The plane flies straight and evenly at a speed of 720 km / h. Find the thrust force of the motors
| August 7, 2021 | education
The plane flies straight and evenly at a speed of 720 km / h. Find the thrust force of the motors, if the motor power is 1800 kW, and the efficiency is 70%?
To calculate the required thrust force of the motors of a given aircraft, we apply the formula: η = Np / Nm = F * V / Nm, whence F = Nm * η / V.
Values of variables: Nm – motor power (Nm = 1800 kW = 1.8 * 10 ^ 6 W); η – efficiency of motors (η = 70% = 0.7); V – aircraft speed (V = 720 km / h; in SI V = 200 m / s).
Let’s perform the calculation: F = Nm * η / V = 1.8 * 106 * 0.7 / 200 = 6.3 * 10 ^ 3 H = 6.3 kN.
Answer: The motors of a given aircraft have a thrust force of 6.3 kN.
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