Trim Issues with Rapid Diver BC? Rapid Diver BC w/ BP?

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harmeyes

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I have been looking through all the info that I can find for the Zeagle Rapid Diver system. This is not because the overall system is of interest to me, but because the BC portion of the system interests to me. I like the option of attaching the BC directly to a backplate. This could make for a very stable and versatile system. I would like to know how this set-up affects a divers trim. Please provide any guidance you can regarding the system and/or the BC's (BC use with a backplate and a regular tank) use and the diver's trim. Does the BC tend to force a diver face up at depth? Does it make maintaining a horizontal position difficult at depth?

I am a recreational diver who wears little lead (6# in saltwater with a 3mm suit, and 10-12# in freshwater with a full 7mm suit) and dives primarily with a single Aluminum 80. I have good trim and buoyancy control (not quite like the DIR guys, but I get comments from fellow divers), and I am comfortable in the water. I have difficulty getting a good fit from a jacket style BC.

I am thinking about going to a BP/W set-up. I have dove a Dive Rite Trans-pac twice, once in the pool, and once in open water. At the surface, I felt that the wing was pushing my face forward into the water. It is merely a distraction when I am fully aware and able, but what happens in an emergency, or if I'm panicked, or if I'm unconcious. I understand that the pushing forward sensation could improve with a trim weight on the tank or something like that, but I like to be able to float face-up at the surface. So, I am considering ditching the wing part of a BP/W and installing a Rapid Diver BC on a backplate. The BC is very low lift (let's not start an arguement over lift requirements now, please), which will contribute to improved streamlining. It allows for an easy face-up position at the surface due to the location of the aircell, and with a backplate, this could be a fully customizable system.

And...if you don't want to comment on any of that, you could recommend a very streamlined single-tank wing. Right now, I think the OMS single tank BC w/ 32# of lift looks good.

I appreciate your comments.
 
I have difficulty getting a good fit from a jacket, because I have a tall, narrow build a 6 feet tall, 160 lbs.
 
I've got the same problem as you too. 6' 2" 164 lbs. I haven't found a jecket BC that fits me yet. That's why I am going to go with a BP/W. Sorry I couldn't help you with the Rapid Diver. But as far as the wing pushing your head forward, all you have to do is lay back on it.
 
As far as how well the backplate and rapid diver bc work together, you might want to contact Zeagle. They were very helpful to me when I had a regulator question.

As far as being pushed forward with your bp/w, have you considered some trim weights on the lower tank band? What about only partially inflating your wing. As for me, I lean back and then inflate my wing so that I foat on my back like I'm on a raft in the pool.
 
I have a much easier time floating on my back w/ my bp/w than I ever did in a jacket (disclaimer: the jacket I rented for my classes wasn't the ideal shape for me). I have the Apeks WTX system and I believe the wing is Apeks as well (it is their small one).
 
I appreciate the input on staying face up with a bp/w set-up. However, one thing that concerns me is that one wicked day when my life may be on the line due to loss of conciousness in the water. In that situation, I wouldn't be able to lean back and then inflate the wing, and I doubt that any would-be rescuer would be able to do that for me either.
 
I have to be honest, I personally have heard this story about "if you're unconcious on the surface" a million times, yet I have never once heard of the situation of someone actually being saved by having a jacket style BC keep their unconcious head out of the water. Anybody? I'm not denying it could happen, but it seems like such an unlikely situation.

The transpac trim is a little different than a SS plate. Remember, with a plate, much of the weight is behind you, sandwiched between your lungs and the wing. I have no problem being pitched forward with my BP/W set up, but its a tiny wing and I rarely have it fully inflated. Given your posted weighting you'd almost certainly be neutral in salt water with your 3mil; me too almost (1-2lb in a pocket) and for me it's a huge improvement. Check out the deep sea supply single tank rig; it looks about the most streamlined out there. Many others will probably post on this thread about the head forward on the surface bit.
 
Would anyone like to provide a couple of links to either threads on this board or articles that analyze an accident that involved or whose outcome was affected by diver postion at the surface.
 

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