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Author Topic: Completely new to model boats  (Read 18272 times)

essex2visuvesi

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Re: Completely new to model boats
« Reply #75 on: August 28, 2012, 12:14:29 pm »

yes indeed.... she's quick and looks a bit of a hand full
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dodgy geezer

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Re: Completely new to model boats
« Reply #76 on: August 28, 2012, 06:13:11 pm »

That tilt looks to be caused by the torque reaction from the motor rather than hull inaccuracy. Small thin boats are likely to suffer from this effect...

I suggest that you consider a trim tab - just one, on the side which goes lower - that looks like the starboard. You see complicated controllable ones on racing boats - all you would need is a single metal plate which can be bent down a bit to give counterbalancing lift at speed. Here is a site which gives a bit more data - http://boatsafe.com/nauticalknowhow/captpat1.htm
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Ogtinc

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Re: Completely new to model boats
« Reply #77 on: August 28, 2012, 08:28:59 pm »

I'm pleased for my first boat :)  the second project has already begun, picked up a fibreglass hull off ebay that came with an old motor, prop/shaft and rudder.  It's just a shame my leave ends this week and I'm back to work :(
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dodgy geezer

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Re: Completely new to model boats
« Reply #78 on: August 28, 2012, 08:58:03 pm »

You seem to have caught the bug - there's no cure, you just have to be locked away in little rooms with a knife and some balsa three times a week...   <:( <:(
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Ogtinc

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Re: Completely new to model boats
« Reply #79 on: August 28, 2012, 09:07:43 pm »

I just wish I could take the models with me on the real ships to pass some time :)
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Mad_Mike

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Re: Completely new to model boats
« Reply #80 on: August 28, 2012, 09:08:17 pm »

what do you do?
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Ogtinc

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Re: Completely new to model boats
« Reply #81 on: August 28, 2012, 09:47:33 pm »

I'm in the Royal fleet auxiliary :)
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Mad_Mike

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Re: Completely new to model boats
« Reply #82 on: August 29, 2012, 12:25:57 am »

I had to google it. Its seems natural for guys who work on boats to get into modelling them too. Dont know what my excuse is, ive been on boats but they are not part of my everyday life. I cant understand what it is I like about them, i just do.

one day you will be building a model of your own ship. It seems the thing to do when you are retired.
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Ogtinc

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Re: Completely new to model boats
« Reply #83 on: August 29, 2012, 01:00:05 am »

I can't wait to have a go at building an RFA Ship, I think the Bay Class ( http://www.royalnavy.mod.uk/The-Fleet/Royal-Fleet-Auxiliary/Bay-Class-Landing-Ships ) would be really cool to do with the stern door for amphibious landing craft.
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dodgy geezer

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Re: Completely new to model boats
« Reply #84 on: August 29, 2012, 08:24:35 am »

Quote
....the hull is not symmetrical so it leans over when planing...

Any comments on the trim-tab proposal? I don't know if you believe that your hull is not symmetrical because you can see that it's twisted, or because you can see it tilting in the water under power. If it's the latter, then I suspect that it's not the hull, and I think a trim tab is the answer...
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Ogtinc

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Re: Completely new to model boats
« Reply #85 on: August 29, 2012, 09:08:52 am »

I reckon your right it seems like a more logic explanation. It's something I'll have to look into when I'm next on leave.
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dodgy geezer

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Re: Completely new to model boats
« Reply #86 on: August 29, 2012, 10:02:48 am »

The more you overpower a boat, the greater the torque reaction. That's one reason why racing boats frequently have a wide beam. Your boat is a scale deep V, which has a narrow hull, nearer to circular in cross section. This makes it quite prone to torque reaction. If you had gone for a 500 motor things would have been worse! 

A smaller propeller will result in less torque (and a bigger one will make the boat spin in the water!) - but a trim tab is the proper way to go...
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Ogtinc

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Re: Completely new to model boats
« Reply #87 on: August 29, 2012, 10:25:20 am »

Great :)  its good to have someone around who knows what they're on about :D
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essex2visuvesi

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Re: Completely new to model boats
« Reply #88 on: August 29, 2012, 10:31:03 am »

If im to quick to hit full throttle my Huntsman it will lift out of the water almost verically... So i'm thinking that trim tabs may help here too
I cant move the batteries any further forward
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LarryW

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Re: Completely new to model boats
« Reply #89 on: August 29, 2012, 11:34:10 am »

hELLO,
        Nice build for your first model ,    if you need to build anther sp0rt model with a good performance have look at a SWORDSMAN  featured on this site
          do have a picture of the stuff you bought on flea bay,  and do have a plan of RFA SHIP , ?.. I am building a stand of scale model of HMS  ILLUSTRIOUS , 





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Ogtinc

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Re: Completely new to model boats
« Reply #90 on: August 29, 2012, 11:51:42 am »

Yer I started a thread yesterday with a couple of phots on of the hull and motor link here: http://www.modelboatmayhem.co.uk/forum/index.php?topic=39192.0

I don't have any RFA Ship plans no, but if I can get hold of any I'll let you guys know :)
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dodgy geezer

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Re: Completely new to model boats
« Reply #91 on: August 29, 2012, 02:33:09 pm »

Great :)  its good to have someone around who knows what they're on about :D

If you know of someone, maybe you could introduce him to me...    :D
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