What is a normal lift to drag ratio?

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What is a normal lift to drag ratio?

This is especially of interest in the design and operation of high performance sailplanes, which can have glide ratios almost 60 to 1 (60 units of distance forward for each unit of descent) in the best cases, but with 30:1 being considered good performance for general recreational use.

What is the maximum lift to drag ratio?

Maximum L/D Ratio One of the most important performance parameters of an aircraft is its maximum lift-to-drag ratio, LDmax. This ratio indicates not only how far an airplane will glide from a given altitude (see Section 21.3.

Does more lift mean more drag?

Lift-induced drag is the drag that occurs due to the lift generated by a body. As you get more lift, you also create more drag by design. This means you need bigger engines. Bigger engines weigh more, cause more drag, and cost more to run.

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How do you calculate lift to drag ratio?

The lift/drag ratio is used to express the relation between lift and drag and is determined by dividing the lift coefficient by the drag coefficient, CL/CD. A ratio of L/D indicates airfoil efficiency. Aircraft with higher L/D ratios are more efficient than those with lower L/D ratios.

What is Torque in turboprop?

There is another turboprop value — torque — that is also measured and reported to the pilot, and that is really just another way of measuring shp. Torque is the limit of power the airplane can actually use, while temperature and rpm are limits on how much more or less power is available from the engine.

Is lift proportional to drag?

The amount of drag generated by an object depends on the size of the object. Drag is an aerodynamic force and therefore depends on the pressure variation of the air around the body as it moves through the air. Like the other aerodynamic force, lift, the drag is directly proportional to the area of the object.

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What is ITT on a turboprop?

Interstage Turbine Temperature (ITT) is the temperature of the exhaust gases between the high pressure and the low pressure turbines. The gas temperature is measured by a number of thermocouples mounted in the exhaust stream and is presented on a flight deck gauge in either degrees Fahrenheit or degrees Celcius.

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