Quote: (Originally Posted by
Woz)
Silly question: why not have the exhale hose running concentrically down the inside of the inhale hose. Then it will look like a pendulum Rebreather but is actually a loop. In fact you could do this for any RB. You do it concentrically because the larger dia hose doesn't have to be that much bigger than the smaller hose as the CSA increases as a squared relationship.
Nice idea, but it could be tricky to get the oneway valves by the DSV to work. Like a normal one for the inner hose and something like a washer or flat torus shaped thing for the outer one. Also the inner one could maybe even be almost the same size as the outer one but made entierly collapsible, like a irrigation hose. Possibly with some small wire inside to prevent it from sticking.