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).
Recommending Balsa wood over Rino cork ply wood for the Wraith floorboards due to its superior water resistance.
| Identifier | ExFiles\Box 136\5\ scan0119 | |
| Date | 18th November 1937 | |
| By.{R.W. Bailey - Chief Engineer} c. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork} c. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} 1141 Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}17/JH.18.11.37. re Wraith Floorboards. It is agreed to use wooden floorboards for the Wraith, and silence being equal with Rino cork ply wood and Balsa boards we recommend the latter. Our tests show that the cork ply parts company after being soaked in water while the Balsa wood is never affected. Rm{William Robotham - Chief Engineer}/F.Dodd. | ||