The Z2 was a mechanical and relay computer completed by Konrad Zuse in 1940. It was an improvement on the Z1, using the same mechanical memory but replacing the arithmetic and control logic with electrical relay circuits. Photographs and plans for the Z2 were destroyed by the Allied bombing during World War II. In contrast to the Z1, the Z2 used 16-bit fixed-point arithmetic instead of 22-bit floating point.
Zuse presented the Z2 in 1940 to members of the DVL (today DLR) and it was especially its member Prof. Alfred Teichmann, whose support achieved the partial funding of the successive model Z3.
|Frequency||Ca. 5 Hertz|
|Arithmetic Unit||Fixed point arithmetic unit with 16 bit word length|
|Average calculation Speed||0.8 sec for addition operation|
|Number of Relays||600|
|Memory||64 words (same as Z1)|
|Power Consumption||1000 watts|
|Weight||300 kg (660 lb)|
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- "Z2 Data Sheet". Retrieved 2015-02-09.