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).
Drawing for a square Matrix Tube with annealing and pressure test specifications.
| Identifier | WestWitteringFiles\W\May1931-August1931\ Scan020 | |
| Date | 22th May 1931 | |
| TUBES TO BE ANNEALED BY THE SUPPLIERS AGAINST SEASON CRACKING ONLY. LENGTH OF TINNING .300 +.50 .250 +.25 7/16" M/M +1/64" -0" SQUARE .007 .050 RAD. INSIDE OFF FACE PIECE 4.000 EACH TUBE TO BE TESTED TWICE & NOT BY THE SAME OPERATIVE. FIRST BEFORE BULGING. SECONDLY AFTER BULGING BY AN AIR PRESSURE OF 15 LBS PER SQ INCH THE TUBES BEING IMMERSED IN WATER ON EACH TEST FOR A PERIOD OF NOT LESS THAN 5 SECONDS SCALE: 2/1 HEAT TREAT: BRINELL TITLE: MATRIX TUBE MATERIAL: SEE L.O.P. STATION: STANTON SPEC'N No: B 2151 C 2138 DATE: 22.5.31 USED ON: 40/BO SECTION: 5250 TRACED: M.L. | ||