Wraith rear road springs, comparing suppliers Firths and Woodheads, and outlining new specifications.
| Identifier | ExFiles\Box 9\5\ 05-page139 | |
| Date | 24th November 1937 | |
| Rm. {William Robotham - Chief Engineer} Rm. {William Robotham - Chief Engineer} /S BY.5/G.24.11.37. 646 WRAITH - REAR ROAD SPRINGS. In view of the facts so far ascertained in connection with springs supplied by Firths and Woodheads respectively, there is no reason so far disclosed why we should favour Woodheads rather than Firths. The one point in favour of Woodheads was apparently increased durability, but this is undoubtedly due to the fact that their springs had polished top plates, whilst Firths had been instructed they must neither grind nor polish, but quote for springs produced from bar "as rolled". We will now in view of my decision to insist on ground and plated top plates, and the further change resulting from today's discussion, namely on upturned rear eye, for its intrinsic economy with no corresponding debit in strength, prepare drawings covering today's decision, viz. plain centre bolt, upturned rear eye, top plate ground and plated, the amount of grinding to be at least .010 per side, and obtain quotations from both Companies for similar quantities. Under these circumstances we will then be able to make an accurate estimate of what each of the concerns can supply on a reasonable profit making basis. By BY. {R.W. Bailey - Chief Engineer} | ||
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).