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The Penalty of Wing Sweepback on Low Subsonic Airplanes
Extra vertical tail length is obtained in canard configurations with wing-tip – mounted vertical tails by using wing sweepback. While we have learned how to provide good stall characteristics and a stable pitching moment stall break on sweptback wings,
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Figure 17.1 Drawings of the tail-last Beech Super King Air B200 (above) and canard Starship 1 (below). The two airplanes are of similar size and gross weight, but the B200’s vertical tail length is 40 percent greater than the Starship’s. (From Jane’s AH the World’s Aircraft, 1987-1988) |
these come at a cost in wing twist, special airfoil sections, or stall control devices such as slats, fences, and slots. Thus, wing sweepback used on a canard configuration to improve directional stability and control brings cost and weight penalties relative to tail-last configurations.
