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    Hot motors
    by highwayman πŸ‡¬πŸ‡§ ( Leading Seaman)
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    23 Posts 22 Replies 2 Photos 30 Likes
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    Nerys
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    πŸ“ Hot motors
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 8 hours ago
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    Hi Highwayman, that's right shipmate, you come over and join us sailing people, we don't get those nasty motory things worrying us. In any case, they say that they won't last, they're against nature, for one thing they'll run out of all that juicy stuff that they run on and where will they be then.

    Nerys
    1
    When the winds before the rain, soon you may make sail again, but when the rain's before the wind, tops'l sheets and halyards mind
    Martin555
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 6 hours ago
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    Hi highwayman,

    RE:- Might just go over to yachts.

    Now that is a hole different game altogether. so I have been told.

    Martin555.
    If it looks right it probably is.
    highwayman
    Leading Seaman
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 12 days ago
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    After talking with Mtronics it would seem that 4amps is not an unusual draw for 400 motors. 2 400's in the Pilot boat was considered to be pushing it a bit. When compared to the Race400's recommended by Aeronaut then the Mtronics 400were of much higher revs. I have 2 unspecified 380's at much lower revs, slower but no issues. Might just go over to yachts.😁
    1
    highwayman
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Awaiting for a call back from mtronik. latest test proves faulty motors. MT specification states 12v nominal 1 Amp current. After buying a new multimeter, mine was 30 plus years old I ran a motor from 12v 7amp hr battery. After 2 minutes the motor was drawing 2.87amps and the casing temperature was 47 degrees C. I await the call.
    2
    Martin555
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 6 hours ago
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    Sorry to have to say it but It sounds like redpmg is right these motors are faulty and need to be replaced by the supplier.

    Martin555.
    1
    If it looks right it probably is.
    highwayman
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Yes
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    Martin555
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    So are you saying that the motors are not connected to the prop shafts. ?

    Looks like my post crossed yours Red.

    Martin555.
    If it looks right it probably is.
    redpmg
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 16 hours ago
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    Hi HW ,
    Take it you mean they are simply clamped down with nothing attached.
    If that's the case it would seem you definitely have a pair of duff motors .
    Think you need to be having a few serious words with mtronics
    You might also think about getting a pair of 385 motors instead - much more torque with 5 poles - and unless its a speed boat work much better - but beware like the 400s there are some serious amp eating versions around - ask your supplier for advice and get a pair that will happily run on 7.2v.- ones rescued from better halves old hair dryers prefer 19 to 24v.........
    1
    highwayman
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    I have a bench no load fixture I made. they get extremely hot under no load after 5 minutes at max stick movement. They should be operating well within tolerance.
    1
    redpmg
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 16 hours ago
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    Hi HWman- Martin has led to another chain of thought - are the motors connected up to your propshafts ? - if so another silly question - are they filled with grease or an oil mix?

    Very first RC boat motor ran very hot - struggled for power - had taken advice from a magazine and filled the tube with Lithium wheel bearing grease. Joined a club and the first bit of advice was clean it out - use an oil mix with a spot of grease to thicken very slightly . Problem solved , boat planed easily - motor ran cool ...........
    Now use a touch of Silicone grease with two stroke oil ( left over from Seagull days)
    1
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