Recent content by Imurphy

Sure, I haven't given too many details. It looks like I'm getting numerical solutions by summing the moments around the axis of rotation. There's just some intellectual property concerns with posting all of my equations online. Thanks Simon, your replies have helped me rethink the problem.

Ok, perhaps there isn't a problem after all. I just can't solve a symbolic solution. If I sum the moments for the simple case with a single fluid, I get 1 equation 1 unknown. I tried solving it symbolically and I get "no explicit solution found", but if I take out all the constants except...

Essentially, that it what happened. I believe the equations become coupled when they became a function of theta. It looks like right now there is 5 unknowns and 4 uncoupled equations, therefore plugging it into a solver or solving by hand didn't work. I think summing the moments should give...

Yes, I have all of those functions written out. Just didn't want to write too much or I thought no one would read it/answer. I was trying to simplify the problem to get to the root of the issue. I've tried solving it by summing the Y forces and X forces against the reaction forces Fx and Fy...

I added the FBD. To clarify, the system is a rigid pendulum with an evenly distributed mass. The fluid is water, so there is also a significant buoyant force (Fb). The weight and buoyant force aren't a function of the angle in this model. In the real system, some of the fluid is water, and...

I'm having trouble solving this problem. I'm trying to find the steady state angle of a rod with wind /fluid drag. Assume Cd, L, U, etc. are known. The viscous and form drag forces are a function of the angle θ so I don't have enough equations to solve the problem. Maybe there's some type of...

Diagram Attached. Hope that helps. I'm looking for Fy,line and Fx,line from Fluid forces, for solving for the Depth of the rig/lure. I'm right now trying to approximate viscous drag and form drag on the line. As you can image, these forces increase as more line is in the water, which...

I am trying to develop a calculator to approximate the depth of a trolling rig used by fisherman, which is typically a lead weight with a hook (jighead), attached to a single plastic/rubber shad body (http://www.tacklecoveshop.com/images/Product/icon/1734.jpg). The other typical rig is a...