### 1 - Spring force / pressure on electric cylinder

The pressure required for the  electric actuator is calculated by replacing the values ​​requested in the

following formula:

F1 = ( (mx RH) / (2 x N x x2) + 5 ) x 9.81 = Pressure of the electric cylinder expressed in Newtons

• F1 = force / pressure of the electric cylinder
• N = number of electric cylinder required
• m = weight (in Kg) of the tailgate / of the object to be lifted, to be maneuvered
• RH = length (in meters) of the tailgate / of the object to be lifted, to be maneuvered
• x2 = distance (in meters) between the point of application of the electric actuator on the tailgate and the axis of rotation of the tailgate.

Example:

For a tailgate with the following characteristics and values:

• N = 2
• m = 50 kg
• RH = 1.50m
• x2 = 0,40 m

F1 = ( (50 x 1,5) / (2 x 2 x 0,40) + 5 ) x 9.81 = 508N

In this case, the tolerance margin being +/- 50 N, we recommend 2 electric jacks of 550N.

### 2 - Determine the dimensions of the electric cylinder

As a general rule, we recommend respecting the following ratio: stroke 1/3 of the RH side (
90° opening).

`Example: RH = 1.5m 1.5/3 = 0.5m `

-Course 500mm = ST 500+...+V...

-The dimension x2 must be 50mm less than the stroke of the electric cylinder (fig2 and fig4).
-The dimension y1 must be 100mm less than the stroke of the electric cylinder (fig1 and fig3).
Warning: The proposed locations above are examples and in no way commit motionproplus.com. You must consult a design office to validate.