[PSUBS-MAILIST] CNG installed

Alan via Personal_Submersibles personal_submersibles at psubs.org
Sat Jun 8 17:31:13 EDT 2019


Brian,
However you mount it, it will need to be protected from collision.
You would start descending fast if it ruptured.
From the beginning I was dubious about your concrete ballast tanks,
because of the weight in them. Once the air is out of them you have
a lot of weight in that concrete that is relatively high.
There is probably no stability issue that you can't rectify by adding
floatation up high & weight down low, but it ends up as additional
weight to your sub.
Alan

> On 9/06/2019, at 7:22 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Maybe I could mount it like this  ..lol
> 
> Brian
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
> To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] CNG installed
> Date: Sat, 8 Jun 2019 10:13:03 -0700
> 
> Raising the tank is definitely what I need to do , just not sure if there is enough space there to make a difference , but it's definitely worth a try before I do anything drastic .  I won't start cutting those concrete front wings off just yet.  
> 
>   Just as a side note though, which more of a curiosity ,  I could have a free floating tank with guides that would float up until it started influencing the buoyancy .  
> 
> Brian
> 
> 
> 
>   
> 
> --- personal_submersibles at psubs.org wrote:
> 
> From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] CNG installed
> Date: Fri, 7 Jun 2019 17:59:45 -0600
> 
> Brian.  Just raise the tank as high as possible. Changing to trawl floats will make no difference.
> Hank
> 
> Sent from my iPhone
> 
> On Jun 7, 2019, at 3:29 PM, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Brian,
> Is that faring above the tank a free flooding area & if so can you
> get air trapped in it. There looks to be a foot of space between the 
> Tank & faring; can you mount the tank higher!
> Alan
> 
> On 8/06/2019, at 9:16 AM, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Here is a pic of the tank:
> 
> 
> 
> Brian
> <CNG1.jpg>
> <CNG2.jpg>
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