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OUTBOARD MONOHULL

Old 09-12-2010, 09:09 PM
  #1  
mickieb49
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Default OUTBOARD MONOHULL

Hi all, i am curious, why isn't there much out there of actual scale monohull boats with outboard motors?

I know there has been a few avid builders out there that have dabbled on this thought, i would be for sure interested on hearing from them and seeing a few photos.

I am building a 1/6 scale version of a 1650 Bullet hull ski boat with the intention on putting a brushless outboard on it, i am just keen to hear from any othere that have done this before with any success.
Cheers
Old 09-12-2010, 09:37 PM
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HOTWATER
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Default RE: OUTBOARD MONOHULL

I took the electrics out of a Kyosho Jet Stream 800 and put a new radio box, gas tank in it and a K&B 3.5 outboard on it...it was fast! Back in the early 90's (and probably sometime before that) Lee Garcia ran outboards on his mono's...his boats ran very well!!

It would be neat to see someone put a brushless outboard on one!!
Old 09-13-2010, 12:14 AM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Yep will be cool, just seems like it was an idea rc boaters had back in the 90's, and not necessarily an ide of the 2000's ???? everyone seems hellbent on building tunnels.
I will be posting pics of my build here as it progresses.
Mick
Old 09-13-2010, 04:23 AM
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Default RE: OUTBOARD MONOHULL

Here are a few photo's of the plug, doing the mold at the moment.

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Old 09-13-2010, 04:45 AM
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Default RE: OUTBOARD MONOHULL

It really does not work well. I had an inboard many years ago I blew up, wanted to finish the season so I stuck an outboard on it. It might work better with an electric because you can shove the batteries all the way to the nose to get it to balance properly. Most of the time you end up with the CG way to far back for the boat to handle properly. The other guy was right back in the 80's people did try outboards on everything, found out they don't work that well, now it's pretty much tunnels only for outboards.
What can I say if it really worked well you would see more of them. My boat went from one of the fastest 3.5 monos in the club with the inboard to an also ran with an outboard.
For a scale play boat you might get acceptable performance, for racing it is pointless. The boat end up too heavy by the time it's balanced.
Tunnels are designed to operate with an outboard, and have you ever seen how a tunnel runs until it get air trapped under the hull and it gets up on plane? not too impressive, A tunnel is way harder to set up right than any other type of boat hull.
Been there, tried it with a nitro boat, couldn't wait to get an inboard back in it. As I say it might work better with electric because of the batteries, Mine took about a pound of lead in the nose to get it to balance, half a 1 kilo diving weight. you might need lead and the battery as far forward as you can get it.
Old 09-13-2010, 08:48 AM
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srt10
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Default RE: OUTBOARD MONOHULL

Thats the size of the hull?
this has a cool looking outboard on it
http://www.proboatmodels.com/Product...g&SubCategory=
Old 09-13-2010, 03:50 PM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Thanks guy's, as i expected, i had seen one outboard on a mono a while ago and as you said it had the cog in the wrong place.
I was trying to correct this by making the hull 860mm long , it seems a little excessive for a brushless outboard but it may also help to reduce the weight i need in the nose, i have also added a flat area near the transom going up nearly 2/3 the length of the hull to create a ride pad.
I am also going to experiment with power trim???/ I know this has also been tried in the past but it all can help.
Just wondering on where it will be best for the COG , 35% , 30% ??????
Cheers
Old 09-13-2010, 09:40 PM
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srt10
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Default RE: OUTBOARD MONOHULL


ORIGINAL: mickieb49

Thanks guy's, as i expected, i had seen one outboard on a mono a while ago and as you said it had the cog in the wrong place.
I was trying to correct this by making the hull 860mm long , it seems a little excessive for a brushless outboard but it may also help to reduce the weight i need in the nose, i have also added a flat area near the transom going up nearly 2/3 the length of the hull to create a ride pad.
I am also going to experiment with power trim???/ I know this has also been tried in the past but it all can help.
Just wondering on where it will be best for the COG , 35% , 30% ??????
Cheers
actually there are many outboard mono's out there
they work awesome, and the cg is easy to get right
30% makes for a faster boat, but it depends on the hull
Old 09-14-2010, 07:27 PM
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Default RE: OUTBOARD MONOHULL

I'd love to see a video of an outboard mono going . i finished a project a few months ago . It was a 32" HOR mono with two  EP1''s on the back . I think that they had wicked scale looks but it didn't run very fast . I have counter rotating Titan motors and a set of Octura props . I also have a project on the go with a EP1 with a brushless upgrade ......... Just bench testing it the bevel gears failed ......... I have deep rooted love of outboards real and scale and i'm happy that Pro Boat has released thier new Stiletto , i'm not a big tunnel hull fan but i'm sure the motor can be purchased separate .
Old 09-14-2010, 09:56 PM
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mickieb49
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Default RE: OUTBOARD MONOHULL

I have now finished laying up the mold, will be hopefully laying up the first hull within a few days. Will post the build here as it progresses.

