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Author Topic: johnson 785/700  (Read 1223 times)

mermod

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johnson 785/700
« on: March 28, 2012, 11:49:49 AM »

Just wondered if anyone knew roughly what a johnson or mabuchi 785 or 700 brushed motor would equate to in brushless?
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essex2visuvesi

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Re: johnson 785/700
« Reply #1 on: March 28, 2012, 11:52:01 AM »

inrunner or outrunner?
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mermod

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Re: johnson 785/700
« Reply #2 on: March 28, 2012, 11:57:59 AM »

It would be for a 700mm long tug so probably outrunner
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Re: johnson 785/700
« Reply #3 on: March 29, 2012, 04:45:14 PM »

Size of prop?
operating voltage?
Required rpm??

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nick_75au

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Re: johnson 785/700
« Reply #4 on: April 02, 2012, 10:45:36 AM »

Don't have the exact specs for those motors, but a
 RE 800 is about 800 Kv
 RE 850 is 485 Kv
Speed 900 torque is about 550 Kv
the slowest speed 700 is about 960 kv
Speed 720 BB torque is about 350 Kv

Maximum  watts are 157W for the RE850 all the others are sub 100w .

Nick
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mermod

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Re: johnson 785/700
« Reply #5 on: April 08, 2012, 09:39:39 AM »

Perfect, just what I needed, thanks nick :-))
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