from BI to BP/W (?)

[Kupu]

dherbman,
Ok, good point. I have noticed a slight tendency to roll when I have all 6 lbs in the tank band pockets.

It seems to me the stability improvement would be greatest if I were to use a steel BP vs AL. I am thinking that using a AL BP I will still need to add about 4 lbs to either a weight belt or trim pockets. Which doesn't seem to be a real improvement over my present setup. Although a steel backplate could help take care of this issue, I travel alot and carrying a 6 lb BP is not something I really want to do.

 

[djanni]

Well that's the pot calling the kettle black. I don't think you even read these threads thoroughly. I'm very sure you assume too much.
I never ask a question.


This is the question I referred to. Your premise that properly trimed diver would choose to change to a different plate and suffer difficuties is what I rejected.

Thread is filled with your examples of divers switching to DSS products and suffering problems:



Pretty easy for the casual reader to get the impression that Lightweight Plates always cause problems.........they don't when properly employed.

Forgive me if I couldn't recognise you were agreeing with me, it's an infrequent event.


Tobin

Tobin, Tobin, Tobin: You are so defensive and so determined to have the last word. So after my comments below the LAST WORD is all yours.

A question??? That wasn't a question it was a rhetorical statement to which YES was the only possible answer.

I still don't think you read these threads thoroughly because if you are your taking things out of context or delibertly twisting them to make your own point.

SS is for stainless steel and has nothing to do with brand recognition. Kydex would probably be associated with DSS so I'll use plastic in the future although all your examples, in total, were taken completely out of context.

Perception of the casual reader... Sometimes I just can't resist trying to keep the casual readers perceptions in balance but what do you think their perceptions are after reading your posts?

Knowing you're a business owner I have to admire the energy you put into selling your products here on Scubaboard. You do provide sound advice sometimes but if someone takes exception to or questions the "WORD-from-Tobin" you can be comtemptious and scornful. I wish you would lighten up. You will find many posts from me speaking positively about DSS and you'll never find one where I bash a bp/w.

 

[GreenDiverDown]

Tobin, Tobin, Tobin: You are so defensive and so determined to have the last word.

I still don't think you read these threads thoroughly because if you are your taking things out of context or delibertly twisting them to make your own point.

Perception of the casual reader... Sometimes I just can't resist trying to keep the casual readers perceptions in balance but what do you think their perceptions are after reading your posts?

Knowing you're a business owner I have to admire the energy you put into selling your products here on Scubaboard. You do provide sound advice sometimes but if someone takes exception to or questions the "WORD-from-Tobin" you can be comtemptious and scornful. I wish you would lighten up. You will find many posts from me speaking positively about DSS and you'll never find one where I bash a bp/w.

Agreed.

So much for "smoldering", huh Don?

 

[cool_hardware52]

If you can spread the COG over a wider area, the result will not be better balance, but better stability. The 6 pounds you use now is centered in a very narrow area, where a BP will spread that weight out and give you better stability. Think of a tight rope walkers pole.

I agree, with a backplate you will increase your "polar moment of inertia".

If you have a say a 6 lbs steel ball it's fairly easy to start it spinning. If you have a 6lb barbell it MUCH more difficult to get it swinging, because the mass is concentrated at the ends of the barbell. This is one reason why many sports cars are mid -engine, the centered mass makes it easier to turn them sharply. Top fuel dragsters on the other hand are long with the engine at one end and the fuel tank at the other, helps then go straight.

You see the same effect with double tanks vs a single. Very stable, but if you succeed in getting them rotating it takes a lot of effort to stop them. Part of that is simply due to greater mass, but part is also due to where the mass is located.

This one reason why I choose not to make weighted Single Tank Adapters. They raise the tank, raise your center of gravity, and concentrate the mass near the center of rotation. That's great if you are building fighter planes, not so good if you want a stable diving platform. Our bolt on weight plates do exactly the opposite. They move the center of gravity towards the diver, and increase the polar moment, increasing stability. Simple physics really.


Tobin