Fleetscale Yamato

Victorious · Post by **Victorious** » Sun Feb 12, 2006 6:10 pm

The onlt thing I can suggest, is to buy the book, Anatomy of the Ship Yamato. Everything you need are in these books, but the drawings are too a much smaller scale.

Irish Yamato · Post by **Irish Yamato** » Mon Feb 13, 2006 12:00 pm

Yup I have that book but it doesnt give any lines for the hull plating...Thanks though

John John

Irish Yamato · Post by **Irish Yamato** » Tue May 09, 2006 5:18 am

Hello Gang,
Well its been a while but I have been very busy few weeks, unfortunately not too much of it was spent on the Yamato but I�m here with a few pictures and updates.

The pine Keelsom went in easily, and has added a decent amount of structural strength to the hull. I will be adding a few bulkheads before I seal down the deck. The four Props and shafts were installed fairly easily, Superglue held them in place as the Epoxy set.

The aft deck, which will have a removable hanger well in it (for access to the rudders) went in easily and looks good enough for me. The larger rudder needed to be trimmed as the stem on the underside of the hull was too big, Ill be lengthening the rudder to get it to fit as it should have with the proper looking shape.

The smaller rudder looks like it will not add anything to the turning ability as again the width of the stem seems too big that it blocks nearly 30% of a fully deflected rudder�

Underside of the aft hull, props sealed in place and rudders resting waiting for the sealing
On the building slipway, the pegs are holding on the rim for the deck to rest on.

Now again I need some advice. I have no clue about the electrics of R/C Boats

To power the hull I have a 4 spare 600 8.4 volt motors by Ripmax, and a spare 12V 12 Amp battery. How do these sound to you guys. I am looking for time on the pond, not a speed boat but enough for it to look decent or a bit of a back-up if I need to get out of a swans way.

Thanks guys

John John

bismarck builder · Post by **bismarck builder** » Tue May 09, 2006 5:36 am

Hi Irish
I would go with 4 12 volt 7 amp jel cells they make for good ballest and 1 will power your smoke generator 1 each will power each bank of motors and the last one will power everything else guns lights & sound. I would go with the Swiss motors that Victorious mentioned as they are the muts nuts , You will need to add on off switches for all the batteries as well as the abillity to charge in side the hull ,The batts you can get from Maplins at less than �20 each fibra optic cable for lights can also be found at Maplins the motors i think can be found at Model Motors Direct,i am sure that the Admiral will point you in the right direction so far you are making good progress its the little things that make a lot of difference just a coat of grey paint and it will change your out look on the Yamato,
Well done & keep posting
cheers
gary rowe
BPMBC
building Scharnhorst at the moment

Victorious · Post by **Victorious** » Wed May 10, 2006 4:19 am

I agree what Garry has said, use independent batteries for each motor, if you want long running times. You will need two speed controler's, each one running 1 pair of props, 2 outboard and two inboard. Use your 12volt 12 amp batterie for operating all the auxillaries, such as gun turrets, lights and any other operating parts you may decide to add to the model.

So far it is looking great, but you have a long long way to go yet with all that armament. Good luck, take your time and you will succeed.

Irish Yamato · Post by **Irish Yamato** » Wed May 10, 2006 5:06 am

Thanks Gents

1st. What motors would you recommend Vic? And would the 12V 7 Amps work for them? (make and model)

2nd. I was going to use a single large Servo for turning the turrets, connected by a snake..... Is there another option?

3rd. What speed controllers would you recommend (make and model).

Thanks
John John

Victorious · Post by **Victorious** » Wed May 10, 2006 12:12 pm

Irish Yamato wrote:Thanks Gents

1st. What motors would you recommend Vic? And would the 12V 7 Amps work for them? (make and model)

2nd. I was going to use a single large Servo for turning the turrets, connected by a snake..... Is there another option?

3rd. What speed controllers would you recommend (make and model).

Thanks
John

With a model as large as Yamato, I would go for 4 Bulah 800 Motors. These run on 12volts/ 18 volts/24 volts. Running them on 12 volts will naturally give you less speed, as they will be running on the lower voltage range of these motors. It is a matter of trial and errror and if running too slow, you could wire a 12 volt and 6 volt battery in series, which will give you 18 volts, or two 12 volt batteries in series to give you 24 volts.

