Can't they just fit some tights around the front of each jet engine (with some elastic bands or suchlike) so that air can get sucked in but ash particles don't?
I once got a 'B' in O-level applied physics. Back in the day when exams were still difficult
Not even if Wallsall hadn't conceded 2 in last 3 mins? Not even if Millwall had played like a top 3 side yesterday? Not even if we had then won today? We weren't that far off this week. Fact. :-)