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UKGuy1805
reply to post by Zaphod58
I was being sarcastic, an intact plane can not fly through concrete and steel, mite do some damage yes, but not phsicaly fly through it, remember that test with a F4 Phantom being slammed into a slab of concrete, remember how the plane was totally destroyed turned into mush and a zillion pieces.
Merlyn2014
reply to post by BillYenne
Level 1-15 were built by us, level 16-27 were already present.
wmd_2008
UKGuy1805
reply to post by Zaphod58
I was being sarcastic, an intact plane can not fly through concrete and steel, mite do some damage yes, but not phsicaly fly through it, remember that test with a F4 Phantom being slammed into a slab of concrete, remember how the plane was totally destroyed turned into mush and a zillion pieces.
Sorry but apples with apples the concrete block you go on about (which was a few feet thick!) was NOT what the twin towers were made of, the test was done iirc to see what would happen if an aircraft struck a nuclear powers station now since concrete mix in such situations can include ball bearing, cut up engine blocks etc it's not the same as structural concrete used in buildings !
The towers had VERY LITTLE structural concrete apart from the foundation pads, the floor slabs had 4" of a lighter weight floor mix and if you bother to look at the images of the impact areas on the towers you can see how the steelwork failed at column tree joints, oh by the way I worked in the design and drawing office for a STRUCTURAL steelwork company for a few years when I left school and have worked in construction for 30+ years.
Aircraft are stronger than you think they have to survive the stresses of flying at speed with quite a mass on board between fuel, passengers & luggage.
edit on 9-4-2014 by wmd_2008 because: (no reason given)