Imperial Airways, and,also,what treatment is used by the Luft-Hansa Co., who have the reputation for planes with very silent cabins. Ev.{Ivan Evernden - coachwork} | ||