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Author Topic: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG  (Read 2851 times)

old shrimper

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A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« on: May 30, 2013, 07:19:15 AM »

HI GUYS / GIRLS
I was just reading the article in the latest model boat magazine about OUTRUNNER MOTORS ( love the look of the outside case /end plate spinning ,especially if its all anodized )
very nice
is there a  downside to them ( except the price )  ? are the reversing ESC reliable ?
i was thinking of one round the 38/45 size for my tug build (amsterdam kit with bigger prop and nozzle  ) i see they say voltages from  3v to 11,1 volts
is 12v to much for them ? [size=78%]they offer brushless ESC from 6 to 12 v ?[/size]
can you run a brushless set up   with a normal 3ch flysky 3GTB controler ?
cheers Bob
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imsinking

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #1 on: May 30, 2013, 10:44:38 AM »

Aren't brushless not too good at low rev's ? Dont think they've got the torque low down . . . .& a tug halfway out of the water at full chat ? wont look right somehow  :embarrassed:
Bill  :-X
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essex2visuvesi

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #2 on: May 30, 2013, 11:20:17 AM »

Depends on the motor, some of the outrunners can be slow revving with oodles of torque
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Martin [Admin]

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #3 on: May 30, 2013, 11:32:21 AM »


Yes, but you do have to choose your motors and controllers carefully.
Yes, you can get reversing Brushless ESC's ( make sure it's reversing, not reversible! )
For slow control of Brushless motors, you'll probably need "sensored" motors & ESC.
Have a look at motor set-ups for "Rock crawler" cars.
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mermod

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #4 on: May 30, 2013, 11:43:38 AM »

My Star Perseus was my first ever brushless boat, 1.6 long  takes two men two lift it, even then its a struggle, runs 2 x 510 kv motors ( 45 size nitro replacement ) tiny little things compared to what I'm used to, 12volt 24amp battery and two 60amp hawk speed controllers, will run happily for 8 hours straight with heaps of power in reserve and great low speed control.
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Mad_Mike

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #5 on: May 30, 2013, 12:07:30 PM »

speaking of slow brushless out runners i found this on ebay the other day. The minium input voltage is 11.1v which will be nice lazy 2997 rpm unloaded.  Though At 50 65 pretty big mind you:
http://www.ebay.co.uk/itm/221223835113?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2648
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old shrimper

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #6 on: May 31, 2013, 03:39:24 AM »

so does this one spin to fast  for a 68mm prop ? ( how do you tell the rpm ? is it kv x by battery voltage ) say 500 kv  x 12v = 6,000 rpm?
im looking for about 5 to 8 mm shaft
will they run OK on 12v ?


http://hobbyking.com.au/hobbyking/store/__4652__KD_63_24L_Brushless_Outrunner_193Kv.html
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Mad_Mike

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #7 on: May 31, 2013, 11:48:24 PM »

Yes you are right on the rpm. It is kv of motor X voltage.
That motors out of stock and way oversized for what you will need. Plus its got some bad reviews on there with the magnet coming off an all. I wouldnt bother with it. Youl want about 3500rpm for that prop so youl need a motor either around 300kv on 12v or 600kv on 6v. Going with the 300kv one will give you better economy and more rev range. The 600kv will be a cheaper motor. If it was me if put me money on this:
http://hobbyking.com./hobbyking/store/__18170__Turnigy_Aerodrive_SK3_4250_350kv_Brushless_Outrunner_Motor.html
350kv on 12v is 4200rpm. A bit over speed but a little extra welly on the end of the throttle range wont hurt now :-)) 
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old shrimper

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #8 on: June 01, 2013, 01:04:38 AM »

hi MAD MIKE
thanks for that info an LINK
ill pick one up
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big bill

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #9 on: September 15, 2013, 07:03:43 AM »

gday guys , i dont know much , i am about to experiment w brushless , and would love some info , on speed controls
BUT if you want too chew stumps and pull out trees , i do , go w tooth belt g/boxes ,say 2.5 :1
on a german site they use .46 brushless w 2.5:1 g/boxes to turn 90 mm props , and they spin up a storm !!
i intend to try a graupner s/control , or may be a hobbyking version .
i have tried a buggy version , it was lumpy and not very good , but it was only a cheap chinese, so it might work ,but the braupner ones seem smooth and give good control
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Gerardy

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #10 on: October 18, 2013, 08:48:28 AM »

Are you exercising sailing?

big bill

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #11 on: October 18, 2013, 11:42:18 PM »

gday ,
 i dont understand the question ??
do you ask , am i sailing models ?? i sail w the warrnambool MBC, which i helped set up yrs ago ,i have a fleet of over 10+operational models , mainly electric driven vessels , but theres almost 5 yachts in the shed
i have purchased some brushless to try out +1 buggy speed control , motors .25+.32 glo =
i did say i didnt know much, but the t/belt set up was being used by other modellers , w success, and seems the way to go , as it allows the revy brushless to rev , and not over draw Amps , much in the same way we fit t/belt g/boxes to 545 motors , to drive bigger props , tugs etc
is there a question in there ??
regards bill s
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big bill

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Re: A FEW Q ABOUT OUT RUNNER MOTORS FOR A TUG
« Reply #12 on: October 28, 2013, 10:33:08 PM »

current draw backs are , you need 1 s/c to 1 motor , and i dont know yet , a good boat s/c , possibly graupner ?? buggy versions tend to be lumpy ,for a scale boat we really want smooth control , then the cost of the motor+s/c add up
in a scale type vessel , i think we need a g/box , to allow the motor to rev , but not load it up , ie tugs
there are a number of go fast scale type models running well ,w direct drive brushless , i suspect larger type of motors =.46 glo
bill
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