The first wind tunnel experiment I helped on was the YF-12 intake. We were sub contracted to Lockheed to run a model of it in our supersonic tunnel. The point went in and out and the petals of the cone behind the spike expanded and contracted to vary the rake of the cone and the gap to the intake rim. The edges of the intake were razor sharp and had to be treated with caution.
Last edited by Ninthace; 23rd Nov 2021 at 21:32.