The model-makers were very good. They quickly made the parts and we rattled through a programme. We were using the Southampton wind tunnel, the 7ft × 5ft working-section tunnel that I’d first encountered as a student. Here I was, eight years later, still there, my familiarity with the surroundings no doubt helping to make this one of those development programmes that just seemed to work. Not everything, of course. It wasn’t as though every drawing resulted in a component, but we had a pretty good hit rate.
