- #1

masterchiefo

- 212

- 2

## Homework Statement

The landing gear of an aircraft is composed of a main leg OA (with a weight including the wheel is

1000N to G) and two secondary links BC and 50cm long each CD. The DC link forms an angle

θ of 30 degrees with the vertical.

a) Add the rotational equilibrium equation with respect to fulcrum A of

forces acting (only) on the leg OA and determine the force

exerted by the DC link D.

Pic in attachment.

## Homework Equations

## The Attempt at a Solution

sin(x)=40/80 = 30 degree

Total forces X : DC *cos(30) - w*sin(30) = 0

Total forces in Y: DA+DC*sin(30)-w*cos(30)=0

Moment of force(total) = 0.80m*DC*cos(30)+0-w*sin(30) = 0

I have a problem with my Moment of force equation, I am missing something or something is wrong because my calculator gives me an error "FALSE".

Took a good 2 hours to try to figure out by my own but I did not find my error.

Thank you for helping.