You don’t think it was to do both - assist and deflect?It’s purpose was to help control free flow.
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You don’t think it was to do both - assist and deflect?It’s purpose was to help control free flow.
YesYou don’t think it was to do both - assist and deflect?
I have found the feature more useful in the assist than in VFF control but it does help.Control is the operative word.
Sales gimmick or not, I think the adjustable vane is a useful feature. It does exactly as it is advertised.
I think it's worth pointing out for other readers that the Dive/PreDive vane must control freeflow. That is its primary function. When the case is designed to facilitate breathing (i.e., with a Venturi effect that reduces inhalation effort to near-zero under a workload - green curve above), you need a way to control that for beach entries or at significant depth where air density further increases Venturi effects.I have found the feature more useful in the assist than in VFF control but it does help.
I think it's worth pointing out for other readers that the Dive/PreDive vane must control freeflow. That is its primary function.
Do you guys actually dive these regs? This discussion is reminiscent of some of the early theoretical math work I did. I assume there is a practical component somewhere?
@buddhasummer Perhaps getting them wet may be revealing?
Fair enough, @couv. The two functions (adding Venturi and preventing freeflow) go hand in hand. If you pulled the vane, that "airflow focusing" function would disappear, and the reg might or might not freeflow (like a 156 case).By control, do you mean prevent?...Are you sure about that? If one were to remove the flow vane, would the second stage VIVA freeflow?