Thank you, that was very helpful! Adam
--- In electricboats@yahoogroups.com, AJ Gilchrist <andrew@...> wrote:
>
> Adam
> using a 100' 4000 hp, 55 tonne bollard pull tug as a start point
>
> a 14' model will have
> beam 4.5ft
> displacement 2250lbs
> scale speed 4.8knots - this is very near hull speed so even a lot
> more power wont get you much faster
> 2 of 4 blade props 12*4.3" pitch (in schottel ducts) or one 4 blader of
> 22" x 4.3" - in the end one 12 incher will probably get you moving
> turning at 2050 rpm
> will require 2 motors of 2hp each and 34ft/bs torque each
>
> One will proabbly give you 4.8 knots and let you tow 14 dighy full of
> spectators
>
> Refer to the google god for the details of the items you mention
>
> The Advanced DC Motor #A00-4009 replaces the #A89-4001 they are are 36
> volt motor 63 rpm/v, rated for 80 amps continuous & 300 peaks and
> 6hp-28hp, 6.7" diameter about 10" long, weighing 46lbs (for scale it
> has too much hp and not enought torque if thats important) A lower rpm/v
> figure at a higher voltage will give you the same rpm, draw fewer amps
> and make more torque per amp.
>
> The controller is a metal box as big as a few housebricks full of
> electronics which will cope with the power the motor might draw (it has
> some redundancy) and some safety sensors as well.
>
> For your model to work and move, tow a 20 dinghy full of people no
> problem you will have plenty of power - but to go faster - the question
> is why. The hull will be generating a huge bow wave, which will easily
> consume the power peak any practical batteries can supply, once you get
> much over 5 knots. The handling may be getting interesting too.
>
> Best thing is to find retailers who have this type of equipment not hard
> and talk to them
>
> Andrew Gilchrist
> www.fastelectrics.com
> Australia
>
>
> On 18/07/2012 10:57 PM, Kevin Pemberton wrote:
> >
> > Adam,
> >
> > Radio shack used to sell an electronics learning kit for basic
> > electronics. Seeing is believing. I am not trying to brush off your
> > questions, but it sounds like this type of thing could help you
> > understand what you are looking at without using expensive parts. If
> > Radio Shack is not in your part of the woods look online for an
> > experimenters kit to learn about motor control. All the principals
> > will be the same with only minor changes in equipment.
> >
> > You will likely get all the information you need here but like I said
> > seeing is believing.
> >
> > Kevin Pemberton
> >
> > On 07/16/2012 06:21 PM, adam.riso wrote:
> >>
> >> Hello,
> >>
> >> I am new to the group. There seems to be a lot of great information
> >> on the group available but way over my head. I am in the planning
> >> stage of building a wooden 14' mini tug boat powered by an electric
> >> (golf cart) motor. The plans that I have go into motors, controllers,
> >> solenoids, etc. and I was hoping that someone would be able to
> >> simplify it and point me in the right direction as to what exactly
> >> are the components I need to purchase. One person who built a similar
> >> boat used: Advanced DC #A89-4001 Motor, 6HP/36-72VDC and a Curtis-PMC
> >> #1205-201 Motor Controller, 36-48VDC/350A but I really don't
> >> understand what that all means. I also have questions about what you
> >> use to give it more power (to increase the speed) or but it in
> >> reverse, etc. I appreciate any insight. Thank you! Adam
> >>
> >
> >
> >
>
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