Re: [PSUBS-MAILIST] emergency lift bags

[MerlinSub@t-online.de]

A 6600 lbs lift bag has still a lot of air in it even if empty.. 
May you have to vakuum it a little before you can use it outside to transport on a sub. 

<Recon1st@aol.com> schrieb:
> Carsten I am talking an air bag in addition to the drop weight. For  sure 
> releasing a drop weight is the way to handle most all situations. I  have 
> two very
> large battery pods 12" dia by 10'  and a large pressure  pod for 
> electronics. If all three
> of these were in a fully flooded state, my 200lb drop weight would  not be 
> enough.
>  
> The lift bag would be just an added safety measure to cover no  matter what.
> It seems like a relatively easy and inexpensive insurance  policy.
>  
> Dean
>  
>  
> In a message dated 12/2/2009 4:22:13 P.M. Central Standard Time,  
> MerlinSub@t-online.de writes:
> 
> To open  the hatch at -1 ft seems a better solution = drop weight. 
> 
> 20 ft = 6  meter depth - hatch of 2ft diameter has a area of 0,283 m2 
> so at 20 ft the  pressure on the hatch wil be stil 1,7 ts. 
> Means in even a full dry boat  with just destroyd mbt you have to 
> flood it and destroy all the interior  by saltwater.. 
> 
> "If you have air a to blow an lift bag - means you have  still air to blow 
> the mbt"
> 
> Lift bag is a good thing to have - on shore  in store at the car close to 
> the diving spot. 
> 
> vbr Carsten  
> 
> 
> <Recon1st@aol.com> schrieb:
> > I am wrestling with  enlarging my MBT's for more  reserve.
> > What I am thinking, is for  sure I need more, but do I  really.
> > As is I have enough freeboard  for normal dive operations. 
> > But am uncomfortable as far as a flooded  outer tank  etc.
> > 
> > or an entangled situation.  
> >  
> > I am thinking that a 6600lb lift bag for emergency use  is  about
> > as good as it gets. If mounted as we discussed earlier  and inflated 
> > from within manually would do a nice job. That much  capability  I
> > could actually surface even under a full flood  situation. The  idea of
> > opening the hatch at 20 ft sure seems a  lot niceer than at 350  ft.
> >  
> > Any thoughts on  this
> >  
> > Dean
> >  
> >  
> 
> 
> 
> 
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