Was Evans & Sutherland CT5 really created in 1981?
The CT5 was designed before 1981. I started working at E&amp;S in May 1981. The CT5 was fully designed by then and 3 had been built. All 3 were still at E&amp;S and hadn't shipped yet when I started. Two of them were on the test floor and the third was the engineering prototype that was later sold. The prototype was in the "snake room", so called because of all the black power cords hanging from the ceiling. I also remember seeing the prototype in the snake room when I made a recruiting visit to E&amp;S in early January 1981. So, the prototype, at least, was up and running before 1981.

The first two CT5 systems were CH-46 helicopter simulators and the first one went to Cherry Point NAS. I don't think it shipped in 1981 as I remember it being there on the test floor for about a year after I joined the company. So, it probably shipped in 1982. As I recall, the two systems built after the CH-46 systems were AV8B Harrier jet simulators.