[PSUBS-MAILIST] FW: Casper 2

[Alan via Personal_Submersibles]

Graham,
to do this accurately we would also need the dimensions of the
previous pod & it's battery weight to see what positive or negative
effect it was having. Ie. if it was 20lb negative then that is our
target with the new pod to get your sub back to neutral buoyancy.
Alan

Sent from my iPad

> On 31/07/2018, at 10:14 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Graham,
> what is the wall thickness of the battery pods. Is the 14" the outside
> diameter. Is the length you quoted to the ends of the end caps?
> Are there reinforcing rings in the pods. If so what dimensions.
> Also what is the weight of the batteries. You should be able to get
> that spec off the internet.
> I have the program " Under Pressure" that gives weights & buoyancy.
> I would have to put hemispherical end caps in the equation as thats
> it's limit.
> You might get a better offer from someone with a better program but
> I am sure I could get you in the ball park.
> Cheers Alan
> 
> 
> Sent from my iPad
> 
>> On 31/07/2018, at 9:48 PM, graham bayliss via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>>  
>>  
>>  
>>  
>>  
>>  
>> Hi
>>  
>> my name is Graham Bayliss I  have been building Casper 2 for many years and now find my self frustrated by science I have craned my sub into the water three time only to be frustrated by buoyancy problems I have redesigned my battery tubes to carry more batteries. this has meant they are very buoyant and being on the bottom my boat they tend to want to turn her on her side. My housings measure six feet long by fourteen inches I can not calculate how much weight I need to make these negative buoyancy I have three leisure batteries in each housing plus one hundred and fifty pound of lead on top. this does not counteract the upforce which each housing is subjecting my sub to. I am lost as to how I can over come my problem  as  she is determined to roll . can some one help me please.
>>  
>> regards
>>  
>> Graham
>>  
>> Pictures  of Casper 2 being built are on the site if you need to look at what I have built.
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