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).
Material requirements for light gauge 'Ripple' and 'Ripplet' frames.
| Identifier | ExFiles\Box 113\5\ scan0103 | |
| Date | 17th November 1939 | |
| 1010 SUMMERS - 200 Connahs Quay - To Rm.{William Robotham - Chief Engineer} Les.1/B.17.11.39. The material required for the light gauge "Ripple" and "Ripplet" frame should be 15' long x 32" wide x .064" thick. We suggest that 8 pieces should be obtained. .15 5 .30 / Carbon Les.{Ivan A. Leslie} | ||