Brian W May, I don't know whether you've ever served on a jury, but when I did so, the judge took great pains to explain to the members of the jury that they were ONLY to consider the evidence presented and nothing else. Which includes 'Internet research' et al. So I cannot imagine for one moment that the evidence was presented in anything but a clear manner, sufficient for judge and jury to have full understanding. That the jury might have known 'diddly squat' about flying is frankly nihil ad rem.
When I was foreman of the jury on which I served, I had to remind some members of the judge's statement regarding consideration of evidence, including that we could only discuss the case when all members were present. If someone needed to go to the lavatory, then no discussion of the case could continue.
The jury in Andy Hill's case has given its verdict. Who are you to query that?