need ESC & motor
 

hi..im building a boat and trying to figure out which parts i should use...looking for suggestions...
i plan on using a 6volt SLA 10 or 12Ah battery....and im thinking the motor should be a speed 600 brushed.
it doesn't have to be super fast, but not a turtle slow either....decent speed id guess. 10 to 20mph would be nice.

here's the thing, my budget is less then $20 for the motor and less then $30 for ESC, would also like to have reverse.
the boat will be using a single propeller & rudder system...very basic.

here is a photo of the hull i should be using. it's about 29" long & 11" wide

http://img.photobucket.com/albums/v6...scarp/boat.jpg

RE: need ESC & motor
 

how big is the boat
on 6 volts your will be slow with a speed 600

RE: need ESC & motor
 

the boat is 29" long & 11" wide....when you say slow, how slow you reckon?

RE: need ESC & motor
 

more like 10mph

RE: need ESC & motor
 

well if i wanted 15mph-20mph could i not get that speed with a 6 volt SLA ?

RE: need ESC & motor
 

It will be hard to even get 10mph with all that weight. A typical speed 600 motor with 8 cells (9.6v) running in a FE hull would run about 20-25mph.

Using more power will only cut down on your run time. In this case I believe slower is better than less run time.

Ryan

RE: need ESC & motor
 

well run time is more important to me then speed...but if i could get it to 10mph, that would be fine i guess.

RE: need ESC & motor
 

im thinking [link=http://www.advantagehobby.com/product.php?productid=25185&cat=365&page=1]this waterproof ESC[/link]would work but not sure on the motor.

RE: need ESC & motor
 

That would work with most brushed motors. I've ran a 700 motor on 6 cells with that esc in the past.

Ryan

RE: need ESC & motor
 

im wondering what kind of speed i should expect with an 500-600 15+ turn motor...and the 6 volt SLA

RE: need ESC & motor
 

You will only find out after trying. I don't believe you will see over 10mph but there are many variables to consider.

Ryan

RE: need ESC & motor
 

[link]http://www.youtube.com/watch?v=iB-2f6Pbkak&feature=related[/link]

Well...considering this pop bottle (which looks pretty quick actually) is going 7mph, I doubt you'll see 10mph.

Is the battery the same as the Dumas 2 1/2lb battery on the Tower website? If so, that's quite a lot of weight to have for only 6 volts.

RE: need ESC & motor
 

wow that looks so much faster then 7mph.....if my boat went that fast id be more then happy.

the 6 volt SLA battery is something like [link=http://www.ragebattery.com/batterystore/SLA-10-6.html]this one[/link]. it weighs like 4 lbs lol i need a lot of battery life.

RE: need ESC & motor
 

alright looks like ive picked the motor now,

so, that pro boat waterproof ESC w/ reverse and an graupner speed 600 eco 7.2v motor.

RE: need ESC & motor
 

Let us know how it goes.

Ryan

RE: need ESC & motor
 

it might be awhile before i begin the build....but will keep you guys posted.

know any good online stores that carry 3 blade propellers? i think im going to get one in the 30 to 40mm range.

RE: need ESC & motor
 

Offshoreelectrics.com may carry a few 3 bladers in that range. You may find yourself using something larger if only 6v is used.

Ryan

RE: need ESC & motor
 

i was thinking the motor over again, and i was wondering....because that particular model graupner is hard to find in the states...for some reason im not sure. i wonder if i could find another motor/brand that is equivalent in specs & size. low RPM, low current drain, etc.

RE: need ESC & motor
 

http://www.hobby-lobby.com/speed600.htm

Ryan

RE: need ESC & motor
 

id think those RPM's and amps are a bit high....dontcha think..

RE: need ESC & motor
 

If you look at the 8.4v motor they list 9100 RPM loaded. This is rated running 9.6v. Running only 6v will be about 5500RPM. I believe this is about where you would like to be.

Current in amps is not critical at all. The motor will draw as many amps as it wants depending on what prop you toss at it. A smaller prop decreases current draw a larger prop increases draw.

Ryan

RE: need ESC & motor
 

why don't they state how many turns they are...

RE: need ESC & motor
 

The number of turns on any given motor does not tell you anything about it.

Ryan