General notes on materials like Aeroplastics washers, pith for fuselages, and recommendations for improving testing rigs.
| Identifier | ExFiles\Box 127\4\ scan0149 | |
| Date | 19th June 1939 | |
| -3- GENERAL. We were shown a washer made by Aeroplastics. (Spitfire tail unit). This is very thin and incredibly tough, much better than ordinary bakelite. We were also shown some pith used by Fokker's to stuff their aeroplane fusilages with to keep down noise. It is exceptionally light and non-inflammable. Might have been useful to fill Wraith frame. They test their road springs for endurance on cranking machines. We are getting one of these. It was suggested that the reason for the peculiar handling of B.V. with racing tyres might be due to an oversteering characteristic at low sideways g. {Mr Griffiths - Chief Accountant / Mr Gnapp} A good feature of all their testing is that they have dozens of revolution counters and electric motors. Every rig has a cycle counter, this can easily be turned into hours running time by timing the speed of operation. Much time is saved in logging hours, anyone can stop and re-start the rigs at any time without muddling the tests. W. Bell should imitate and we must get counters on our bump rigs. Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} | ||
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).