Fluid flow and momentum equation. Do I have the right equation?

[defdek]

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F1x+F3x = density x Q(Vx2 – Vx1)
F1x = -Rx
F3x= (pressure 1 x area 1) + (Pressure 2 x area 2) (Cos B)
F1y+F3y = density x Q(Vy2 – Vy1)
F1y = -Ry
F3y = (Pressure 2 + Area 2)(Cos B)
So is it:
Rx= (pressure 1 x area 1) + (Pressure 2 x area 2) (Cos B) - density x Q(Vx2 – Vx1)
Ry = (Pressure 2 + Area 2)(Cos B) - density x Q(Vy2 – Vy1)

 

[boneh3ad]

You mind defining all your variables just so that we don't make any assumptions about what you mean?

 

[defdek]

It is same as this one:
http://www.engineeringtoolbox.com/forces-pipe-bends-d_968.html

but i just change the bend direction