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Re: [PSUBS-MAILIST]too much mbts

Hi Dean,

When submerged, the mass of the water in the MBT adds to your inertia. The bigger the MBT, the more trapped water mass, the slower you accelerate and decelerate.

On the surface it is only the trapped air bubble under the water line that is adding to buoyancy. The bits of MBT that get lifted up above the waterline no longer contribute to the added buoyancy because it is not actually displacing any water.

An optional way to offset your added weight would be to add syntactic foam. Or you could lengthen the hull.

Regards,
Ray

recon1st@aol.com wrote:
I am having a heck of a time.
First I start with K350
Then I design heavy modifications.
Then I build
Now I am doing design work again.
I know, not a way to run a rail road but circumstances has dictated this process.

My main question to you seasoned sub builders is can you have too mutch MBT
capacity? And or does excessive ballast hurt anything?

I am trying to accommodate many options in the future Robotic arms, more
equipment etc. so I really need to take that into consideration now.

So far I have added about 853lbs to the stock k350 design. Making up for just
this is some what of a challenge, and the additional weight on future additions
has me a little frustrated.

Also I am curious how the fiberglass MBTs hold up in the long run.
Are they problematic in any way for many dives, is this something I should
be concerned with

Would sure appreciate some insight in this area.

Dean Ackman

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