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).
Comparing the costs and weight implications of different brake systems, including Lockheed and Girling.
| Identifier | ExFiles\Box 121\1\ scan0284 | |
| Date | 27th May 1940 | |
| 1029 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} c. to Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. to Ev{Ivan Evernden - coachwork}/Bastow. Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby}2/JMc.27.5.40. Rippletto Brakes - Prices. The price of £4 10s 0d. quoted by Lockheeds for their projected 2 leading shoe all hydraulic lay-out, exclusive of hand and pedal levers and rods, can hardly be compared with the cost of our own systems whether with hydraulic or mechanical front brakes. The costing department did not consider it worth while to go into details, as the price is of the order of £35, or at the best on production £25. At present the cost of one set of Girling Expanders and adjusters is £3 10s 0d, and the servo motor alone costs about £10. Shoes, linings and springs come to £1 0s 0d, and the rest of the cost is in the levers, rods, equalisers, rear cross-shaft etc. The change-over to the Lockheed system would also reduce the weight from 88 lbs. to 75 lbs. approximately. Rm{William Robotham - Chief Engineer}/MHR.{M. H. Rigby} | ||