Neutral Bouyancy equation and Neutral buoyancy w/ thrust
Posted: Nov 8th, 2013, 5:03 pm
So here's my question: If I make my ROV neutrally bouyant, will a vertical thruster, regardless of power, make the ROV go up and down? From a physics standpoint, I believe this will work, but I might be missing a factor. I would assume theoretically it would be like a force being applied to a stationary object, where the only other force acting upon this object is friction, no gravity.
Also the equations needed to achieve neutral buoyancy, gravity and buoyancy, are:
Fg = (p)(V)(g), where p is density of object,V is Volume, and g is the force(acceleration) of gravity.
Fb = (Vs)(Pl)(g), where Vs is volume of solid, Pl is density of liquid(or gas), and g is the force of gravity.
In my design, my frame(PVC pipe) allows water in, so:
should Volume in both equations be equal to the volume of the walls of the pipe AND the inside filled with water, or just the walls (actual solid part of pipe)?
And:
When calculating density of the object for force of buoyancy, would this include the weight of the water inside, or just the weight of the pipe walls(weight of pipe in air).
I am assuming the answer to both of these is that the volume and weight should be measured with that of the water that will be inside the frame.
Also the equations needed to achieve neutral buoyancy, gravity and buoyancy, are:
Fg = (p)(V)(g), where p is density of object,V is Volume, and g is the force(acceleration) of gravity.
Fb = (Vs)(Pl)(g), where Vs is volume of solid, Pl is density of liquid(or gas), and g is the force of gravity.
In my design, my frame(PVC pipe) allows water in, so:
should Volume in both equations be equal to the volume of the walls of the pipe AND the inside filled with water, or just the walls (actual solid part of pipe)?
And:
When calculating density of the object for force of buoyancy, would this include the weight of the water inside, or just the weight of the pipe walls(weight of pipe in air).
I am assuming the answer to both of these is that the volume and weight should be measured with that of the water that will be inside the frame.