Good stuff guys, thank you. If some of you have experience of these cars side by side on a 767/A300, that gives me something to work off.
Vehicle height is 195.5 cm, in an area with max height of 250cm, so fair points from the guys who mentioned the curvature, but it sounds like it can be done.
I need to fit 10-12 to make it financially viable. Bulkhead areas could be used for relief/medical items, I'd hope, plus belly space.
JUB ramp/parking is like a gravel car park, frequent high-speed stones breaking windshields and damaging control surfaces from prop/jet blast, wing scrapes, etc. I'm told 747s do not land here at all, too heavy.
Now the challenge is to find an operator who will fly into JUB from Europe.