Re: [PSUBS-MAILIST] One/Two person

[MerlinSub@t-online.de]

Make sure that the trolling motor controller works with sonar and echosounder. 
My minkota stepless pulsmodulation controller makes very much "noise" and the side scan sonar is useless. 
The smaller thruster have step controll and works well with the sonar. 

vbr carsten

<ShellyDalg@aol.com> schrieb:
> Hi Rick. Congratulations on your new adventure.
> The voltage used is usually determined by what the major components  
> require. My psub project is using Minnkota S101 salt water trolling motors. I  
> have elected to use four of the same type for ease of maintenance. I can keep a 
>  couple of "spares" with me when I'm out exploring, simplifying a 
> replacement  should it be needed.
> I bought these from some nice people on line at 
> _www.trollingmotorparts.com_ (http://www.trollingmotorparts.com)  and the  price was very reasonable. 
> The speed controllers that are available through them are simple  
> "plug-and-play" and the whole system has been designed and manufactured by a  
> reputable company who is the industry leader in this type of motor.
> Minnkota has conducted a lot of research and development in producing  
> their line of products, and I would bet that we would have a tough time putting  
> together a system as reliable or efficient in power usage as these.
> There are some methods of upgrading the seals to ceramic type, and much  
> information is available through psubs archives and member's advice on the  
> options for pressure compensating the motors for deeper operation.
> The motors I'm using are 36 volt, and draw 46 amps at full throttle, so I  
> will be using battery banks at 36 volts each. The motor controllers are  
> designed specifically for these motors, are fairly inexpensive, completely  
> sealed in epoxy, and most importantly, easily replaced should one fail. I'm a  
> big fan of "off-the-shelf " parts because I don't want to be out some where 
> and  broke down because I can't get the parts to fix the sub. 
> Many of the electrical items we use can be adapted from automotive or  
> marine applications. Other than the thrusters, 12 volt devices are very common  
> on cars and boats, so that's where we can find some of the things we need. 
> Because I don't want any shafts penetrating my pressure hull, I've  opted 
> for electrical systems for all of the external devices. For me, the  
> simplicity of electrical connectors and actuators makes a lot of sense. My  rudders, 
> dive planes, and future manipulator arm are all powered by 12 volt  linear 
> electric actuators. These are "off-the-shelf " actuators designed for  
> automobile applications. sealing them is the key. 
> Control is achieved with simple "rocker " switches making the task of  
> installation very simple, and replacement is both inexpensive and quick. The  
> hull penetrators  are small, and completely sealed with epoxy, minimizing  the 
> chance for leaks. Each thru-hull has a ball valve on the inside, with spade 
>  terminal connectors so if a leak develops, I can pull the wires off and 
> close  the valve.
> With a simple battery switching system, fuse blocks, and a small on-board  
> supply of replacement parts, I hope to be able to affect repairs, should it 
> be  needed, and minimize the dangers of failed systems.
> To me, simplicity and redundancy are the biggest advantages to keeping the  
> sub operational under differing conditions.
> Here's a couple of pictures of the system and parts I'll be using on my  
> sub.
>  
> http://www.frappr.com/?a=viewphoto&id=1578526&pid=10875159&myphotos=1
>  
> _http://www.frappr.com/?a=viewphoto&id=1578526&pid=10874732_ 
> (http://www.frappr.com/?a=viewphoto&id=1578526&pid=10874732) 
>  
> _http://www.frappr.com/?a=viewphoto&id=1578526&pid=10993176&myphotos=1_ 
> (http://www.frappr.com/?a=viewphoto&id=1578526&pid=10993176&myphotos=1) 
>  
> Although I'm the only one I know of taking this approach, I'm confident  
> that with a little tinkering, I can make this system both convenient and  
> reliable.
> Good luck with your project, and I hope to be able to see your sub when  
> finished.
> Frank D.
>  
>  
>  
> **************Dell Mini Netbooks: Great deals starting at $299 after 
> instant savings! 
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> 




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