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).
Weight figures for bonnets to resolve issues with stiff bonnet springs.
| Identifier | ExFiles\Box 25\1\ Scan072 | |
| Date | 12th January 1915 | |
| B) (WW. 968. 17.11.14.) E.P. 7593. ROLLS-ROYCE LIMITED, NIGHTINGALE ROAD, DERBY. TELEGRAMS: "ROYCAR," DERBY. TELEPHONES: 476 (Four Lines). Names and Indicating letter. Initial of person addressed. [List of names from A to Wor{Arthur Wormald - General Works Manager}] Handwritten note next to list: Wor.{Arthur Wormald - General Works Manager} for Exptl. Dept. Sheet 2. XC1140 12.1.15. E2/G12115 Contd. the universal bonnet on Mr. Royce's car, and a standard bonnet in the Test Dept. Would you kindly let us have these figures at the earliest possible moment as we are listing up all material for "H" series on this Job, and are anxious to avoid a recurrence of the trouble of stiff bonnets, and these figures will enable us to definitely tie up the spring makers within working limits. E.{Mr Elliott - Chief Engineer} [Signature] [Handwritten Reply:] Wor{Arthur Wormald - General Works Manager} The average weight the bonnet springs on 49GB will hold up is 14 to 15 lbs on a standard chassis these springs hold 4 to 5 lbs. On the standard bonnet there are 4 springs instead of three as on 49GB [Signature] This sheet must be filed with the correspondence to which it refers. | ||