locarno24 said:What's the tonnage for a Boeing 747?
Quick estimate - assume it's a cylinder about 19m diameter by 70m long, and that the wings are a flat metre-thick block about 560m square.
You've massively overestimates the cylindrical diameter. That 19m is from the ground under the wheels to the topmost tip of the tail. The fuselage diameter is more like 7m. That would give it a volume of about 2700 cubic metres for the fuselage, for a total of around 3300 cubic metres, which is 227 displacement tons. I may be underestimating a little, but it's definitely under 300 displacement tons.
About the same as a free trader, but with a lot more sticky-out bits.
Simon Hibbs