Why Does My Power Required Curve Lack a Reverse Command Region?

In summary, a power required curve problem involves determining the minimum power necessary for a machine to overcome resistance. It is calculated by plotting power output against resistance and fitting a curve to the data. Real-world applications include determining car speed, plane takeoff energy, and wind turbine power. In engineering, it helps optimize machine performance. Factors such as temperature, altitude, and material properties can affect the curve.
  • #1
subsonic
1
0
Can someone help me. Why does my power required curve doesn't have the region of reverse command? It goes up from vmin to 230mph. It never goes down. Thats not normal for the power required curve.

Attached is the region of reverse command that a power required curve should possess.

Details:
Propeller fixed pitch
engine 107hp @ 3300rpm
clmax= 1.35



what should i do? Is there a possibility to have a power required curve
without region of reverse command.
 

Attachments

  • regions of command.jpg
    regions of command.jpg
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  • #2
If it's got a fixed pitch prop how does it manage to provide reverse thrust?
 

FAQ: Why Does My Power Required Curve Lack a Reverse Command Region?

What is a power required curve problem?

A power required curve problem is a mathematical model that describes the relationship between the power output of a machine and the resistance it must overcome. It is commonly used in engineering and physics to determine the minimum power necessary for a machine to perform a certain task.

How is a power required curve calculated?

A power required curve is typically calculated by plotting the power output of a machine against the resistance it must overcome, and then fitting a curve to the data. This curve is usually a polynomial or exponential function that accurately represents the relationship between power and resistance.

What are some real-world applications of a power required curve?

A power required curve can be applied to a variety of real-world scenarios, such as determining the power required for a car to reach a certain speed, calculating the energy needed for a plane to take off, or estimating the minimum power necessary for a wind turbine to generate electricity.

How is a power required curve useful in engineering?

A power required curve is useful in engineering because it allows engineers to understand the power requirements of a machine and design it accordingly. By analyzing the curve, engineers can optimize the performance of a machine and ensure that it has enough power to perform its intended function.

What are some factors that can affect a power required curve?

Some factors that can affect a power required curve include changes in temperature, changes in altitude, and changes in the properties of the materials being used. Any external forces or conditions that affect the resistance or power output of a machine can also impact the shape and accuracy of the power required curve.

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