The Bullah 800 is quite a hefty motor and should give enough power on 12 volts, if you are running four of them.

12 Volt 7 amp batteries will be okay, but you will get longer running times if you run on 12/10amp or 12/12 amp.

Regarding Speed Controllers, I always use Electronize 15 amp 6 to 24 volt Model No 43HX. These should be sufficient to run two 800 motors. Not the cheapest, but they are very reliable and can be repaired. They come with an in line fuse.

http://www.electronize.com

As far as operatiing turrets, is something out of my depth at the moment as I have not actually done this yet. So maybe someone else can help you.

Irish Yamato · Post by **Irish Yamato** » Fri May 12, 2006 12:42 pm

Garry and Vic thanks again for your help

I cannot find Bullah Motors anywhere, Do you have a link to them?

Im waiting on the 2 Speed controllers and its getting better, Thanks
John John

Victorious · Post by **Victorious** » Fri May 12, 2006 4:07 pm

You can order your Bullah Motors at Steve Webb's

http://www.stevewebb.co.uk

You can also order the universal couplings to join your motor shafts to the prop shafts, from here as well. The Bullah 800 motor has a 6mm shaft, and my prop shafts on the Vic have a 4M thread. So if your shafts are the same you need to order 4 sets of couplings 6mm to 4M thread. You won't find them on his webb site, but if you Email him and tell him what you want, he will get them for you. Better to ring really, then you can explain what you want.

Irish Yamato · Post by **Irish Yamato** » Mon Jun 12, 2006 2:05 am

Hello Gents...can anyone recommend a type or brand of grease to lube the prop shafts and rudder tubes please?

John John

Victorious · Post by **Victorious** » Mon Jun 12, 2006 4:26 am

On the Victorious, I have used the Castrol grease available in small tubs from Halfords.

Draw some into a syringe, without the needle attached, so that the opening at the end where the needle fits, is large enough to suck up the grease.

Take out your inner shafts and put the end of the syringe into each outer prop shaft opening and squeeze in the grease. You only need about an inch or so, as when you replace the inner shafts, it will push the grease through all the way. Just recover the grease extracted.

You may need to repeat this proccess once every five or six sailings, just to make sure that water will not enter the hull.
The grease is much better than oil, as it will keep the shafts watertight sufficiently, until the grease becomes useless. Just regrease when this happens.

Irish Yamato · Post by **Irish Yamato** » Mon Jun 12, 2006 8:52 am

Vic you're a legend

John John

Victorious · Post by **Victorious** » Mon Jun 12, 2006 10:00 am

Irish Yamato wrote:Vic you're a legend

John John

No problem, only too happy to help.

Geoff

Irish Yamato · Post by **Irish Yamato** » Tue Jun 13, 2006 8:22 am

Ok now I am in deep trouble

I have the 4 motors (12V 800's) and for power I wanted to use 4 12V 12Amp batteries.Means they are heavy but I need it for ballast too.

With 2 motors in a loop with 2 of the batteries will my ESC rated at 6v to 12v and a 20Amp Curent limit be ok?

John John

klein loewietje · Post by **klein loewietje** » Tue Jun 13, 2006 10:18 am

If you place your motors and batteries in parallel loop, it'll work, but don't put your batts in serial, makes the voltage to high (24V) for your esc.

Greetz, Johan

Victorious · Post by **Victorious** » Tue Jun 13, 2006 12:34 pm

I'll go along with Johan on that one. Keep the battery voltage at 12 volts, wired in series will blow the ESC

Irish Yamato · Post by **Irish Yamato** » Tue Jun 13, 2006 12:43 pm

ehhh....anyone got a daigram of that set up?

John John

Victorious · Post by **Victorious** » Tue Jun 13, 2006 1:26 pm

John, how many speed contoller's are you using?

klein loewietje · Post by **klein loewietje** » Tue Jun 13, 2006 1:37 pm

Just made one, but wait a few seconds, try to post it

Irish Yamato · Post by **Irish Yamato** » Tue Jun 13, 2006 2:10 pm

I was hoping to use 2...one for inboard, one for outboard...

Thanks

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