End of Pilot ACE- Jun 1956

After the delivery of DEUCE machines to both NPL and the Royal Aircraft Establishment in 1955, the load on Pilot Ace began to ease.

One of the more unusual problems tackled that year was the mathematical description of the rapid freezing of a slab of fish packed between two cooling surfaces: it was required to find the time elapsed before the central part of the slab was cooled below a prescribed temperature, the problem being complicated by the latent heat given up as the fish froze. Another new application was the verification of theories regarding the mixing of fresh and salt water in the Thames for the Water Pollution Research Laboratory

The reduction in demand from other organizations as they acquired their own computers, and the greater reliability of DEUCE led to the close down of Pilot ACE on Jun 1956 after four and a half years of yeoman services to the UK science and engineering community.