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new 44 inch mono questions - 6/26/2008 12:04:31 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		Ok i just won a 44*12 inch fiberglass mono hull for $21. I really need to keep this project low cost, so will this boat take a strimmer engine?
If not i am pretty stuffed.
Thanks
Alex

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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat
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RE: new 44 inch mono questions - 6/26/2008 1:05:10 PM   
GRANT ED



Posts: 2580
Joined: 4/13/2003
From: Adelaide, AUSTRALIA
Status: offline 		Pics would help a lot.

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RE: new 44 inch mono questions - 6/26/2008 1:55:39 PM   
jdoug


 

Posts: 1284
Joined: 1/18/2005
From: Nampa, ID, USA
Status: offline 		I've put a 25cc Homelite in a scratch built Vee that was 42 in. X 11.5 in. It was tight, but everything fit.

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RE: new 44 inch mono questions - 6/26/2008 1:57:04 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		Here are some pics.
Thanks

Attachments
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Click for fullsize 		Click to see fullsize image.
Click for fullsize


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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat

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RE: new 44 inch mono questions - 6/26/2008 1:58:17 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		thanks jdoug. I keep starting the same sort of projects as you, lol.

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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat

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RE: new 44 inch mono questions - 6/26/2008 6:17:57 PM   
jdoug


 

Posts: 1284
Joined: 1/18/2005
From: Nampa, ID, USA
Status: offline 		Do you plan on leaving it sub drive? It does look to me like it would take a trimmer engine. Does it have 5" rails for mounting the engine?

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RE: new 44 inch mono questions - 6/26/2008 6:34:17 PM   
roger84


 

Posts: 5
Joined: 8/30/2007
From: lexington, KY, USA
Status: offline 		If it were up to me I would rework the drive. It looks like it has very tight radius curves. I would straighten it out a bit and move the prop back some. This would also give you some more room for the engine. But that’s just my $0.02

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RE: new 44 inch mono questions - 6/26/2008 6:35:21 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		I am so against staying subdrive. But i think it will cost a lot to make it surfacedrive. Also unsure on how to set up surfacedrive for a boat like this.
I am not sure if it has rails, my dad is picking it up on Tuesday. I then won't see it until next weekend. .

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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat

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RE: new 44 inch mono questions - 6/26/2008 7:20:31 PM   
jdoug


 

Posts: 1284
Joined: 1/18/2005
From: Nampa, ID, USA
Status: offline 		You could make your own stinger or strut and rudder pretty easily. On a mono of this size, you are going to want the prop about 4-5 in. back from the transom. Set the height to where one blade of the prop is below the water line, everything else including the prop hub would be above the water.

As far as rails go, set them to be 5 in. apart and make them run from the transom on up past the engine. You can mount the fuel tank to these as well. The rails will add strength the hull too which is why you want them to run up a ways past the engine. On my AC hull the rails go up to about 6 in. from the nose. Most will say use 1/4" aircraft birch ply for this. The AC hull uses 1/8 ply with another 1/16" of glass, so total is about 3/16". You couldn't rip the rails out of the hull if you wanted to.

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RE: new 44 inch mono questions - 6/26/2008 7:33:38 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		thanks for all that jdoug.
I will make it surfacedrive then. You have forced me into it, lol.
I can't wait to take a look at this. I live with the sea at the bottom of my garden and it is often rough, so was looking for a big boat to handle it.
When i saw this hull i had to get it for the price.

What about rudder length?
i was looking on here and it seems to be around 2-3 inch below lowest point, is this about right?
Thanks again for all the help

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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat

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RE: new 44 inch mono questions - 6/26/2008 9:52:36 PM   
jdoug


 

Posts: 1284
Joined: 1/18/2005
From: Nampa, ID, USA
Status: offline 		The rudder...I had the same question when I was building mine. I'll take a look at mine tonight, but if memory serves me correct, it is about 1.5 - 2 in. below the keel. My Homelite boat had the rudder inline with prop and it didn't steer well at high speed, but really well at an idle. I switched it over to the right and without changing the depth, it was a lot better turning both ways. I think with an inline rudder, it needs to be run quite deep to reach water that isn't chewed up by the prop so to speak. When run to the right, is in clean water and turns better because of it. It also picks up water better too.

You have to remember that a rudder offset to the right will just about come out of the water when turning left. I put turn fins left and right so the boat won't hop sideways, pick the rudder up, and unexpectedly swap ends when turning.

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RE: new 44 inch mono questions - 6/26/2008 10:28:00 PM   
Alex73



Posts: 601
Joined: 5/24/2006
From: Clacton-On-Sea Essex, UNITED KINGDOM
Status: offline 		where do i need to put the engine in the boat?
as i was looking at flex shaft and not sure if i need 18,25 or 30 inch.

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Models: Xray M18t pro (mamba), Losi Mini-t, Hurricane XP 1/8 buggy, Brushless Scat Cat 21, TC4, 43" Gas Mono, Eco boat

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RE: new 44 inch mono questions - 6/26/2008 10:32:28 PM   
martno1fan



Posts: 7428
Joined: 1/20/2005
From: blackpool, UNITED KINGDOM
Status: offline 		Alex surface drive is the way to go for sure also make your rudder 6" and keep it 2" bellow the prop and you will be fine mate,left turns are ok on mine but you must offset the drive 1/4" to right of keel line this overcomes prop walk or veering to the right which it will do if you run it dead centre.My first boat has a weedy motor ,its a scratch built woody,you can buy very reasonable hardware from our friends in the states too,checkout zippkits its good gear at great prices.Strut and offset rudder for £32 is dam good and postage is good too and Joe is a great guy to deal with.If you want nearer then try Dave Marles.
Mart
http://www.zippkits.com/


http://www.prestwich.ndirect.co.uk/

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RE: new 44 inch mono questions - 6/26/2008 10:36:05 PM   
martno1fan



Posts: 7428
Joined: 1/20/2005
From: blackpool, UNITED KINGDOM
Status: offline
quote:

ORIGINAL: Alex73

where do i need to put the engine in the boat?
as i was looking at flex shaft and not sure if i need 18,25 or 30 inch.

Motor is last thing you mount first buy your hardware and radio box gear etc sit it in the hull along with the motor and balance the hull at 28-30% from transom on a broom shaft then move motor till she balances then mark for mounting.First thing to mount is the strut and rudder then balance her as said above.Looking at your pics you have no engine rails in the hull? if not you will need to install some1/4" marine or birch ply rails using fibreglass.
Mart

http://www.americanrcboats.com/howto/buildguide/buildguide.htm

< Message edited by martno1fan -- 6/26/2008 10:39:00 PM >

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im not argumentative im just missunderstood

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RE: new 44 inch mono questions - 6/26/2008 10:44:42 PM