This section includes questions related to the subject of aerodynamics, or the study of forces created by the motion of air against an object. Among the topics adressed here are the basic forces of lift and drag, principles of wing design, and the methods used to estimate aerodynamic behavior.
I have a further question regarding the earlier answer on the lift formula. You use the same equation for an airplane and a helicopter, but what if the helicopter is in hover? The velocity in hover is zero, so the lift must also be zero according to this equation.
Is there a way to estimate the drag coefficient using Thin Airfoil Theory? I know that lift coefficient is estimated as 2*pi*alpha, but does Thin Airfoil Theory even predict a value for the drag coefficient?
I have been trying to prove that the equation for lift is accurate. What is the lift coefficient for a Boeing 747? How do you calculate the lift coefficient of an aircraft given values for the other variables? I have tried to work it out but all I have is bad luck.
I found equations for lift and drag for a 2D airfoil as a function of normal force, axial force, and angle of attack. ... I assumed some values, but the results seem totally wrong. ... Have I made a glaring omission or is there a physical explanation for this behavior?
Why do we use Mach number as a reference for speed, and not just simply knots, kph or mph etc.? I know the drag increases around Mach 1, giving the impression once upon a time that there was a barrier there. Is that the only reason?
I am a 7th grader and have decided to do my science fair project about aerodynamics in planes. I have searched the internet but have not found very much information. I was wondering if you can help me.
I am involved in wind tunnel experiments working with different shapes. I'd like to know the drag coefficient for a cylinder and a cone with its point facing into the wind. Are there any simple approximations?
I read that airplanes with a wing of high aspect ratio can still fly at high angles of attack and a wing of a small aspect ration usually stalls at about 16° AoA. If this is true, then why can the F-14 land on a carrier at high AoA with its wings fully extended? Doesn't fully extending the wings make a small aspect ratio?
Can a pilot hear anything inside the cockpit when breaking the sound barrier? If traveling faster than the speed of sound, will you hear yourself scream? Can you hear a person sitting next to you or at the opposite end of the plane? ...
What is purpose of the wing pods on the Airbus A340? What was the purpose of the large fairings or pods on the wing of the Convair 990? The early jetliners had clean wings, so why are flap track fairings now the norm?
I remember several years ago I...heard about a plane the Russians developed and tested that used the ground effect. I've heard that Boeing is making a huge airplane, the Pelican, that will use "the WIG effect." Do you know anything about these planes?
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