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Old 2nd Dec 2009, 10:01
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kenparry
 
Join Date: Feb 2003
Location: Brighton
Posts: 977
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The short answer is "as little as possible". Why? Because the "span" of the fuselage is small, so any lift it does produce has a significant penalty in induced drag.

A slightly longer answer is that it depends on the aircraft's angle of attack, which in turn depends on airspeed, flap setting, and manoevring load ("g"). In the cruise, those types fly typically at around 2 or 3 degrees nose-up, so that is the angle of attack of the fuselage, and fuselage lift will be small. In the initial climb, the body angle can reach 20 deg nose-up, and the angle of attack perhaps 10 degrees, but IAS is relatively low.

Figures? Too difficult, not enough data available.
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