Kevin Owens · Enigma and Turing's machine · The story · Enigma · The machine · 3D view

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The test register's lamps: the wires live on the central letter's bus; one lit, or all but one, is a stop108 drums, 36 Enigma scramblers: top II maroon (left rotor, the fast drum), middle V brown, bottom III green; 13 are wired to the menuThe back, opened: eleven wired scramblers' 26-way jacks cabled to their letters' commons, each commons to the diagonal board's rear, the test register to E; the two at the bay's jack plate go straight into the board's frontThe menu on the side plate: its 13 wired crib positions are the 13 cabled scramblers, each wired oncePaletteThe same machine as Fig 2, seen in 3D and opened at the back. Every number here is the SVG figure's: the cabinet (about 7 ft wide, 6 ft 6 in tall, 2 ft deep), the 108 drums in three banks of twelve vertical triplets at the same column and row spacing, the test register's 26 lamps, the indicator, the stop lamp, the central-letter dial, the menu plate and the open bay are built from the layout that file draws, and the drums, lamps, indicator, stops and readout are posed every frame by the same tested model, run on the WETTERVORHERSAGE job. The drums are instanced, colour-coded by rotor (II maroon on top, V brown, III green), each with its 26 letters on its face. What 3D adds is the back, where the real machine was wired: the menu's central piece has 13 crib positions, so 13 scramblers are cabled, each once. Two of them, A–R at 14 and G–B at 15, are the ones Fig 5 wires at the bay's jack plate, straight into the diagonal board's front sockets, and they are drawn there as that figure draws them. The other eleven are cabled on the back, each by its two 26-way jacks to the commons of its two letters (E collects five, R four, T three, G and Z two, the rest one), each commons by one cable, run along the cabinet floor behind the kick rail and up outside the open back, to its letter on the rear of Welchman's diagonal board; the test register is cabled to E, the central letter. Orbit round and the menu on the side plate becomes the cables behind it. Taking the board out (Turing's 1939 machine) unplugs every cable to it, front and rear, and the sweep stops 707 times instead of twice (DBC, a false stop the checking machine rejects, and QQM, the true core position). Simplifications: the commons are drawn as one rail of sockets and the cable routes as tidy lanes, not from a wiring drawing of the machine; the drum spindles and the brushes behind the front panel are not drawn; the motor, belt and guard are an illustration, as in Fig 2. It opens in the SVG's own view (orthographic, azimuth 62°, elevation 24°) and can be orbited: drag to turn, wheel or pinch to zoom, I or the button to snap back, V for the back; left alone it revolves slowly. Faces are shaded by the kit's four-tone rule from one light that follows the camera, and outlines are the solids' edges and silhouettes.

Running the machine · wheel order II-V-III · menu from the crib WETTERVORHERSAGE · central letter E