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Author Topic: Albert the tug  (Read 57755 times)

mermod

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Re: Albert the tug
« Reply #75 on: August 10, 2015, 12:31:46 pm »

Just looking at motors and it appears I have a couple of 490kv outrunners in the cupboard, might go nicely on a 7.2 nimh or 7.4 lipo, anyone with any thoughts?


Phill
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mark w

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Re: Albert the tug
« Reply #76 on: August 10, 2015, 02:06:36 pm »

Very nice.

Mark
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Tug Chief

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Re: Albert the tug
« Reply #77 on: August 10, 2015, 06:28:48 pm »

The extended engine casing and a H post in it sound great Phill.

In regards to motors this would be my choice; http://www.cornwallmodelboats.co.uk/acatalog/geared_motors.html

A Robbie Navy Geared Motor EF76 3.3:1.  This on 12 volts combined with the 50mm steam pitch prop will give you heaps of torque and excellent performance!

Darren.
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mermod

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Re: Albert the tug
« Reply #78 on: August 10, 2015, 11:54:10 pm »

Ahh tug chief, I see you are old school, I too once only thought in brushed 380's 540's 550's and 785's and the necessary gearing but I have been lured over to the dark side, brushless motors that can be matched to just the right battery for the perfect RPM, no electrical noise and huge run times, I hope that Alberts open plan allows for either traditional or modern set-ups, to aid this I was actually thinking of making the engine casing large enough to fit a good old 6v 4ah gel cell but I haven't been down the workshop to check yet.


Phill
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Martin [Admin]

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Re: Albert the tug
« Reply #79 on: August 11, 2015, 12:54:05 am »


What spec brushless are you thinking of using Phil?
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Ianlind

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Re: Albert the tug
« Reply #80 on: August 11, 2015, 01:27:24 am »

I'm old school also, and as I have boxes of windscreen wiper motors and 12v fan motors just hanging around taking up space, can't see the point in not using them. I've got some Bosch 12v x 12 pole fan motors in the Sirius Cove and they are some of the best I have ever found. Not easy to get these days, but very smooth runners.
I also belt drive my models, so nice and quiet, and you can lower your prop speeds using higher motor revs for greater efficiency. Geared motors like the Robbe are good, but growl. I have one in a small tug and it works well, but not as quiet as I like.


Ian.
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Tug Chief

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Re: Albert the tug
« Reply #81 on: August 11, 2015, 07:07:52 am »

Hi Phil, I must admit that I have not really gotten into the brushless thing as of yet but most certainly something I will look into.  I have about 40 boats in my fleet so will not be changing them all over! :-)

As for the 'growl' of the Robbie navies, I think that it brings the models alive, I have never worked on a silent boat as of yet!.

Darren.
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mermod

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Re: Albert the tug
« Reply #82 on: August 11, 2015, 01:45:33 pm »

Wheelhouse is coming along nicely :)
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mermod

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Re: Albert the tug
« Reply #83 on: August 11, 2015, 01:54:59 pm »

Martin, I have a couple of very nice OS 490kv brushless motors sitting in the cupboard but after getting one out and sitting it in the boat I think it just might be overkill.
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mermod

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Re: Albert the tug
« Reply #84 on: August 11, 2015, 02:07:24 pm »

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Martin [Admin]

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Re: Albert the tug
« Reply #85 on: August 11, 2015, 03:06:53 pm »


Hmmm, yes... unless you want to tow real ships!   ok2
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Tug Chief

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Re: Albert the tug
« Reply #86 on: August 11, 2015, 10:27:28 pm »

It is a tug Martin, modern technology denotes that tugs have the absolute limit of power for there hull, so models must follow suit! :-)

Well that's my excuse and I'm sticking to it! ;-)

Darren.
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mermod

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Re: Albert the tug
« Reply #87 on: August 11, 2015, 11:05:01 pm »

I do like your way of thinking Darren :)




Phill

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Martin [Admin]

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Re: Albert the tug
« Reply #88 on: August 11, 2015, 11:37:02 pm »


Fit two!   :-))
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mermod

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Re: Albert the tug
« Reply #89 on: August 12, 2015, 04:15:41 am »

Seems about right Martin, one for forward one for reverse :)

Phill
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mermod

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Re: Albert the tug
« Reply #90 on: August 12, 2015, 10:34:14 am »

Squeezed in a bit of work on Albert today, lots of different angles to deal with but we finally have a roof.



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mermod

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Re: Albert the tug
« Reply #91 on: August 12, 2015, 10:36:53 am »

You might notice the roof in the previous pics look wet, as it is cut from 3mm and was a bit of a tight bend I had to give it a good soaking with an ammonia based window cleaner, this made bending much easier.


Phill
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mermod

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Re: Albert the tug
« Reply #92 on: August 12, 2015, 10:46:57 am »

My system of tabs with wedges to help hold the curvy bits can't go any closer to the end so this corner is a tad reluctant to close the joint, I'm hoping most people will have a couple of clamps handy to hold them down while the glue sets.










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Ianlind

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Re: Albert the tug
« Reply #93 on: August 12, 2015, 11:14:44 am »

G'day Phill,
What about one or two thicknesses of 1.5 or 1.6 for the curved roof?


Just a thought.


Ian.
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mermod

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Re: Albert the tug
« Reply #94 on: August 12, 2015, 11:33:19 am »

Hi Ian, just adds to the cost and can be hard to find a reliable supplier, no one sells it down here so there would be freight charges also.


Phill

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Barry

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Re: Albert the tug
« Reply #95 on: August 12, 2015, 01:15:23 pm »

Have you tried http://www.balsacentral.com/shop/basswood-ply-sheets/ for plywood.
Cuts nicely with a laser.
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Ianlind

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Re: Albert the tug
« Reply #96 on: August 12, 2015, 01:45:31 pm »

Doesn't mention anything about waterproof though, and with a basswood core would sop up moisture like a sponge.


Ian.
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mermod

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Re: Albert the tug
« Reply #97 on: August 12, 2015, 01:51:29 pm »

Thats a very interesting site Barry, I will have to save that one to the memory banks, from what I can see their sheet size is 300 x 300 and $17 plus freight, not alot I know but I guarantee when it comes to the finished product that price will be my biggest sticking point, at the moment I can buy a nice 3mm pine ply with no voids 1200 x 2400 for the same price as their 300 x 300.
To aid bending tomorrow I will try lasering a series of kerf's into the roof, that should help greatly...............stay tuned


Phill
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mermod

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Re: Albert the tug
« Reply #98 on: August 12, 2015, 01:55:06 pm »

Ian, as for waterproofing have you discovered everdure from international paints, it's my new best friend, 2 part epoxy that's as thin as water, great for waterproofing and prepping for paint and being so thin it soaks right in and doesn't fill detail like sanding sealers, i use it on both models and my full size boat.


Phill
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Ianlind

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Re: Albert the tug
« Reply #99 on: August 13, 2015, 11:02:03 am »

G'day Phill,


Used to use Everdure when I rebuilt a Hartley TS16 Trailer Sailer many years ago. Good stuff, but haven't used it on my model boats so far, as I always use marine grade ply, and seal it with primer. Never had an issue so far, and the Iron Cove was built in 1982 and is still holding together like it was 30 odd years ago.


Ian.




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