Topic: 1/12 Arun Build (Read 21062 times)

morgsy · « **on:** June 18, 2011, 12:45:33 pm »

I first posted in the beginners section and had an excellent welcome, so i though i better post in a more appropriate section for my build thread.

http://www.modelboatmayhem.co.UK/forum/index.php?topic=30704.0

I have now ruffly fitted the RC gear into the boat and had a couple of test runs, http://www.youtube.com/watch?v=Ow04f5AMoZU
but one of the couplings broke yesterday and I noticed last night that the other coupling has a little damage, there is now a bit of play in the center of the universal coupling, does anyone have a stronger alternative than the red plastic ones? I know metal ones exist but have yet to find a supplier.

I am running on 2 12v 8ah motorbike batteries with xyh4250-800kv-outrunners and seaking 60A speed controllers.
The speed controllers are a pain in the backside as i have had to program every time i use them! also the reverse is a nightmare to get on my left motor due to the controller setup.

I will post some pics of its first decent 10min run.

Chris

morgsy · « **Reply #1 on:** June 18, 2011, 12:49:13 pm »

morgsy · « **Reply #2 on:** June 18, 2011, 12:53:13 pm »

david j · « **Reply #3 on:** June 18, 2011, 01:16:58 pm »

hi, try modelboatbits they are on ebay or direct to www. modelboatbits hope this helps

davidj

Number 6 · « **Reply #4 on:** June 18, 2011, 01:33:16 pm »

Looking good, have a look at these couplings, may be of some use to you, Dave.

http://www.cornwallmodelboats.co.uk/acatalog/couplings.html

6705russell · « **Reply #5 on:** June 18, 2011, 01:37:14 pm »

For this kind of torque you really need either solid couplings or the heavy duty flexible from Mobile Marine Models....

Russ

Number 6 · « **Reply #6 on:** June 18, 2011, 03:06:13 pm »

Forgot about the Mobile Marine ones, here's a link to them too, Dave.

http://www.mobilemarinemodels.com/acatalog/Safety_Couplings.html

morgsy · « **Reply #7 on:** June 18, 2011, 05:09:38 pm »

Thanks guys, which size do you think i require from
http://www.mobilemarinemodels.com/acatalog/Safety_Couplings.html

I am guessing standard....

I found a spare coupling from another model, so going for another run tonight, will get the mrs to get a few decent snaps.

Kind Regards,
Chris

stoney · « **Reply #8 on:** June 18, 2011, 05:15:20 pm »

I've used the heavy duty flexible couplings from MMM in my 10th scale Trent very good handles the torque

Paul

morgsy · « **Reply #9 on:** June 19, 2011, 08:29:04 am »

Thanks for the input Paul,

Does anyone have any internal pics of there Aruns/Severn/Trent, my internals are just botched together at the moment and i want to make it tidy and properly before i start with fittings etc...

I currently place 1 battery between the prop shafts and 1 just forward of the center of the boat, can anyone suggest a decent mount point?

CJ1 · « **Reply #10 on:** June 19, 2011, 09:14:01 am »

This is how I've done my 1/12 Tamar. The batteries are in trays at the sides to help slow down "roll" of the hull when sailing and it means they can be slid fore and aft for trim. I've used rc helicopter velcro tape to hold them down.
There is a servo cutout (but no servo yet) above the stbd. motor which will be used for the transom door opening. The one above the port motor is for the rudders.
There is a separate battery at the front for the bow thruster.

Chris

morgsy · « **Reply #11 on:** June 19, 2011, 10:49:54 am »

Thanks Chris,
What batteries are you using as i am currently on Motorbike batteries that weigh quite a bit, is that not going to be too much weight in the center? Or is that the best way to balance the boat, in my trials the roll is quite good at the moment, any chance of a pic of your setup?

Cheers,
Chris

CJ1 · « **Reply #12 on:** June 19, 2011, 05:00:20 pm »

I am using a pair of Graupner 12V 7aH batteries, one for each motor, Graupner Speed 900s. They are quite heavy, but the boat is still nowhere near it's waterline yet. All electrics were from A Model World. I'm not after speed, so I have tried to keep it basic and simple.

I had read that by spreading the weight laterally, ie sideways, in the boat, there is less tendency for the boat to bob about in the water.....now there's a can of worms!

Chris

stoney · « **Reply #13 on:** June 19, 2011, 11:14:14 pm »

Hi Chris

a couple of pics of my Trent set up the motors are 50 55 brushless outrunners , speed controllers are Turigy 180amp with reverse and I am using 4 cell 6ah lipo's
one for each motor . Also I am using a 3 cell 2.2ah lipo for receiver and for running the sound system and cooling water pump a 12v 3.3ah gell cell

Paul

morgsy · « **Reply #14 on:** June 21, 2011, 01:43:50 pm »

What sort of run times do you get Chris/Paul?

CJ1 · « **Reply #15 on:** June 21, 2011, 01:47:25 pm »

I have only done trial runs so far, but had half an hour non stop pottering around a lake so far with the Graupners.

Chris

stoney · « **Reply #16 on:** June 21, 2011, 05:10:15 pm »

Hi Chris

I get about 20 mins running at scale speed which is'nt to bad considering the boat weighs 56lbs

Paul

morgsy · « **Reply #17 on:** July 10, 2011, 01:46:03 pm »

my boat is now around 30kg as i have 2 sets of batteries, on the plus side i am now getting a good 30 min fast running and i wreckon an hour pottering about with a few quick runs.

I think its time to start the detailing!
Step 1 stanchions i think..

morgsy · « **Reply #18 on:** July 29, 2011, 07:07:49 am »

Good morning,
Build update....Textured deck was done last night, BnQ do textured spray paint for ornaments (and now lifeboats

looks brilliant, I am made up with the finish so far, I will give the deck another 'grey' spray tonight then I am ready to start gluing on all my bollards etc, no sign of stancions though! I have contacted adrian from Speedline and he can provide them at £2.50 each and there are about 30! 35 if count the back and sides! Ouch on the wallet, think that will be for next pay day!

Got myself a dremel 300 also so let the cutting and sanding begin!

Running update, I have had the boat running for about 1.5 hours, just pottering with the club at the 3 sisters. Very pleased with run times.

typhoon · « **Reply #19 on:** July 29, 2011, 08:05:12 am »

model slipway do 1/12 stantions at 40p each. have a look at there web site at lifeboat fittings. not used em meself but look ok and a cheaper option.

fatcat123 · « **Reply #20 on:** July 29, 2011, 09:28:54 am »

speedline do nice brass stanchions. i got some for the trent.

morgsy · « **Reply #21 on:** July 29, 2011, 01:22:50 pm »

I am struggling to find a model slipway website? Are they still available?

gribeauval · « **Reply #22 on:** July 29, 2011, 02:28:56 pm »

Link to Model Slipway site: http://www.modelslipway.com/

Link to 1/12th scale lifeboat fittings: http://www.modelslipway.com/fittings/Lifeboat_fittings/lifeboat_fittingslist.htm

Mike

morgsy · « **Reply #23 on:** July 31, 2011, 07:49:53 am »

Thanks Mike..

morgsy · « **Reply #24 on:** August 02, 2011, 11:48:40 pm »

Thought I would post some pics of the progress...

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Author Topic: 1/12 Arun Build (Read 21062 times)

david j

CJ1

CJ1

CJ1

typhoon

fatcat123