RXTdiver
Registered
From the PADI Online course there are these parts:
1. "Steel cylinders usually hold the same amount of air as aluminum cylinders, but with a smaller size and/or lower pressure"
2. How much air your cylinder holds depends on its internal capacity and its rated working (maximum) pressure. One cylinder can have a
higher working pressure than another, but hold less air because the internal capacity is lower.
This implies that the amount of air and the capacity are two different things. I thought that the amount of air a cylinder could hold is
the capacity.
3. Some websites say the amount of air is calculated by pressure x capacity. Others say pressure x size = capacity. The chart below
implies that size and capacity are two different things. These terms seem to be used interchangeably. This has me confused.
a. How is size defined?
b. How is capacity defined?
c. What is the overall equation used to calculate the amount of air in your cylinder? Is it pressure x size or pressure x capacity?
There is a lot going on here. Too many things to keep track of, so if you can answer point by point, that would be very helpful.
1. "Steel cylinders usually hold the same amount of air as aluminum cylinders, but with a smaller size and/or lower pressure"
If a steel cylinder is smaller and is holding the same amount of air (capacity right?), wouldn't the pressure have to be higher instead of lower?
2. How much air your cylinder holds depends on its internal capacity and its rated working (maximum) pressure. One cylinder can have a
higher working pressure than another, but hold less air because the internal capacity is lower.
This implies that the amount of air and the capacity are two different things. I thought that the amount of air a cylinder could hold is
the capacity.
3. Some websites say the amount of air is calculated by pressure x capacity. Others say pressure x size = capacity. The chart below
implies that size and capacity are two different things. These terms seem to be used interchangeably. This has me confused.
a. How is size defined?
b. How is capacity defined?
c. What is the overall equation used to calculate the amount of air in your cylinder? Is it pressure x size or pressure x capacity?
There is a lot going on here. Too many things to keep track of, so if you can answer point by point, that would be very helpful.