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Taxi645
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wingspan - fuselage width- induced drag

Mon Feb 10, 2020 9:54 am

I have a question on the relation between wingspan, fuselage width and induced drag.

Many airplanes are designed to stay within a certain gate size. If within a given wingspan you change the fuselage concept, for instance narrowbody vs. widebody, this will have an influence of the length of the wing (the actual length of the aerodynamic profile) as wing length is ~ (wingspan - fuselage width):2

The question comes down to; what does actually influence induce drag (more), total wingspan or the actual length of the wing profile?

If it is the latter that would mean than within a given wingspan a wider fuselage would produce (slightly) more induced drag.
Innovation is seeing opportunity before obstacle.
 
Lpbri
Posts: 207
Joined: Tue Sep 27, 2016 7:18 pm

Re: wingspan - fuselage width- induced drag

Mon Feb 10, 2020 5:31 pm

The induced drag coefficient varies inversely with wing aspect ratio. And it varies with the square of lift coefficient. Although the fuselage does produce some lift, how it affects total induced drag sounds pretty complex to me.
 
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Taxi645
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Posts: 336
Joined: Wed Feb 22, 2017 7:29 pm

Re: wingspan - fuselage width- induced drag

Thu Feb 13, 2020 11:38 am

Lpbri wrote:
The induced drag coefficient varies inversely with wing aspect ratio. And it varies with the square of lift coefficient. Although the fuselage does produce some lift, how it affects total induced drag sounds pretty complex to me.


Same here, hense the question.
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