If I download the table as PDF, it says that the X7-80 weighs 29.9lbs, which is 13.6 kgs. Take a moment to grasp this basic concept. IdealCapacity (L) WaterVolume (L) × WorkingPressure (bar) ÷ AtmosphericPressure (1. Understanding this simple ‘ gas law ‘ is key to staying safe when scuba diving. For the purpose of scuba diving the main gas that varies is air and nitrogen. The imperial table says that it weighs 27.7lbs, which is 12.6 kgs. Boyle’s Law in scuba diving explains how the volume of gas varies with the surrounding water pressure. ![]() The metric table says that the X7-80 weighs 13.1 kg, which is 28.9 lbs. Post added April 19th, 2012 at 09:53 AM -īy the way, there's something fishy with XSScuba's tables. Scuba tanks, often called cylinders or bottles, are high-pressure vessels that store the breathing gas usually air for divers. So, in other words, if I start with a 550 cubic inch tank at 4500 psi, and use it to refill a 13 cubic inch 3000 psi tank every time it gets down to 2000 psi, then I believe the answer is 42 refills. Since I don't really know anything about how an HP80 is defined, would you say that the XSScuba X7-80 is a standard HP80 tank? (Considering it holds 81 cuft instead of 80 etc) This means that the full equation can be simplified and the 1/3 in numer and denom actually cancel out, (550 ci/3) / (13 ci/3) 550 ci/13 ci 42. The air in a full tank weighs 0.07647 x 81 cuft = 6.1940 lbsĪn empty tank has a buoyancy of 25.7536 lbs - 27.7 lbs = -1.94 lbs (XSScuba table: -3 lbs)Ī full tank has a buoyancy of 25.7536 lbs - 27.7 lbs - 6.1940 lbs = -8.14 lbs (XSScuba table: -9 lbs) The density of salt water is 64 lbs/cuft, giving 0.4024 x 64 = 25.7536 lbsĪir has a density of 0.07647 lbs/cuft. The tanks hold breathable air under immense pressure and make it possible for us to breathe underwater. ![]() The internal volume of the tank is 81 cuft / 3442 psi x 14.6959 = 0.3458 cuft The scuba tank or diving cylinder is a central piece of equipment for every diver. The objects weight, volume, and water depth are required. It still differs from XSScuba's own buoyancy values, I guess it's because I don't account for valves and manifolds (which would add about 2 lbs to the tank weight):ġ atmosphere is 14.6959 psi. This calculator determines the lift bag capacity and air volume required to recover an underwater object from fresh or salt water. Regardless, here's the calculation for a XSScuba X7-80 tank (81 cuft, 3442 psi, 27.7lbs). The XS Scuba HP tank values are slightly different from the "default" HP80 tank (80 cuft, 3442 psi, 32.6lbs) in the calculator.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |