- #1

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plz tell me what else is required for the calculations & also what type of motors to use

plzzzzzzzzzz helpppppppppppppp

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- Thread starter ank_gl
- Start date

- #1

- 738

- 0

plz tell me what else is required for the calculations & also what type of motors to use

plzzzzzzzzzz helpppppppppppppp

- #2

FredGarvin

Science Advisor

- 5,067

- 10

It's policy to not just spoon feed you answers to questions. You have to do some work. So let's start with...have you drawn a free body diagram?

- #3

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i have attached the free body diagram..........

airflow produces lift on the elevator...we get anticlockwise moment about the aerodynamic center and nose pitces down....all i want to know is how do i calculate the torque which is experienced at the hinge point coz i dont know which area to take in formula

FL=1/2*ρ*V2*CL*Area

and at what point does this force acts?????????

also doesn't the aerodynamic centre change when the plane pitches up or down...... as far as i know, it should & then how should i take it into account????????

sorry for asking such silly questions

also plzzzzzzzzz dont yell at me.....i dont have anyone to help me

airflow produces lift on the elevator...we get anticlockwise moment about the aerodynamic center and nose pitces down....all i want to know is how do i calculate the torque which is experienced at the hinge point coz i dont know which area to take in formula

FL=1/2*ρ*V2*CL*Area

and at what point does this force acts?????????

also doesn't the aerodynamic centre change when the plane pitches up or down...... as far as i know, it should & then how should i take it into account????????

sorry for asking such silly questions

also plzzzzzzzzz dont yell at me.....i dont have anyone to help me

- #4

FredGarvin

Science Advisor

- 5,067

- 10

[tex]F=\frac{1}{2}\rho A V^2[/tex]

Since the plate is perpendicular to the flow, the center of pressure should be at the geometric center of the elevator. That will allow you to calculate the maximum torque that the aero forces are applying to the elevator and thus the max torque your servo/linkage system must provide to move it.

- #5

- 738

- 0

thanks man.........

i almost cant beleive that i m so stupid

i almost cant beleive that i m so stupid

- #6

FredGarvin

Science Advisor

- 5,067

- 10

Good luck.

- #7

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thanx for the advice sir

- #8

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