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It employed the first winglets ever used on a production aircraft, either civilian or military. Learjet developed the winglet design without NASA assistance. Although the Model 28 was intended to be a prototype experimental aircraft, performance was such that it resulted in a production commitment from Learjet.
A variable-sweep wing allows the pilot to use the optimum sweep angle for the aircraft's speed at the moment, whether slow or fast. The more efficient sweep angles available offset the weight and volume penalties imposed by the wing's mechanical sweep mechanisms. Its greater complexity and cost make it practical mostly for military aircraft.
The Spiroid winglet is a closed wing surface attached to the tip of a conventional wing. Wingtip vortices form a major component of wake turbulence and are associated with induced drag, which is a significant contributor to total drag in most regimes. A closed wing avoids the need for wingtips and thus might be expected to reduce wingtip drag ...
Winglets have the opposite effect to washout. Winglets allow a greater proportion of lift to be generated near the wing tips . (This can be described as aerodynamic wash-in.) Winglets also promote a greater bending moment at the wing root, possibly necessitating a heavier wing structure.
Theoretically, the most efficient way to create lift is to generate it in an elliptical spanwise distribution across the wing. [1] There is no inherent superiority to pure elliptical shapes and wings with other planforms can be optimized to give elliptical spanwise lift distributions.
The military diet plan is a restrictive way of eating for weight loss, per dietitians. Here, find the plan’s pros, cons, safety info, and meal examples.
Like any source of retirement income, annuities have their pros and cons. Understanding these can help you make an informed decision about whether an annuity is right for you. Advantages of ...
A rendering of the US Air Force blended wing body aircraft project. A blended wing body (BWB), also known as blended body, hybrid wing body (HWB) or a lifting aerofoil fuselage, [1] is a fixed-wing aircraft having no clear dividing line between the wings and the main body of the craft. [2]