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

[defdek]

http://img89.imageshack.us/img89/3914/unled23g.png 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) - PQ(Vy2 – Vy1)

 

[LawrenceC]

For starters, I see that in two cases you are adding area to pressure. This cannot be done because units are different. You should label your diagram as to what is F and what is R.

 

[defdek]

F is a force and R is a resultant force.

http://www.engineeringtoolbox.com/forces-pipe-bends-d_968.html

Im using this information but I change its direction