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A teardrop shape?
The most streamline shape is the teardrop-shape or the better known as the aerofoil.That is the reason why the airplane body and wings is shaped like a teardrop.This shape reduces air pressure on the object thereby increasing air flow in return increasing the speed of the body.
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I suggest a 3-dimensional star shape, each of whose faces are not plane but concave.
They are not shaped like cones, but their shape makes them more aerodynamic which increases flight speed and distance.
Many formula 1 racing car designers and aircraft designers have found the teardrop to be the most aerodynamic shapethe teardrop or raindrop is indeed the most aerodynamic shape at subsonic speeds.At supersonic speeds the so called "Sears-Haack body" has better aerodynamics.
A teardrop is the most aerodynamically effective shape for a rocket travelling through the atmosphere. From an engineering standpoint, a cylindrical shape accommodates compressed gas cylinders (fuel and oxygen) most efficiently. For a rocket operating outside the atmosphere, shape is irrelevant because it will not encounter drag no matter how un-aerodynamic the shape.
What defines a shape as being aerodynamic is that is has as little resistance as possible at the front of the shape (whichever direction is moving forward) and also allows the air to rejoin after the shape with as little turbulence as possible. So the most aerodynamic shape would be a needle that is pointed at both ends. However this shape is not really useful in most applications, but the idea of this pointed at both ends shape can be seen in many of the newer cars. Look at a prius for example, the front is pointy and the back is designed as a point but is cutoff prematurely.
Sails on boats, wings on birds and aircraft, blades on wind turbines Hi Updated answer, The most aerodynamic shape for cars is the teardrop shape, you will find that most modern cars go into a wind tunnel, and turbulence on the body is checked. For example the wing mirrors are shaped to reduce drag. A sail on a boat is probably the totally opposite effect as it is designed to catch as much air as possible. An aerodynamic shape will not let the wind effect it. The wind slips over it, with nowhere to catch to slow it down.
Well, the most aerodynamic shape is a teardrop/raindrop shape. You would think a spherical car (assuming you means completely spherical) would be very aerodynamic. But that is false. The exit of the wind passing over/under/around your car is as important as when the wind hits it initially. So a spherical rear end would be much worse that a tapered rear end.
While each seed can vary, most apple seeds are in the shape of a teardrop.
Sort of a teardrop shape.
A teardrop shape?
a teardrop shape
The shape of the aircraft makes it aerodynamic.
aerodynamic |ˌe(ə)rōdīˈnamik|adjectiveof or relating to aerodynamics : aerodynamic forces.• of or having a shape that reduces the drag from air moving past : the plane has a more aerodynamic shape.
teardrop.