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TAF VIII-2, four-seater Tandem Airfoil Flairboat Typ Jörg II, built in 1983. Following the F&E and test period, Dipl. Ing. Günther Jörg was awarded with the "Phillip Morris Scientific Award" for the Transportation System for the future. Another TAF VIII-2, built in 1994 was given to a Japanese private citizen.
Ekranoplan A-90 Orlyonok. A ground-effect vehicle (GEV), also called a wing-in-ground-effect (WIGE or WIG), ground-effect craft/machine (GEM), wingship, flarecraft, surface effect vehicle or ekranoplan (Russian: экранопла́н – "screenglider"), is a vehicle that is able to move over the surface by gaining support from the reactions of the air against the surface of the earth or water.
The Armstrong-Whitworth Chief Test Pilot Eric George Franklin carried out the test flights. [2] The prone pilot's emergency escape involved a complex procedure which included jettisoning the rudder pedals, crawling backward to an escape hatch and retracting the nose wheel. This system was never used. [1]
The effect of airfoil geometry on dynamic stall is quite intricate. As is shown in the figure, for a cambered airfoil, the lift stall is delayed and the maximum nose-down pitch moment is significantly reduced. On the other hand, the inception of stall is more abrupt for a sharp leading-edge airfoil. [8] More information is available here. [13]
The airfoil is a unique design, which the XL2 shares with its predecessor the Europa. This is a Don Dykins airfoil, designated as a "Dykins 12%", because the wing's maximum thickness is 12% of the chord. The airfoil is a semi-symmetrical, laminar-flow design. The stall warning system is a voice annunciator that says "stall, stall". [4]
Its 25.00 ft (7.6 m) span wing employs a Clark Y airfoil and has a total wing area of 180 sq ft (17 m 2). The cabin width is 26 in (66 cm). The acceptable power range is 150 to 160 hp (112 to 119 kW) and the standard engine used is the 150 hp (112 kW) Lycoming O-320 powerplant. [1] [2] [3]
Doug Atkins then assumed the role of chief test pilot. [7] At about the same time, at the height of the Vietnam War, the US Navy expressed interest in the concept. Atkins was dispatched on a cross-country tour that took a CL-84-1 to Washington DC where he landed on the White House lawn, Norfolk, Virginia , Edwards Air Force Base and eventually ...
XFOIL is an interactive program for the design and analysis of subsonic isolated airfoils.Given the coordinates specifying the shape of a 2D airfoil, Reynolds and Mach numbers, XFOIL can calculate the pressure distribution on the airfoil and hence lift and drag characteristics.