[PSUBS-MAILIST] Diver propulsion vehicle project

[vbra676539 at aol.com]

Jon,
Might as well ask. What's your total investment going to be? This looks like a pretty good experimental option for subs, at the very least. I'm with you on the motors. It will be interesting to see just how tough they are.
Vance



-----Original Message-----
From: Jon Eide Pettersen <jon at pettersen-prod.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Thu, Jan 23, 2014 1:24 pm
Subject: Re: [PSUBS-MAILIST] Diver propulsion vehicle project


          
    Thanks for the kind words!
    
    The nozzle/shroud has an inside diameter of around 303mm at the    narrowest. Both the nozzle and the prop are replacement parts for    the commercial DPVs made by dive-xtras. The shroud cost 70.50$,    while the propeller kit is 67$. I bought it directly from dive-x    here:    http://www.dive-xtras.com/cart/pc/viewPrd.asp?idproduct=42&idcategory=7.    
    
    A nice feature with the propeller is that it has variable pitch, and    that the blades can be replaced individually. However, the blades    are plastic and I'm not sure how well they would survive an impact    or entanglement. The scooters from dive-x have a clutch to save the    prop in case this happens. Here is a drawing of the propeller    assembly used by dive-x:http://www.dive-xtras.com/pages/support/diagrams/linedrawings/propellerassembly.pdf
    
    I bought the motor from www.goldenmotor.com. I'm not impressed by    the build quality, but it was very cheap and hopefully it will work.    They also have 650w and 800w editions of the same motor, perhaps    this would be suitable for use in a submersible?http://www.goldenmotor.com/BLDC%20Motors%20for%20Light%20Weight%20Trikes.jpg
    
    
    - Jon
    
    
    
Den 23.01.2014 16:16, skrev      vbra676539 at aol.com:
    
    
And          barring that, how about a 36 volt 3/4 hp PM motor, housing and          drive? It would be sweet to cook something DIY up that could          be built by a competent home machinist.        
Vance
          
          
          
-----Original Message-----
            From: Alec Smyth <alecsmyth at gmail.com>
            To: Personal Submersibles General Discussion            <personal_submersibles at psubs.org>
            Sent: Thu, Jan 23, 2014 9:10 am
            Subject: Re: [PSUBS-MAILIST] Diver propulsion vehicle            project
            
            
              
Hi Jon,                

                
                
Welcome! That is a nicely documented project, and                  very timely since we recently had threads about kort                  nozzles and magnetic couplers. Quick question... could                  you tell me what diameter that nozzle (aka shroud) is                  and how much it and the prop cost? I'm curious about                  adapting those to trolling motors.
                

                
                

                
                
Best,
                

                  Alec
              
              

                
                
On Thu, Jan 23, 2014 at 8:47                  AM, Jon Eide Pettersen <jon at pettersen-prod.com>                  wrote:
                  
Hi!
                    
                    I'm currently designing and building a diver                    propulsion vehicle with a magnetically coupled                    drive. I will use a 48v 500w BLDC motor intended for                    electric trikes, powered by 4 SLA batteries coupled                    in series.
                    
                    I'm posting my progress at my personal website, http://pettersen-prod.com/project/dpv/index.html.                    
                    
                    Anyway, hope you find this interesting! I hope to                    build a submersible in the future, but this will                    suffice until I have the funding and knowledge                    needed :)
                    
                    
                    Regards, 
                    Jon Eide Pettersen
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