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Hi Dean. Probably a good choice given the high cost of the new batteries,
and the speed at which the technology changes. What type of charging operation
will you be using for the 72 volt banks? I'll be using 3 banks of three at 36
volts, and plan on charging them in the sub, but I haven't reached that point
yet, so haven't spent any time investigating chargers. I'm pretty sure it takes
a 240 volt charger to pump those things up. I wonder if that will be a problem
finding a suitable power source at the average marina.
Have you gotten your main propeller yet? I was thinking
the "weedless wedge" props that come with the Minnkotas could be improved on. I
have prop rings on the two rear thrusters and was considering up-grading to
multi blade props after sea trials are done. The two side thrusters will have
exposed props so I''ll retain the stock props on those in case I get into
some kelp ( For sure will be trying to cut through some kelp )
It may be I'll need rings on those too, so I don't whack
a whale or something with the props. They can easily be added later. In reading
about Kort nozzles, I know the power is greatly improved with them, and in fact,
Just a simple ring adds quite a bit. If I can't find reasonably priced multi
blade props that fit the Minnkotas, then I'll probably take a swing at making my
own from cast aluminum or maybe fiberglasss.
I'd really like to have brass ones though. Got some time before I need to
switch them out, so that decision can be stalled for a while.
In talking with Vance and the other experienced guys, a
slower moving but larger diameter prop gives better speed. I assume you have
your main motor geared down. What is the prop rotation speed?
There's a whole science behind prop design and I'll need to educate myself
on this a little more before I commit to new props. Well, better get back to
work. That thing ain't gonna build it self! Frank D. It's only a deal if it's where you want to go. Find your travel deal here. |