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π¬ Re: Norman McLeod Rogers
6 months ago by π¬π§ Seaspray (
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HI John I'll have a go at that thanks
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π¬ Re: Norman McLeod Rogers
6 months ago by π¬π§ JOHN (
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hi Martin, if you removed those thick lumps of plywood from underneath the motor mounts - shaved a bit off the bottom of the motor mounts - so they fit snuggly into the bottom of the hull - using this method would this not allow you to fit the motors directly in line with the shafts and dispensing with the belt drive.
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Seaspray (
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Hi John I'll switch to MFA Low drain 550s. See you have supports running parallel to support the mounts. Will copy that idea looks sound. Something in the back of my mind said to resin / fibreglass the inside of the hull. It may need it in future Will make them out of ply as it will make a strong mountings. Many thanks again π
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Remove Ads π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ JOHN (
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Seaspray (
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Rowen So am I and finding the problem it may help others Alignment, it was near enough spot on. When the Mtroniks and motors were set up on the work desk. There was no screaming, till I pressed down on the running motor. what a relieve I won't have to spent any more money well, for a wee while. Looking at two methods. Rubber belt drive and have ordered 3 sets different sizes, as suck it and see job. The brass coloured pulleys were bought from MFA. Other mount is on a rack of pieces of wood for a mount and the motor secured by elastic bands. This'll mean the motors will be in a upside down situation. Mean while doing some investigation on dumpy mounts to get an idea of things.
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π¬ Re: Norman McLeod Rogers
7 months ago by π¨π¦ Rowen (
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Glad resolved.
Rather suspect vertical misalignment might have become a factor. Be better off with a belt drive anyway, overcomes a multitude of issues. Always great to get to the root cause of an issue, then we all learn. ▲
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Colin H
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Seaspray (
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Hi ToraDog Went on to the site you gave a link to and signed up. I'll look thru and see what is what. It'll depend on what motors I get and will put the Graupner motors to the back of the cupboard. Thanks again
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Remove Ads π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Seaspray (
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Thanks John I am open to the upside down motor idea. Meanwhile looking at alternative motors and size. Also I applied fibreglass to the hull around the prop ends and the further two compartment aft. Scrapping the belt system will try and have a direct coupling setup if possible. Took ages to line up the belts.
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ JOHN (
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Hi,
Hows about mounting the motors upside down? That should give you ample clearance between your hull and the motors - and - you will be able to mount them closer to your prop-shafts. I have done this myself on the Seaforth Clansman and it works just as good as normal mounted motors . But as they say one has to suit oneself :-) Johnπ€ ▲
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Peejay
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π¬ Re: Norman McLeod Rogers
7 months ago by πΊπΈ ToraDog (
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As previously stated, the ESC's cause the sceaming noise due to their frequency response. There is nothing wrong wit them, so don't toss them away. There are other manufacturers that make ESC's with very high frequency responses that are completely silent. I will include a link to the company I have been using, but there are others.
Save your Vipers for another use, like regulating a smoker. ▲
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ dave976 (
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It's the motors that are causing the noise. The Esc uses a high frequency to switch the current to control the motor and it is this frequency you are hearing through the motor windings. It was quite a common problem in the 90's and some escs allowed selection of different control frequencies to alleviate the problem. Mounting the motors to a wooden block on a wooden hull may also be amplifying the noise. Perhaps using some rubber or silicon as a mount would help. I can't see any suppression capacitors on your motors and they may also help with the noise issue.
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Seaspray (
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Colin Just to make sure the motors are spot on with the propshafts as the mounting bracket are not the best as they won't keep the belts tight by them self. Belt and braces
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Colin H
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π¬ Re: Norman McLeod Rogers
7 months ago by π¬π§ Colin H (
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Just curious, if the motors are screwed down, then why do you need to add tie wraps.
I have never had a motor mount come loose in 50+ years. Cheers Colin. ▲
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