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).
Page two of a letter from Lake & Elliott Ltd. detailing the results of a test on a safeguarded brake drum.
| Identifier | ExFiles\Box 120\1\ scan0062 | |
| Date | 24th November 1931 guessed | |
| - 2 - The writer saw an independent test made yesterday of a safeguarded Brake Drum in connection with our patented rivetless Shoes at Messrs. Scammell's Works at Watford. The brake was applied continuously until the Brake Drum was red hot, the temperature having reached from 750 to 800 centigrade, and the lining on the brake shoe was incandescent, the revolutions reaching 3,000 per minute. When the Brake Drum cooled down it was found to have become oval to the extent of four thousandths of an inch, otherwise it had remained undamaged, the braking face and safeguarding being quite unaffected by the great heat. This system would be very readily applied to your Brake Drum G.79503, and if you desire it we would machine one of these and safeguard it and send it to you for your inspection. We may add that although we are patenting the process we propose to offer free licences to our customers who use it in connection with Millenite. Assuring you at all times of our best attention, Yours faithfully, FOR LAKE & ELLIOTT, LIMITED. (signed) W.B. Lake. Governing Director. | ||