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Author Topic: 71" (1.8m) TID Tug Build  (Read 21921 times)

Captain fizz

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Re: 71" (1.8m) TID Tug Build
« Reply #125 on: January 29, 2018, 11:29:50 PM »

Your build is coming on a treat Daz.Love the straps on the rudder and skeg, it's the details that count! :-))


Simon
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tizdaz

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Re: 71" (1.8m) TID Tug Build
« Reply #126 on: January 30, 2018, 12:04:10 AM »

Your build is coming on a treat Daz.Love the straps on the rudder and skeg, it's the details that count! :-))


Simon


Thanks for the kind words :) ...yup its coming along slowly!


New link for video as I cant edit previous post:


http://www.tizdaz.co.uk/forum/showthread.php?tid=12

tizdaz

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Re: 71" (1.8m) TID Tug Build
« Reply #127 on: February 12, 2018, 06:19:28 PM »

So today was THE day!

Decided to go New Brighton with my pops to give her a water test (moment of truth as they say!) ..Turned out great, Still needs more ballast as I expected, But the 12-volt is plenty so no need for me to mess about with 24-volts :)

Anyway here's a quick vid!


http://www.dailymotion.com/video/x6enou8

nemesis

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Re: 71" (1.8m) TID Tug Build
« Reply #128 on: February 12, 2018, 06:33:34 PM »

Very good, the point on the bottom of the transom should just break the water, nemesis
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ballastanksian

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Re: 71" (1.8m) TID Tug Build
« Reply #129 on: February 12, 2018, 09:26:47 PM »

Looking good Daz  :-)) The rudder looks the part.
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tizdaz

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Re: 71" (1.8m) TID Tug Build
« Reply #130 on: February 12, 2018, 10:23:01 PM »

cheers guys :)


Quite a relief when I didn't see any water in the hull! lol


Remember this is my 1st ever build so I was a little shaky! But now I can continue on with build, going to finish the electric box, then I will fix the deck & then i've got some Easy 1 Filler which i will seal the deck with.


Heres quick pic from today's test (only pic I got!) apart from the vid


derekwarner_decoy

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Re: 71" (1.8m) TID Tug Build
« Reply #131 on: February 12, 2018, 11:48:05 PM »

It  is certainly interesting that after all of the trials & tribulations  %) for 24volt control systems, that a 12 volt supply now appears adequate

During the dry test, the motor presented an interesting resonance from startup.....equating to the sound of a constant speed fluid coupling drive approaching final speed

The dry test disappointingly did not display any clear motor speed control especially at lower shaft speed

So whilst higher shaft speed may be required for towing/manoeuvring work, a little more ballast aft may also be required to minimise initial cavitation

Derek
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tizdaz

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Re: 71" (1.8m) TID Tug Build
« Reply #132 on: February 13, 2018, 12:15:05 AM »

It  is certainly interesting that after all of the trials & tribulations  %) for 24volt control systems, that a 12 volt supply now appears adequate

During the dry test, the motor presented an interesting resonance from startup.....equating to the sound of a constant speed fluid coupling drive approaching final speed

The dry test disappointingly did not display any clear motor speed control especially at lower shaft speed

So whilst higher shaft speed may be required for towing/manoeuvring work, a little more ballast aft may also be required to minimise initial cavitation

Derek


Hi Derek :)


To be honest on the dry test in the video I didn't really do low throttle much as when low RPM it was quite noisy & it was late night & I live in a flat so my neighbours wouldn't have been too happy!


But on this water test at low rpm she plodded along nicely & was very quiet/smooth, in this vid it was mostly 1/2 to full throttle (again very quiet & smooth) as i wanted to test the power on 12-volt would be enough (which it definately is) ..yup she is going to need around a further 10kg in terms of ballast which I expected :)

nemesis

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Re: 71" (1.8m) TID Tug Build
« Reply #133 on: February 13, 2018, 02:32:59 PM »

It is surprising just how much ballast these tugs take to get down on the waterline, also they were not that fast in real life, about 7/9 knots, enough for harbour work, so your test went well.nemesis
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tizdaz

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Re: 71" (1.8m) TID Tug Build
« Reply #134 on: February 13, 2018, 08:51:28 PM »

hiya,


yup needs a fair amount of ballast! I had a rough idea from the start of this project that i would need around 50kg ballast, seems i wasn't far off!

captain bligh

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Re: 71" (1.8m) TID Tug Build
« Reply #135 on: February 14, 2018, 12:01:13 AM »

Looking good and plenty of running time with all the batteries  :-))
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