[PSUBS-MAILIST] Esmae close up 2

[Alan via Personal_Submersibles]

Thanks Hank,
I can't recall whats below the water line, but was thinking that the volume
of any ballast tank around that sphere would have to be at least as much
as the volume of what is showing out of the water plus a litre of air for every
kilo of weight above the waterline. ( I think this is right) If Brian is relying on
the filling of ballast tanks in the tail section to bring the spherical section under
the water it won't happen!
Alan

Sent from my iPad

> On 7/11/2017, at 10:59 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan,
> You may be underestimating the air volume in the main MBT.  I also predicted the sub would  do a nose dive suddenly, but that was before the addition of the new light weight second MBT up front.  There is enough MBT above the water line when most of the sub is submerged.  I think Brian has it, pity he couldnt de a test dip.
> Hank
> 
> 
> On Monday, November 6, 2017, 2:47:46 PM MST, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hi Brian,
> I am not going to win a popularity contest here, but it looks like
> you are going to need a ton more lead & maybe build an extra ballast tank
> around the spherical portion! It seems way too high out of the water.
> If you consider the volume & weight that you have above the water line; is that equal
> to the volume of air that you have in your ballast tanks? I.e. when the air is released
> is it going to be neutrally buoyant?
> It also looks like the ballast tank end will pivot downward from the spherical
> portion when the air is released, & you will have the submarine on a steep angle.
> You would need a lot of lead in the bottom of the sphere.
> I had to rebuild my ballast tanks & add a lot more lead to my sub, but it is
> nowhere near the size of yours!
> Would like to know what the opinion of other Psubbers is as I am open to
> criticism on this!
> Cheers Alan
> 
> 
> 
> 
> Sent from my iPad
> 
>> On 7/11/2017, at 6:51 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> HI All,      
>>                 Here's an enlarged pic of Esmae at dock,  unfortunately I didn't take any video or too many pictures.   But you can see a little better how it sits in the water.  The fact that I didn't get a chance to submerge is really starting to bug me now!   I still have some unanswered questions, namely if there would still be air in my main ballast when fully submerged.. 
>>  
>> Brian
>>  
>>  
>> <Close-up-2.jpg>
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> 
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