thunderace
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| posted on 6/12/07 at 06:49 PM |
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r/c boat HELP ADVICE NEEDED
i have an rc boat but i need the stuff to go with it.I HAVE A BRUSSHED MOTOR IN IT.
i know i need
a servo BUT WHAT TYPE ??
A SPEED CONTROLLER FOR A BRUSHED MOTOR HOW MANY AMP???
RADIO GEAR WHAT TYPE?HOW MANY CH
I DONT KNOW WHAT ELSE I NEED ??
BATTRIES BUT HOW MANY VOLT ?
there are tones of stuff on ebay but i dont have a clue??
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zetec
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| posted on 6/12/07 at 07:19 PM |
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Brushless motors need a brushless speed controller,might be worth checking with the plane flyers as the motors tend to be rated as volts per rpm
rather than current (I think). If it's just rudder and speed controller then get a Futaba 2 channel, comes with TX and RX and two servos for
about £45. Batteries again will depend on type of boat and size and how long you want it to go for. It would be a lot easier with a normal motor,
brushless tend to be used more for full on racing in very light hulls. Westbourne Models might be able to help, sometimes a little grumpy but they
tend to know their stuff...
" I only registered to look at the pictures, now I'm stuck with this username for the rest of my life!"
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Macbeast
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| posted on 6/12/07 at 08:16 PM |
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He said BRUSHED 
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short track 123
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| posted on 6/12/07 at 08:33 PM |
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I use a 60 amp speed control water cooled in my R/c boat.
It just depends on what sort of boat you have and how fast you need to go.
There is a place in USA that sells a 110 Amp speed controller ( lots of cash needed for that ) but they did set the world speed record
Lots of good info here if you feel the need for speed.
spec
12-14 cells
700 motor
Pic of Boat
Pic of speed con
Boat is a bit tatty now 1 to many craches
Jason
[Edited on 6/12/07 by short track 123]
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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flak monkey
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| posted on 6/12/07 at 08:39 PM |
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Speed controller - get yourself the best one you can afford. You really need to know what type your motor is though. 540, 620, 700 etc
You need one std servo, or a HD one if its a boat over 400mm long or so, but that depends on the type of boat it is.
You need 2 channel radio gear. 27mhz is fine.
Batteries depend on the sort of boat it is. If its a fast one you want some high capacity 7.2 v cells and a fast charger. If its a slow chugger you
want some 12v lead acid batterys and a mains charger to suit.
Sera
http://www.motosera.com
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thunderace
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| posted on 6/12/07 at 08:59 PM |
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its a robbe wetbike
http://www.youtube.com/watch?v=Yz6SZO4Prds
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zetec
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| posted on 7/12/07 at 07:00 AM |
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Ooops, sorry. Bet you changed it while I wasnt looking.
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Macbeast
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| posted on 7/12/07 at 09:52 AM |
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I once took a circular piece of plastic and shaped it to form lobes and then mounted it on a servo. I fixed microswitches to contact the lobes. Two
microswitchs selected forward /slow reverse (ok astern  ) and gave an off position in the middle The motor was fed through a high wattage resistor
to give the slow speed. The other microswitch shorted out the resistor when going forward to give high speed.
So on the joystick, full back gave slow astern, middle gave slow forward and pushed forward gave high speed forward. It worked very well and was, of
course, locost
Motor was powered from 6V gel battery, radio and servos from separate rechargeables to avoid interference from the motor.
But surely the simplest (if the most expensive) would be to ask in a model shop?
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