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Author Topic: Speedline's 1\12th Tamar  (Read 5856 times)

justboatonic

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Speedline's 1\12th Tamar
« on: October 24, 2009, 05:44:37 PM »

Looks a very impressive model. And at 52" length, its quite a size!

Does anyone have an idea how much a fully built model of this Tamar would weigh? There's no indication on Speedline's site of the total weight but MSW's 1\16th version is said to be 7.5Kg or approx 18lbs.. Given the Speedline model has 5 grp moulding and uses perspex for the superstructure instead of plasticard (although I think I read somewhere on Adrian's site there is now some plasticard used), is it wise to assume this would add considerably to the weight?

Also, in view of the size, I'd expect it would not be a model you could just lift singlehandedly into the water without back strain! Any ideas for launching such a beast? I love large scale and this deffo one model I'd be looking to build after the MSW Envoy tug currently on the stocks!

Finally, what power source and motors would be suitable? I found the YouTube vid that shows the test model running and it was sure fast (the youtube link on Adrian's site didnt work). Looks like an ideal model for lipo cells although Would any 'quality' brushless of suitable size be ok?

Cheers.
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DOBKMCM

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Re: Speedline's 1\12th Tamar
« Reply #1 on: October 24, 2009, 06:06:11 PM »

 :}

Hi
Yes it does look impressive

It might be worth your while to have a look at Phils web site

www.phlsrcmodels.co.uk     as he is doing a build of one

Hope this in someway helps

Mike
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6705russell

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Re: Speedline's 1\12th Tamar
« Reply #2 on: October 24, 2009, 06:13:51 PM »

I have just made a start on the Tamar and i would imagine when finished it would weigh around the 10-11kg mark... this one is having brushless fitted.

Russ
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Roger in France

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Re: Speedline's 1\12th Tamar
« Reply #3 on: October 24, 2009, 06:15:32 PM »

She sure looks impressive "in the raw" and from Adrian's site, superb when finished.

Please keep us updated on the builds, chaps.

Roger in France
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justboatonic

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Re: Speedline's 1\12th Tamar
« Reply #4 on: October 24, 2009, 06:38:23 PM »

I have just made a start on the Tamar and i would imagine when finished it would weigh around the 10-11kg mark... this one is having brushless fitted.

Russ

Sure looks impressive, Russ. Have you decided which Tamar its being modelled on? What brushless motors and speed controllers are you intending using? Are there any mixers available for brushless on the market?

Keep them pictures coming, mate!  :-))
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HS93 (RIP)

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Re: Speedline's 1\12th Tamar
« Reply #5 on: October 24, 2009, 06:44:14 PM »

any mixer will work with brushless.

peter
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justboatonic

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Re: Speedline's 1\12th Tamar
« Reply #6 on: October 24, 2009, 06:55:27 PM »

any mixer will work with brushless.

peter

What, esc mixers like ACTion's which will slow the inside motor?
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HS93 (RIP)

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Re: Speedline's 1\12th Tamar
« Reply #7 on: October 24, 2009, 07:10:18 PM »

you can buy a stand alone mixer and any speed controller brushed or brushless there are several mixers on the market . the mixer just plugs in between the two speed controllers and the rudder servo and "mixes" them.

Peter
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justboatonic

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Re: Speedline's 1\12th Tamar
« Reply #8 on: October 24, 2009, 07:20:36 PM »

you can buy a stand alone mixer and any speed controller brushed or brushless there are several mixers on the market . the mixer just plugs in between the two speed controllers and the rudder servo and "mixes" them.

Peter

OK thanks for that info!
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johno 52-11

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Re: Speedline's 1\12th Tamar
« Reply #9 on: October 24, 2009, 07:33:06 PM »

the finished weight of a 1/12 Tamar should be around 17Kg. A 1/12 Severn comes out at around 24kg for real boat weighing 40 tons so divide 24 by 4 and times by 3 and you get 18Kg for a 30 ton real boat.

You can also divide the real weight by the cube of the scale e.g. 30000 / 1728 = 17.36 just as 40000 / 1728 = 23.18.
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6705russell

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Re: Speedline's 1\12th Tamar
« Reply #10 on: October 24, 2009, 09:08:21 PM »

So take the weight of the engines away and it should weigh around 11kg... %%

Russ
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debssnal

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Re: Speedline's 1\12th Tamar
« Reply #11 on: October 25, 2009, 01:59:19 AM »

I have just made a start on the Tamar and i would imagine when finished it would weigh around the 10-11kg mark... this one is having brushless fitted.

Russ
Hi Russ,so what brushless motors you puting in?????
kind regards
Alan
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6705russell

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Re: Speedline's 1\12th Tamar
« Reply #12 on: October 25, 2009, 11:14:55 AM »

I was going to go with the Tornado Thumpers, 1200w each....

Russ
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justboatonic

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Re: Speedline's 1\12th Tamar
« Reply #13 on: October 26, 2009, 06:32:40 PM »

I was going to go with the Tornado Thumpers, 1200w each....

Russ

Hi Russ.

Is that rating for the brushless motors as recommended by Speedline? One project I have on the go is building a 1\6th )approx) scale Piper Cub that weighs about 7.5lbs and there's a formula we use for leccie planes. Basically its 70 - 100 watts of motor power for each pound the plane weighs.

Then you have to take into account the size of the prop on the motor so the lipo batteries dont overheat when being used. I'd need to dig that stuff out again but I think its recommended that the brushless motor \ prop combination dont discharge the lipos at more than 20c - 25c where c = the charge rate

Just wondering if there's something similar for boats and you've worked out the boat's weight prop sizes etc or you're going with best estimate.
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rg197r27

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Re: Speedline's 1\12th Tamar
« Reply #14 on: December 31, 2009, 05:40:39 PM »

most people are fitting emax bl4030's ourunners i am sure phil is in his

rich
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DaveB

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Re: Speedline's 1\12th Tamar
« Reply #15 on: December 31, 2009, 07:17:57 PM »

My mate Stan has made a start on his, motors and running gear are all installed we fitted the Tornado thumpers the same as Russ's with 60amp seaking esc's, water cooled using a windscreen washer pump controlled by a forwaed only esc from Action at the moment running on 12volts as Stan would have a bit of trouble on our small pond on 24volts, the boat is huge but plenty of room to work.
Dave
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