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).
Letter requesting a special pair of Phantom I front springs with detailed specifications for urgent tests.
| Identifier | ExFiles\Box 67a\2\ scan0258 | |
| Date | 17th December 1929 | |
| Experimental Department, December 17th.1929. RHC{R. H. Coverley - Production Engineer}2/BE. J.{Mr Johnson W.M.} Wortley Fawcett Esq., Messrs. Thomas Firth & Sons Ltd., Norfolk Works, SHEFFIELD. Dear Sir, We require for urgent tests, a special pair of Phantom 1 front springs. The springs are to be similar to A.8545 - G.4541 - G.4632, except that the secondary leaves will be thinner and will have greater initial camber. Springs should have 4.5" free camber and give 4.5" deflection at 1125 lbs. load. We think the reduction in rating can be obtained by grinding .015" off each leaf. The first five leaves of these springs should be grooved and drilled similar to the present Phantom ll F.80880. Below we give particulars in detail:- Loaded lbs.......... 1125 (handwritten: 1088) Loaded camber....... flat. Length............. 43 1/4" Initial camber..... 4 1/2" (handwritten: 4.720) No. of leaves...... 14. Thickness of leaves. Main....... .250" (handwritten: 250) No.2....... .215" (handwritten: 209) No.3....... .215" (handwritten: 212) No.4....... .205" (handwritten: 198) No.5....... .200" (handwritten: 198) No.6....... .200" (handwritten: 198) No.7....... .200" (handwritten: 198) No.8....... .200" (handwritten: 200) No.9....... .175" (handwritten: 175) No.10...... .175" (handwritten: 175) No.11...... .175" (handwritten: 175) No.12...... .155" (handwritten: 152) No.13...... .155" (handwritten: 152) No.14...... .155" (handwritten: 155) We shall be glad if you will kindly deal with this as quickly as possible. Our official order will follow. Yours faithfully, (Handwritten note at bottom) Measured Spring dimensions pencilled in. | ||