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Author Topic: Eco Expert Motor  (Read 1813 times)

BridRacer

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Eco Expert Motor
« on: July 25, 2007, 02:14:11 PM »

Hi all Ive just got a hull and want to put a brushless motor in it but don't have any idea what would be competitive i know the boat had a Kontronic fun 480 in it but the last owner didn't know what model it was as the stickers were removed. the hull is a Hopf evolution any advice would be appreciated

Many thanks Chris
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Andy

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Re: Eco Expert Motor
« Reply #1 on: July 25, 2007, 05:30:19 PM »

You will need a motor with around 3200 - 3400 rev's per volt.
Kontronik have a Fun 480 - 33 (3300),but there are many other makes.

Andy
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BridRacer

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Re: Eco Expert Motor
« Reply #2 on: July 26, 2007, 01:04:27 AM »

Hi Andy and thanks for the info i will have a look to see if i can find a fun 480-33 then cos the motor mount was made for that style of motor so would make life easier

Thanks Chris
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roycv

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Re: Eco Expert Motor
« Reply #3 on: July 26, 2007, 10:41:38 AM »

Hi Andy, can you say why you recommend that motor RPM speed please? 

On 6 volts that is 20,000 rpm or have I got it wrong?
Does the motor slow down when under load?

I thought that a 3 phase motor liked to run at a constant speed.
Any other tips on brushless motors would be appreciated.
regards Roy
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ukengineman

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Re: Eco Expert Motor
« Reply #4 on: July 26, 2007, 10:54:34 AM »

The KV figure or rpm per volt is the unloaded speed. Depending on the prop, the motor will slow down under load - possibly quite a llot. Brushless model motors are better described as electronically commutated rather than three phase, the speed controller constantly senses the position of the shaft and energises the windings at the correct time.
Alan
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BridRacer

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Re: Eco Expert Motor
« Reply #5 on: October 21, 2007, 10:19:27 AM »

Hi all after much debate i went for a fun 480 37 and the boat goes like stink even tho i had a few teathing probs like a bad rudder linkage. Have now found that my cells are not upto much so have to get a new set and then i'll be racing again :) or trying to
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Bridkid

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Re: Eco Expert Motor
« Reply #6 on: October 23, 2007, 08:34:13 PM »

Yep, it does go well after 'Uncle Ian' fixed the rudder linkage!
Cheers Chris,

Ian.
 8)
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