Recent content by ethanesh

Thank you! A follow-up question if you don't mind: if I avoid a rigid connection, will the force on the drone caused by the tension in the hose be equal to the combination of the forces acting on the hose? For example, if the two forces on the hose are 5 lb caused by gravity in the -y direction...

I do not think I understand what you're saying here. You say no moment is transferred from the load, but then talk about the pitch caused by the load, which is a moment. Is there some terminology difference I am not comprehending?

Yes, the hose has to be offset slightly towards the back of the drone. So if I want to find the moment, I need to find the tension in the hose and use that for the force the drone experiences (outside of aerodynamic drag/thrust)... yes? That leaves me with another question. Say I have a setup...

Wouldn't the weight of the hose cause a moment that could rotate/flip the drone, since it isn't acting through the drone's CG? If I attached some heavy cargo like this that would surely cause to drone to rotate. Is the hose situation different? Am I misunderstanding what you're trying to say...

I am not sure I understand, I want to know the moments so that I can avoid potentially flipping the drone.

OK! To make sure I understand what you're saying: if I want to get a realistic model of the moments acting on the drone, I should consider the system as the drone + the raised section of the hose, with the drone as the axis of torque. My assessment of the moment caused by the friction is...

Well, today I learned that that exists. Thank you!

The total hose length is 150 feet. Yes, I was assuming equilibrium motion, sum of forces = 0. I do realize that the hose would sag slightly rather than form a straight line. I assume the angle at the ground end would approach horizontal. I was approximating it as a straight line because I...

This is not technically a homework question, but it seems trivial enough that it probably belongs in this forum (and last time I posted something similar it got moved here, apologies if I have now reversed the problem and posted in the wrong forum again.) I am trying to find the forces and...

Thank you! I think my mistake might have been looking at the pressure as the effect that causes the damage, while I think you're saying it is the force (at least for the case of wind load.) Just to be clear; are you saying a wind loading of x pressure is likely to cause more damage in the form...

I will look into that, thank you!

I know it's not a great idea, however, it is the task that my team and I have been assigned by a sponsor, so I have to do my best at it. Right now, I'm just concerned about trying to find the pressure that isn't going to crack the panel (and I'm genuinely interested in the results because it...

Thank you for the response! I understand that water will have a greater impact than air if it is going at the same velocity (due to the principle of momentum) but I thought that the damage caused by a given pressure from wind loading might be comparable to the same pressure caused by sprayed...

TL;DR Summary: Trying to figure out how much water pressure from a pressure washer is allowable on your typical solar panel. Hi, I'm an engineering student and I'm trying to figure out the maximum pressure from the spray of a pressure washer that would be allowable on a solar panel. (I know...