ENIGMA ROTOR WIRING

David Hamer Ph. D. (Copyright (c) 2004, 2015)


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/



Wiring of Enigma Wheels [I - VIII, b and c]

David Hamer Ph. D. - dhhamer(at)comcast.net
Copyright (c) 2004, 2015

        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.


Wiring of `Swiss' Enigma Model 'K'- [see note #4]

David Hamer Ph. D. - dhhamer(at)comcast.net

Copyright (c) 2004

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.



If you would like to contact Dr. Hamer, you may email him at: dhamer(at)comcast.net


Professor Thomas B. Perera
EnigmaMuseum.com

Internet On-Line Telegraph & Scientific Instrument Cyber-Museum:
http://w1tp.com
Internet ENIGMA Museum: http://EnigmaMuseum.com/