Is there an existing term for the center of mass of the gas in a cylinder, not the metal of the cylinder itself?“Center of air?” “Center of gas”?
Why make up terms?
Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.
Benefits of registering include
Is there an existing term for the center of mass of the gas in a cylinder, not the metal of the cylinder itself?“Center of air?” “Center of gas”?
Why make up terms?
Is there an existing term for the center of mass of the gas in a cylinder, not the metal of the cylinder itself?
I think it should read:Would anyone disagree?
- The diver should have just enough weight to be neutrally buoyant with empty tanks and an empty wing.
so let me get this straight. Diver whips out their DSMB, finning to compensate for the additional lift of their DSMB when inflated. Once they release, then they add enough gas to be neutral?!?Also if the diver is going to deploy and smb from depth. They need additional lead to keep the end of the smb submerged and the remainder vertical.
That's a good point, especially for thick wetsuits.The center of mass is usually understood to be the that of the entire system. The article wants to position the wing to align with the center of mass of the gas alone. You might wish to emphasize that.
You're also neglecting discussion of buoyancy loss due to wetsuit compression and that the wing needs to compensate for that as well. If you align the wing to the gas mass, it may not be aligned with the wetsuit center of buoyancy loss. Since this loss can be much larger than the gas weight, it may be beneficial to shift the wing away from the gas center of mass in such cases.