The two forces acting on an aircraft in flight are lift (acting upwards) and weight (acting downwards). If the lift of the aircraft equals the weight of the aircraft, then the aircraft neither goes up nor down, it is in level flight. If the lift is greater than the weight, then the aircraft climbs (gains altitude). If the weight is greater than the lift, then the aircraft descends (loses altitude) Write a Java program named Flying that calculates whether an aircraft is flying level, climbing or descending. The basic equation to calculate this lift is known as the Flight Equation. The Flight Equation is: L = 1 / 2 * ρ * v2 * s *cl where L = lift (in Newtons), this must equal the weight of the aircraft for the aircraft to fly. To convert kilograms to Newtons multiply kilograms by 9.8 ρ = density of the air, in kg / m3 This value is a maximum of 1.2 at sea level and decreases as altitude (height) increases v = current speed, in metres / second of the aircraft. s = surface area of the wings, in m2 cl = lift co-efficient, a constant value (with no units) that describes how effective the aircraft wing is at generating lift. Your program will prompt (ask) the user to enter all the details for an aircraft, in the order as shown in the examples below, then, using the Flight Equation above, calculate a value for the lift figure. The lift figure must be converted to kilograms, or the weight figure converted to Newtons, either way, so long as they are in the same unit. The weight and the lift are compared. If the weight is the same as the lift ± 250, then the aircraft is flying straight and level. If the weight is greater than lift + 250, then the aircraft is descending (losing altitude) and if the weight is less than lift - 250, then the aircraft is climbing (gaining altitude) Some sample runs of the program are included below (user input is in bold): Example 1 > java Flying Enter air density (p) >> 1.2 Enter velocity (m/s) >> 79.03 Enter wing surface area (m^2) >> 37.16 Enter lift co-efficient >> 1.276 Enter aircraft name >> F/A 18 Hornet Enter aircraft weight >> 18136 The F/A 18 Hornet aircraft is flying level Example 2 > java Flying Enter air density (p) >> 1.2 Enter velocity (m/s) >> 65.26 Enter wing surface area (m^2) >> 37.16 Enter lift co-efficient >> 1.276 Enter aircraft name >> F/A 18 Hornet Enter aircraft weight >> 18136 The F/A 18 Hornet aircraft is descending Example 3 > java Flying Enter air density (p) >> 1.2 Enter velocity (m/s) >> 80.04 Enter wing surface area (m^2) >> 37.16 Enter lift co-efficient >> 1.276 Enter aircraft name >> F/A 18 Hornet Enter aircraft weight >> 18136 The F/A 18 Hornet aircraft is climbing Note: The user input must be in the order shown above and the aircraft name must be able to accept names of more than one word. (Marks will be deducted otherwise).
Max Function
Statistical function is of many categories. One of them is a MAX function. The MAX function returns the largest value from the list of arguments passed to it. MAX function always ignores the empty cells when performing the calculation.
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The two forces acting on an aircraft in flight are lift (acting upwards) and weight (acting
downwards). If the lift of the aircraft equals the weight of the aircraft, then the aircraft
neither goes up nor down, it is in level flight. If the lift is greater than the weight, then the
aircraft climbs (gains altitude). If the weight is greater than the lift, then the aircraft
descends (loses altitude)
Write a Java program named Flying that calculates whether an aircraft is flying level,
climbing or descending.
The basic equation to calculate this lift is known as the Flight Equation.
The Flight Equation is:
L = 1 / 2 * ρ * v2 * s *cl
where
L = lift (in Newtons), this must equal the weight of the aircraft for the aircraft to fly.
To convert kilograms to Newtons multiply kilograms by 9.8
ρ = density of the air, in kg / m3
This value is a maximum of 1.2 at sea level and decreases as altitude (height)
increases
v = current speed, in metres / second of the aircraft.
s = surface area of the wings, in m2
cl = lift co-efficient, a constant value (with no units) that describes how effective the
aircraft wing is at generating lift.
Your program will prompt (ask) the user to enter all the details for an aircraft, in the order as shown in the examples below, then, using the Flight Equation above, calculate a value for the lift figure. The lift figure must be converted to kilograms, or the weight figure converted to Newtons, either way, so long as they are in the same unit. The weight and the lift are compared. If the weight is the same as the lift ± 250, then the aircraft is flying straight and level. If the weight is greater than lift + 250, then the aircraft is descending (losing altitude) and if the weight is less than lift - 250, then the aircraft is climbing (gaining altitude)
Some sample runs of the program are included below (user input is in bold):
Example 1
> java Flying
Enter air density (p) >> 1.2
Enter velocity (m/s) >> 79.03
Enter wing surface area (m^2) >> 37.16
Enter lift co-efficient >> 1.276
Enter aircraft name >> F/A 18 Hornet
Enter aircraft weight >> 18136
The F/A 18 Hornet aircraft is flying level
Example 2
> java Flying
Enter air density (p) >> 1.2
Enter velocity (m/s) >> 65.26
Enter wing surface area (m^2) >> 37.16
Enter lift co-efficient >> 1.276
Enter aircraft name >> F/A 18 Hornet Enter aircraft weight >> 18136
The F/A 18 Hornet aircraft is descending
Example 3
> java Flying
Enter air density (p) >> 1.2
Enter velocity (m/s) >> 80.04
Enter wing surface area (m^2) >> 37.16
Enter lift co-efficient >> 1.276
Enter aircraft name >> F/A 18 Hornet
Enter aircraft weight >> 18136
The F/A 18 Hornet aircraft is climbing
Note: The user input must be in the order shown above and the aircraft name must be able to accept names of more than one word. (Marks will be deducted otherwise).
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