gebeurede vroeger veel vaker en met verschillende typen

Lockheed Tristr https://www.reddit.com/r/WeirdWings/...ine/?rdt=37692
Boeing 747-200 https://historyofpia.com/board/july_06/apayw_july8.jpg
Boeing 747 -400 https://www.facebook.com/photo/?fbid...81236772149335
McD DC-8 (maar of dit een motor is?? ) https://historyofpia.com/board/july_06/apayw_july8.jpg
VC-10 https://www.vc10.net/Technical/Image...ifthengine.jpg
Boeing 707 https://simpleflying.com/aircraft-extra-engine-on-wing/