Original sentence: A lifting-canard generates an upload, in contrast to a conventional aft-tail which generates a downward lift force that must be counteracted by extra lift on the main wing.A static horizontal stabilizer may be placed either behind the center of mass, as a tailplane, or forward of it as a canard foreplane.Again, the relative merit depends on the details of the configuration and cannot be generalized.Another example is that the upward canard lift appears to increase the overall lift capability, however, flight safety requirements dictate that the canard must stall before the main wing.Hence, the main wing must then be larger than on the conventional configuration, which increases its weight and profile drag.However, the downwash interaction between the two surfaces is unfavorable for the canard, and favorable for the conventional tail, so the difference in overall induced drag is actually not obvious, and depends on the details of the configuration.Pitch stability requires that the lift slope of the canard wing is lower than the lift slope of the main wing : to achieve stability, the change in lift coefficient with angle of attack should be less than that for the main plane.. The first powered airplane to fly, the Wright Flyer, a lifting-canard, was pitch unstable.The main wing can never reach its maximum lift capability.The pros and cons of the canard versus conventional configurations are numerous and complex, and it is impossible to say which is superior without considering a specific design application.This may appear to unambiguously favor the canard
Edited sentence: The first powered airplane to fly, the Wright Flyer, a lifting-canard, was pitch unstable