The Newmanry History

38 Page 293



38 - WHEEL-BREAKING FROM KEY, ORGANISATION

In the early days of Tunny work when all monthly keys were broken on

After P5 limitation was introduced on most of the links normally tried

No great advances were made until the autumn of 1944 when X2 PSI1

Therefore, by 1945, the resources and staff employed in the breaking of

A skilled key-breaker in Room 41 (and assistant)

The Wheelsman

The Rectangles Registrar and up to 6 computers.

1 Garbo, 1 handperforator and operators in Room D.

1 Colossus with wheelbreaker and 1 or 2 operators to
assist him.

Work on Turingery in Room 41 involved very little organisation as each job

Certain members of Room 41 took a particular interest in key-breaking and

Unfortunately the specialist key-breakers did not work on a three shift

The flagging of such rectangle was done by one computer, and one computer

It proved profitable for the computer adding the flags to record entries

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