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).
List of raw materials and their weights required to manufacture a 40mm gun.
| Identifier | ExFiles\Box 176\3\ img126 | |
| Date | 20th August 1940 guessed | |
| COPY. WEIGHT OF RAW MATERIAL REQUIRED TO MAKE 1 - 40 mm. GUN. (LESS MOUNTING) Material Specification. Weight of Raw Material. S/M - BSS. S77 72 lbs. S/N - BSS. S69 52 " S/ZN - BSS. S67 40 " S/NCR - 4 - S - 11 160 " S/ZNCR - BSS - S - 82 12 " V.C.M. DTD 228 20 " V.C.M. S.28. 1 " VIBRAC V.30 STEEL 32 " AMT 50 - 4% C. STEEL 4 " S/GS - DTD 5A 5 " S/GS S 65 1 " VIBRAC - BARREL STEEL 450 " CAST IRON 4 " A/F - BSS - L - 40 68 " A/C - DTD 133 B 200 " BZ/PC - BSS - 2-B-8 14 " BZ/G - BSS - 2-B-2 2 " COPPER - BSS T - 7 6 " RUBBER - OIL RESISTING 1 " BRASS - BSS - 3-B-13 14 " BZ/AF DTD 164 1 " Total ... 1149 lbs. ACTUAL WEIGHT OF BARREL = 450 lbs. Forging (50 guns) Previous 1 off. = 700 lbs. Forgings. | ||