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747-400 Design

Jamie4590 Guest

You will notice about halfway along the fuselage the roof of the aircraft dips down and remains so along to the rear. I'm interested to know why this is and if its a crucial design feature?

Pro Member Chief Captain
CRJCapt Chief Captain

I think it's that the upper line of the fuselage goes up near the forward end because the 747 has a upper deck in the passenger compartment. Smile

Pro Member Chief Captain
Jonathan (99jolegg) Chief Captain

Jamie4590 wrote:

You will notice about halfway along the fuselage the roof of the aircraft dips down and remains so along to the rear. I'm interested to know why this is and if its a crucial design feature?

Yes, the upper deck is the first class compartment. It doesn't extend all of the way down the fuselage because the aircraft would be too heavy for the current 4 engines and current wingspan.

Jamie4590 Guest

I put it the wrong way round. Great demonstration pic Jon! Wink

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VegasFlyer Chief Captain

I like the design of a jumbo very much. Smile

Pro Member Chief Captain
pilotwannabe Chief Captain

It was designed that way because the craft was originally meant for cargo only...Boeing thought everyone would be flying supersonic with the advent of concorde. Obviously the "hump" means that more cargo can be contained in the lower deck and the nose can be raised for easier and quicker loading and unloading Wink

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