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NameOmitted
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Joined: Sun Oct 23, 2016 7:59 pm

747-8 wing

Sun Jan 07, 2018 5:09 pm

The 747 intercontinental has significantly more range then the freighter. Passengers appear to be more willing to pay the fuel cost for direct flights.

The MOM/NMA/797 threads all make the point that aircraft designed for shorter range can be more efficient at shorter range (the example used is a 767 beating a 787 on a thousand mile hop).

If Boeing had designed the freighter without consideration of the passenger ship's need or almost double the range, would the end product (and wing) be appreciably different?
 
WPvsMW
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Re: 747-8 wing

Sun Jan 07, 2018 6:07 pm

No, if the F and pax versions have the same payload. Yes, if you change the payload or the range. Payload/range tradeoff, ceteris paribus (TSFC, etc.).
 
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AirKevin
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Re: 747-8 wing

Wed Feb 07, 2018 1:00 am

Generally speaking, any passenger variant of an aircraft is going to be listed as having a greater range than the freighter variant of said aircraft. If both variants have the same maximum take-off weight, the two variables you have are payload weight and fuel weight. A freighter is generally going to be carrying a greater payload weight than the passenger variant, which means that it won't be able to carry as much fuel, which is really what limits your range.
Captain Kevin
 
LH707330
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Re: 747-8 wing

Wed Feb 07, 2018 5:36 am

Freighters are usually quoted with range at MZFW (first kink on the payload range chart), while pax frames are typically quoted with pax+bags range (partway to the next kink). If you load the pax version to MZFW, you'll get similar range (actually, marginally better for the 748i at the same weight because the longer hump yields better area ruling).
 
WIederling
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Re: 747-8 wing

Wed Feb 07, 2018 11:55 am

NameOmitted wrote:
If Boeing had designed the freighter without consideration of the passenger ship's need or almost double the range, would the end product (and wing) be appreciably different?


30t more payload for the 8f and the 8i range is pax + bags while 8f range probably is full payload.( it is a freighter, isn't it :-)
Murphy is an optimist

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