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    A Little Advice on Motor Whine
    by neilmc πŸ‡¬πŸ‡§ ( Warrant Officer)
    πŸ“£










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    44 Posts 43 Replies 19 Photos 103 Likes
    ( Newest Posts Shown First )
    Ianh
    Midshipman
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 22 hours ago
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    By the way, Mobile Marine make an excellent alignment tool that can fit a whole lot of shafts and motors.
    See link
    I have one but lent it to a 'friend' still waiting😠😠
    Regards
    Ian
    https://www.mobilemarinemodels.com/alignment-tool-71-c.asp
    πŸ”—
    2
    Only old in years not mind or soul.
    RHBaker
    Lieutenant
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¨πŸ‡¦ Canada
    Online: 4 hours ago
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    Neil,
    The other factor is that is, if it whines it must be running! Sometimes an achievement with brushless motors.
    3
    neilmc
    Warrant Officer
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    I've followed several suggestions Rowen and all have proved the whine remains no matter what. I thought it was an issue as the brushed motor I had before did the same sort of thing. It did however prove to be a badly misaligned installation from previous owner. So I've chased a problem based on rhis fact to one that wasn't really there however removing the old mount it has shown anorher misalignment. So good in one sense just need solve it now with the new mount 😊
    3
    Learning so much more with each reply to my posts. One day I may have a boat in the water πŸ€”
    neilmc
    Warrant Officer
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Slow and steady ... 15 years is definitely slow Martin πŸ˜€
    Although working through lockdown it has focused the mind on how distracting life was beforehand.
    2
    Learning so much more with each reply to my posts. One day I may have a boat in the water πŸ€”
    RHBaker
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    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¨πŸ‡¦ Canada
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    Sorry to hear of your trials and tribulations, but it means I am not the only one who has learnt the hard way about the importance of correct alignment.
    Once you have got it right though, think you may still experience a whine. Brushless motors are inherently noisier that brushed.
    The consolation is they are much faster so the noise will be out of earshot quickly!
    Rowen
    4
    Martin555
    Fleet Admiral
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 7 hours ago
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    Hi Neil,
    With a bit of tinkering and a little time you will sort that mount out.
    Slow and steady bit at a time.

    Martin555.
    2
    If it looks right it probably is.
    neilmc
    Warrant Officer
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Hi Martin
    I think its a combination of my inexperience when I reinstalled the shaft as the glue had perished on the previous one. This now makes things all a little bit tight as I think the shaft is too far in the boat if you know what I mean see photo. Also the brushless motor xmount is a bit to small for the motor mount front plate see photo. I do like the idea of the mount and I'm thinking of trying to remake the front part of the mount. Well I would if I could find the countersink screws for the x mount πŸ˜‚
    Ian the whole alignment and installation of the motor has been a nightmare not only for me but everyone else on this site .... now you as well πŸ˜‚πŸ˜‚
    2
    Learning so much more with each reply to my posts. One day I may have a boat in the water πŸ€”
    Ianh
    Midshipman
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡ΏπŸ‡¦ South Africa
    Online: 22 hours ago
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    Yup
    Alignment is always tricky I normally make a dummy out of Aluminium turned and drilled on the lathe got about 6 now.
    As an R/C Aircraft builder, SLEC is always top class and helpful too.
    Screws always get lost (Normally the small ones!)
    Tip with epoxies I find useful is to make sure when mixed colour is even also check what it can glue as they are now sometimes specific (AS I have found out) Another thing is temperature. Genuine Araldite is bloody good stuff.
    Good Luck
    3
    Only old in years not mind or soul.
    Martin555
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    Country: πŸ‡¬πŸ‡§ United Kingdom
    Online: 7 hours ago
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    Hi Neil,
    Is it possible to reduce the height by sanding and filing, or even cutting if necessary ?

    Martin555.
    1
    If it looks right it probably is.
    neilmc
    Warrant Officer
    πŸ“ A Little Advice on Motor Whine
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    Country: πŸ‡¬πŸ‡§ United Kingdom
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    Well motor mount from SLEC turned Friday not bad for a tenner and delivered in 3 days. As it looks better then the 'wing it mount I put together and the issues its causing I decided to change it.
    Wasn't looking forward to it as I couldn't remember how much glue I had used to stick the supports to hull. Didn't matter as I obviously can't mix araldite as the supports just popped off. I was then left with what looked like toffee which easily came off.
    When using the SLEC mount as designed it proved to be too high and didn't align at all with the shaft. Also couldn't find the countersink screws for the x mount so thought I'd adapt it a little.....winging it again.
    It did however show what could have caused some of the problems as when using the alignment coupling it shows the shaft to be installed at an angle as per photo. So I'm going to give it a go using the motor mount I used before but fix it this time with nyloc's so hopefully providing a more sound solution.
    I shall use a bit of servo tape as Ian suggests to isolate it a little.
    Fingers crossed this time.🀞
    2
    Learning so much more with each reply to my posts. One day I may have a boat in the water πŸ€”
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