[PSUBS-MAILIST] Surface Transit and power requirements

[Joe Perkel]

Good points all Jon.

Joe



On Friday, November 29, 2013 12:12 PM, Jon Wallace <jonw at psubs.org> wrote:
  

Except for calm lake conditions I don't think a piggy-back generator
    is practical.  On open ocean it is not a simple task to support sub
    dive ops.  Take another look at the "psychedelic sub" video from
    Islamorada this year and note the bobbing of the sub, the divers,
    and the support boat in only 2 foot seas.  Having been in that water
    helping weight-balance Snoopy, I can't imagine trying to load/unload
    a generator (even a small one) from the top of it.

A small semi-rigid inflatable also won't be practical as surface
    support in such conditions.  Doug's 25 foot boston whaler was being
    tossed pretty well and drifting heavily.  Who wants to be 5 miles
    out on the open ocean in a small cramped inflatable fighting wave,
    wind and current?

Jon





>________________________________
> From: Joe Perkel mailto:josephperkel at yahoo.com
>To: Personal Submersibles General Discussion mailto:personal_submersibles at psubs.org 
>Sent: Thursday, November 28, 2013 3:43 PM
>Subject: [PSUBS-MAILIST] Surface Transit and power requirements
>  
>
>
>
> 
>I have a question on my mind that I’d like to pose for ideas. It concerns primary propulsion and the potential use of an electric golf cart motor for long distance surface transit say in the order of 4 to 5 miles one way. 
>  
>What I am thinking is the use of a motor pod ahead of a moveable rudder Delta style. If one were to use say a 5hp motor where 2-3 hp is required, wouldn’t the larger motor be less taxed and run cooler, turn a larger prop,  be more reliable long term, etc?  
>As for power drain, what if a portable Honda generator could ride temporarily on deck behind the sail in a purpose built ventilated enclosure that is quick release removable. Could this not be connected to a purpose built electrical thru hull feeding the main bus?  
>My goals here are simple.  
>1)      The ability to travel to relative distant dive sites with relative ease  
>2)      Reducing a surface support requirement to a small semi-rigid inflatable.  
>3)      The ability to satisfy power drain and on site recharge capability without rafting at sea.  
>4)      Eliminating the complexity and costs associated with inboard diesel propulsion.  
>Ideas / thoughts?  
>Joe        
>
>     

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