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).
Instructions for re-testing and heat treatment of six special connecting rods.
| Identifier | ExFiles\Box 76\3\ scan0046 | |
| Date | 23th March 1918 | |
| R.R. 663. (1 doz.) (SD. 185. 8-2-17.) Bm. 2/125/17. ROLLS-ROYCE LIMITED. INSTRUCTIONS To Mr Hives for Experimental Works. Order No. Customer's No. Laboratory Date: 23rd March 1918 Re testing of con. rods from our conversation yesterday I consider that we should have 6 special rods forged. ie two in M.S & four in N.S. The former should be forged as usual & then quenched out from 930°C in water & tempered 500°C (This treatment should leave it in rather unsatisfactory state owing to insufficient drawing.) Brinell about 260 Two of the N.S. should be purposely over heated in forging (say to 1100°C) & heat treated as usual for 30Z The other two should be forged under normal conditions & then heat treated 880°C in oil & tempered as usual to Brinell of about 302. Signed I.H.S. This Sheet must be filed on completion of the work. | ||