Recent content by morfzcspls

Is this what you guys do? We all know that the energy required to fill the balloon is equal to or greater (due to efficiency) than the buoyancy that is produced. I know my presentation was badly done but the question seems straight forward enough, but the only thing that I have received so far...

Anyway, I have some things to think about from you guys so I’m going to start hacking away at my concept.Thanks

Again sorry for not being clear, since I have been kicking this around for awhile now it is all so obvious in my head. The tank has sufficient room at the top for expansion without overflow and it has a large enough diameter so that the balloon will never touch the sides.

Thanks for the help Bystander, I have gained some good information to work with from all you guys.

Since the accordion fold side presents surfaces to the ambient pressure it seems that it needs to be considered. If so the number of folds becomes important and how they are allowed to unfold could also be important if there were many folds.

Are you saying, assuming that the chamber and the balloon start out fully collapsed, that no amount of air pushed into the balloon will move the top plate?This may seem simple to you but I am having a hard time understanding it.

Sorry, I should have added that the tank is not submerged in my last response.

The bottom of the chamber is attached to the bottom of the tank and the chamber is sealed against the contents of the tank but open to atmosphere through the bottom of the tank. So are you saying that the top plate will move down? Also since the accordion fold side offer a surface to the...

Sorry Chestermiller, This has nothing to do with homework I assure you, and I apologize for my Inability to succinctly state the question but it was my intention to do so. I attempting to create a discussion about how the accordion fold sides effect the force required to lift the top plate...

Thanks Bandersnatch, Due to the poorly described situation that I presented I need all the help I can get.

Sorry for the confusion montoyas7940, The tank diameter is not defined and the tank is open at the top. The chamber consists of a 3 ft dia top and bottom plate (crosshatched in the sketch). Are you saying that there is no amount of air (assuming the tank can't overflow) that will lift the top...

The chamber and the balloon are 15 ft below the surface of the tank, and the question is asked when the tank is already full. The pressure at 15 ft is approximately 6.48 PSI

Hi berkeman,The drawing is derived from a concept that I am working on and the mechanical setup by itself has no purpose. It is just a creation that allows me to clearly ask the question. What I am trying to understand is how the folds in the sidewall change the amount of force required to...

I would like to show the details of the situation before asking the specific question so: Conditions:The attached sketch shows a situation that is slightly after the start, since the balloon is shown with air already inside. The question that I will ask is about a situation where the balloon...

Sorry for the problem with the picture I attached previously. I’m having an issue with the latest update of DraftSight not exporting DWG files. Several of the formerly possible file types (.png, .tif, .wmf, .emf) create the file but they are not visible. So it seems the attached JPEG is...