Calculating Minimum Turn Radius for 200 m/s Jet

In summary, the formula for calculating the minimum turn radius for a jet traveling at 200 m/s is R = V^2 / g * tan(θ). The bank angle for the jet can be determined using the formula θ = tan^-1(g * R / V^2). Air density can affect the minimum turn radius, with a higher density allowing for a tighter turn. There is a maximum bank angle for calculating the minimum turn radius, typically limited by the aircraft's capabilities and safety considerations. Other factors that can affect the minimum turn radius include the weight and center of gravity of the aircraft, wind conditions, and external forces. Adjustments to the calculated minimum turn radius may be necessary based on these factors.
  • #1
Haftred
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A review question for the test our teacher is going to give us is:

A 21,000 kg jet makes a 40 deg banked turn w/o losing altitude. Assume the life vector is perpendicular to the plane of the wings. What is the minimum radius turn it can execute at a speed of 200. m/s?

Any help appreciated.
 
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  • #2
Analyze the forces acting on the jet. Since it's turning, it is centripetally accelerated. (Consider the horizontal and vertical components of the forces.)
 
  • #3


To calculate the minimum turn radius for a 200 m/s jet making a 40 degree banked turn without losing altitude, we can use the formula R = V^2 / (g*tanθ), where R is the minimum turn radius, V is the velocity, g is the acceleration due to gravity, and θ is the bank angle.

Plugging in the given values, we get R = (200 m/s)^2 / (9.8 m/s^2 * tan 40°) = 8,165 meters. This means that the jet can execute a minimum turn radius of 8,165 meters at a speed of 200 m/s and a bank angle of 40 degrees without losing altitude, assuming the lift vector is perpendicular to the plane of the wings.

This calculation is important for pilots to understand as it helps them determine the limits of their aircraft's maneuverability and allows them to make precise turns while maintaining altitude. I hope this helps with your review question and good luck on your test!
 

1. What is the formula for calculating minimum turn radius for a jet traveling at 200 m/s?

The formula for calculating minimum turn radius is R = V2 / g * tan(θ), where R is the radius, V is the velocity, g is the acceleration due to gravity, and θ is the bank angle.

2. How do you determine the bank angle for a jet traveling at 200 m/s?

The bank angle can be determined by using the formula θ = tan-1(g * R / V2), where R is the radius, V is the velocity, and g is the acceleration due to gravity.

3. Can the minimum turn radius be affected by air density?

Yes, the minimum turn radius can be affected by air density. As air density increases, the lift generated by the aircraft also increases, allowing it to make a tighter turn at a given velocity and bank angle. On the other hand, a decrease in air density would result in a larger minimum turn radius.

4. Is there a maximum bank angle that can be used to calculate the minimum turn radius?

Yes, there is a maximum bank angle that can be used to calculate the minimum turn radius. This is typically limited by the aircraft's structural and aerodynamic capabilities, as well as pilot comfort and safety. A commonly used maximum bank angle for commercial jets is around 30 degrees.

5. Are there any other factors that can affect the minimum turn radius for a jet?

Yes, there are other factors that can affect the minimum turn radius for a jet. These include the weight and center of gravity of the aircraft, wind conditions, and any external forces acting on the aircraft. These factors can vary from flight to flight and may require adjustments to the calculated minimum turn radius.

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