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).
Comparison report on the material properties of Bakelite and Elo.
| Identifier | ExFiles\Box 39\3\ Scan128 | |
| Date | 14th July 1921 guessed | |
| -3- Contd. The foregoing tests show that the Bakelite is superior in almost every respect to the Elo, particularly as in the first instance it had a much better finish. It has not been possible to test the dielectric strength of these materials, but in any case, this would seem to be a consideration of minor importance for most the work/which they are required. It seems quite possible that if the Elo were put under higher pressure whilst in the mould, it would have better finish, and be stronger, denser, harder and less absorbent, thus comparing more favourably with the present sample of Bakelite. It is suggested that the coil disc used in the above tests be made the regular test moulding for comparing various moulding materials moulded by ourselves, especially in the absence of definite measurements of temperature, etc. A sample of Elo, moulded by the suppliers is just to hand. It is noted that this has a smooth finish and fine fracture, comparable with Bakelite. It also just sinks in acid of 1350 density. F.J.A. | ||