halemanō;5735073:
Nice use of the "
evil twin" BS to cloak your
anecdotal opinion that "with minimum weight to perform an effortless hover during the 10 or 20 ft stop" - the
implied good twin using the wing would be "
much faster" than the
negatively labeled vest user.
The problem with an argument like this is there is no supporting data; just the "feelings" of each individual user. Even when two not visibly much different divers try the same two different BC's; one of the divers may very well feel "faster" in one BC while the other diver feels "faster" in the other BC, even though neither of them was actually "faster."
"No supporting data..." Nothing like coming out of the box with the pretense of science and one of it's common mis-uses. As science in the year 2011 has become much more of a "who is paying, and what are we expected tp prove..or disprove", trying to sound scientific in your approach won't get you too far.
If there was any "supporting data", it would have been "paid for" by a mass market diving industry manufacturer, and it would use science to "prove" the junk the mass marketer is selling is the better mousetrap. Closer to home, you have the prostitutes responsible for the Gear testing done by Rodales each year, where the worst junk in the dive world, can garner great praise with sufficient ad budgets.
Here is the deal. Most dive shops sell BC's. The dive industry wants them to sell bc's. PADI wants them to sell BC's. You don't really need to know much to sell a vest bc. If you are going to sell a bp/wing, you really need to know how to dive it, and how to configure it for the potential buyer--this destroys a huge piece of the potential distribution for bp/wings.
Then, you have all all the guys who dive vest style BC's, and any suggestion that they may not be diving the best gear leaves them feeling insulted, and upset. I'm thinking you may fall into this category, Halemano, but hopefully I will be proven wrong on this intuition.
The next thing is the area people dive in and the level of challenge potential and adventure.
The Keys ( which you dived for a time) are not challenging, they have essentially no currents, as is obviated with the normal practice of anchoring ( you can't anchor if there is a real current). I don't know squat about Hawaii...I get an impression you have alot of cruise ship quality dive tourists diving there ( the worst skills in the universe of diving), and guys like your self have a full time job trying to prevent hopelessly undertrained and underskilled pretenda-divers from getting into trouble.....Clearly this would be a poor market for bp/wings.
halemanō;5735073:
Then there is that "mythical" perfect trim BS.
Different divers have different buoyancy characteristics and different dimensional characteristics. Bird bones, stork legs, thunder thighs, bubble butt, hour glass waist, beer gut, barrel chest, bodacious tata's, gorilla guns, orangutan arms, no neck and bone head are just a few possible differences.
With a bp/wing, weighting is distributed to allow any of these body types to achieve optimal trim. Come to Palm Beach, and Errol and I will put you in one, optimize weighting, Errol can give you the 15 minute Fundies program for wonder divers

, and we will watch you change your tune as you see how much this improves trim and propulsive efficiency over the vest alternative
halemanō;5735073:
Not to mention that different divers and different types of diving might have different definitions of perfect trim. I prefer the face lowest, waist slightly higher than face, knees slightly higher than waist; others seem to prefer exactly and completely horizontal.
The bp/wing with proper weighting will do any of these perfectly.
halemanō;5735073:
Is it not possible that for some divers a specific vest BC gives them the trim they want and the speed they need?
Optimal trim is totally possible for many divers using a vest bc. Most will be slower, due to more drag inherent in the less streamlined form of the vest.