David Hamer has listed the wiring of all of the standard rotors for the
Army and Navy Enigmas. He has also documented the wiring of the rotors in the
commercial version of the Swiss Enigma.
Dr. Hamer has given me permission to include his diagrams in this CD. You
will also find these wiring diagrams in his web pages along with a great deal
of additional material: www.comcast.net/~dhamer/
Wheel Wiring Notch Turnover ETW ABCDEFGHIJKLMNOPQRSTUVWXYZ I EKMFLGDQVZNTOWYHXUSPAIBRCJ Y Q II AJDKSIRUXBLHWTMCQGZNPYFVOE M E III BDFHJLCPRTXVZNYEIWGAKMUSQO D V IV ESOVPZJAYQUIRHXLNFTGKDCMWB R J V VZBRGITYUPSDNHLXAWMJQOFECK H Z VI JPGVOUMFYQBENHZRDKASXLICTW H,U Z,M VII NZJHGRCXMYSWBOUFAIVLPEKQDT H,U Z,M VIII FKQHTLXOCBJSPDZRAMEWNIUYGV H,U Z,M b LEYJVCNIXWPBQMDRTAKZGFUHOS M4 only c FSOKANUERHMBTIYCWLQPZXVGJD M4 only UKW A EJMZALYXVBWFCRQUONTSPIKHGD B YRUHQSLDPXNGOKMIEBFZCWVJAT C FVPJIAOYEDRZXWGCTKUQSBNMHL `Thin' B ENKQAUYWJICOPBLMDXZVFTHRGS M4 only `Thin' C RDOBJNTKVEHMLFCWZAXGYIPSUQ M4 only 1: Notch: location of notch on the index ring. 2: Turnover: letter appearing in window when the notch is engaged with the stepping lever. 3: Wheels Beta and Gamma have index rings but no notches. 4: 'Thin' reflectors B and C are used only in the Model M-4 with Beta and Gamma wheels. 5: All wiring measurements are made - per convention - with Ringstellung = `A'. Alphabets progress clockwise when viewed `through' the Eintrittwalze along the wheel axis.
Wheel Wiring Notch Turnover Input ABCDEFGHIJKLMNOPQRSTUVWXYZ I PEZUOHXSCVFMTBGLRINQJWAYDI G Y II ZOUESYDKFWPCIQXHMVBLGNJRAT M E III EHRVXGAOBQUSIMZFLYNWKTPDJC V N ETW QWERTZUIOASDFGHJKPYXCVBNML UKW IMETCFGRAYSQBZXWLHKPVUPOJN 1: Notch: location of notch on the index ring. 2: Turnover: letter appearing in window when the notch is engaged with the stepping lever. 3: All wiring measurements are made - per convention - with Ringstellung = `A'. Alphabets progress clockwise when viewed `through' the Eintrittwalze along the wheel axis. 4: The Swiss frequently rewired their Enigmas and also modified the stepping of the Army machines. This example is of a Swiss Air Force Enigma. Data acquired by measurement of K797 in 1997 - courtesy Alan Stripp.
Professor Thomas B. Perera
EnigmaMuseum.com