Question

Due to your knowledge of physics and interest in aviation, you have got a summer job at the Boeing Company. They have commissioned you in the design of the propeller of your new plane. The engine must be designed in such a way that it produces a torque of 100 mN. Determine the length L and the mass M of the propeller (fix the L and find the mass), so that at startup the time it takes for the propeller to blow at 300 rpm is 3 seconds.

Resuelva la siguiente situacion: Debido a tus conocimientos de fisica va verano en la Compañía Boeing. Ellos El motor debe diseñarse de tal forma que la longitud L y la masa M de la hélice (fie conocimientos de fisica y al interés por la aviación, has conseguido un trabajo de Compañía Boeing. Ellos te han encargado en el diseño de la hélice de su nuevo avión. be diseñarse de tal forma que produzca un momento de torsión de 100 mN. Determine v la masa M de la hélice (fije la L y halle la masa), de tal forma que en el arranque ve tarde a la hélice en llagar a 300 rpm sea de 3 segundos. El torque desde el motor hace girar la helice Eje

Due to your knowledge of physics and interest in aviation, you have got a summer job at the Boeing Company. They have commissioned you in the design of the propeller of your new plane. The engine must be designed in such a way that it produces a torque of 100 mN. Determine the length L and the mass M of the propeller (fix the L and find the mass), so that at startup the time it takes for the propeller to blow at 300 rpm is 3 seconds.

Answer 1

Remember that: T= la The angular acceleration can be calculated using the kinematic equation: w = wo + at Since: Wo = 0 Then: 1 12 Where: w = 300 rpm = 300 (25) = 10 17pad The angular acceleration: a = 107 rad The moment of inertia I= ML Then: I= 15ML a Using the giving data: 100 = + MŁ (101) Then: ML = 115 If L = 2 m Then: M = 28.75 kg