The end plate restricts the cross-flow near the wingtip, and this also weakens the tip vortex. It acts as a fence that opposes the spanwise flow near the tip of the wing.
End PlatesĪn end plate is a thin flat plate mounted at or near the tip of the wing, perpendicular to the wing surface and parallel to the airflow. The two classes of tip devices are end plates and winglets. The trade between parasite drag due to wetted area and reduction in induced drag is a function of the flight condition of the airplane and will determine whether it is appropriate to incorporate a tip device. These devices function as barriers to the cross-flow near the wingtip or manipulate the cross-flow in the vortex itself in order to weaken the vortex and/or recover energy from the swirling flow.īoth types add wetted area to the airplane, and hence increase parasite drag at the same time as their influence on wingtip airflow reduces induced drag. There are two types of wingtip aerodynamic devices that go a step beyond a planar tip and seek to directly manipulate the cross-flow at the tip to alter the formation of the tip vortex. This month we’ll look at two types of wingtip aerodynamic devices that go a step beyond a planar tip and seek to directly manipulate the cross-flow at the tip to alter the formation of the tip vortex.
Last month we saw how tip planform and shaping can affect formation of the tip vortex and the effective span of the wing. The combination of the downwash behind the wing itself and the upward flow just outboard of the tip causes the air to wrap up into a vortex that sheds aft of the tip of the wing. Just inboard of the tip the wing deflects the air downward, while outboard of the tip the air is driven upward by the pressure difference between the top and bottom of the wing. The pressure on top of the wing is lower than the pressure on bottom.Īt the wingtip, the wing disappears to the air, removing the barrier between the two pressure zones. (Photo: Leonardo Correa Luna)Ī wing produces a pressure difference between its upper and lower surface. But to be honest the Hexagon3D model has a lot more detail.An end plate increases the amount of lift the wing generates at a given angle of attack and reduces the induced drag of the wing. Which is about 1/10 the time it took me to model in the Ford flathead V8 in Hexagon3D. I need to add some more details like a fan belt, alternator, starter, spark plug wires & oil filter. And I used a 1/6 diecast scale model of a 1930s to early 1950s Ford flathead V8 as reference which is sets on a shelf in my computer room among near 80 other diecast models of cars (mostly vintage) of varying scales from 1/24, - 1/8th & 1/6th. The previously V8 engine I modeled was doing completely in Hexagon3D. And influenced by the 1960s Chrysler Hemi and the the Ford Boss 429 of the late 1960s & early 1970s. Using beta 4.9.44 I thought I would like to model a V8 engine completely in the voxel room. I decided to kill my afternoon with 3DCoat. A 1960 Corvette which I restored in 1983 and still own. After this morning's yard work (tearing up dead bushes, raking leaves), visiting my Mother's gravsite and going to the grocery store I was too tired to actually replace the fuel lines on my own antique car.
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