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).
Methods to prevent 'booming' noise in car bodies, including ventilators, roof stiffening, and coil springs.
| Identifier | ExFiles\Box 41\3\ Scan240 | |
| Date | 12th December 1922 guessed | |
| contd:- -3- by longitudinal slats to prevent damage. Ventilators are often fitted to roofs to prevent booming and are sometimes successful, possibly due to there being an outlet having an orifice co-efficient, but also possibly because of their being fitted the roof has to be stiffened. The Cunard Co., are now advertising that they will cure any car from booming by setting up coil springs between the roof and sticks. In conclusion we might say that whilst one can do a lot of protecting the body from chassis vibrations, yet it is difficult to protect it from disturbances arising from air waves, and the root of the trouble to be remedied appears to lie in finding non-booming construction for the body. DA{Bernard Day - Chassis Design}/EV.{Ivan Evernden - coachwork} | ||