EP1's hey? from my understanding that they didn't have too strong gears and will not cope with large amounts of power??? I will be using a Hyper leg, ul-1 motor on 3-4s. just pity there isn't a strong scale outboard out there.

The problem i see with the lack of outboard mono's is that no one out there seems to be building a dedicated outboard hull? correct me if i'm wrong.
Old 09-14-2010, 10:20 PM
  #11  
JCAustralia
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Default RE: OUTBOARD MONOHULL

Hi Mickie

Kehrer makes a nice outboard mono.

http://www.jet-drive.de/index.php?op...d=59&Itemid=17

I have a similar project in mind with my K&B brushless outboard. Was considering the Kehrer boat at one point in time but its above my budget[].....

Looking forward to see how your hull turn out to be. Will you be making more afterwards?

Cheers

JC
Old 09-14-2010, 10:49 PM
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Default RE: OUTBOARD MONOHULL


ORIGINAL: mickieb49

I have now finished laying up the mold, will be hopefully laying up the first hull within a few days. Will post the build here as it progresses.

EP1's hey? from my understanding that they didn't have too strong gears and will not cope with large amounts of power??? I will be using a Hyper leg, ul-1 motor on 3-4s. just pity there isn't a strong scale outboard out there.

The problem i see with the lack of outboard mono's is that no one out there seems to be building a dedicated outboard hull? correct me if i'm wrong.
well you can make most any mono an outboard hull, even cats!
I've seen a Mean Machine with twin outboards with SV power on 4s each, and it was killer
Old 09-15-2010, 12:29 AM
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mickieb49
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Default RE: OUTBOARD MONOHULL


ORIGINAL: JCAustralia

Hi Mickie

Kehrer makes a nice outboard mono.

http://www.jet-drive.de/index.php?op...d=59&Itemid=17

I have a similar project in mind with my K&B brushless outboard. Was considering the Kehrer boat at one point in time but its above my budget[].....

Looking forward to see how your hull turn out to be. Will you be making more afterwards?

Cheers

JC
I was not aware of that one, thanks for the update.

If the hulls turn out ok i may be able to do one for you, i am just waiting to see how they turn out first.
May even try another hull design if this one works out well????
Cheers Mick
Old 09-15-2010, 12:43 AM
  #14  
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Default RE: OUTBOARD MONOHULL

Great.

A while ago I saw on Ebay Australia a nice fibreglass scale hull of the Haines Hunter designed for an outboard motor. The seller was in Brisbane and said it was a one off project......

Also a mono with twin outboard would be great......

The aeromarine challenger with a high transom would also be a good candidate for an outboard. Its has a nice scale look and is based on the Apache hull. Was going to do it but changed my mind later for some reasons......



Cheers

JC

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Old 09-27-2010, 04:23 AM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Hi all , just a little update, managed to get the first hull out of the mold, should have spent more time on the polishing of the mold as the hull really didn't want to come out , but alot of persuation and out it came. Tried Latex molds first but didn't seem to want to play the game so went back to the glass molds....Man i am sick of sanding /polishing....
Hoping to have it on the water very soon, thinking on puting remote trim on it too???
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Old 10-05-2010, 03:38 AM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Hello all, well hull is painted and just starting to fit out the hull. may even see the water within the next week ????

Old 10-05-2010, 03:41 AM
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Default RE: OUTBOARD MONOHULL

Sorry the pictures didn't come up, here they are.
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Old 10-05-2010, 07:08 AM
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Default RE: OUTBOARD MONOHULL

Looking good mate.

Can't wait for the water test
Old 10-05-2010, 05:56 PM
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Default RE: OUTBOARD MONOHULL

Thanks, only have to plumb in the servo for steering then that's it, am thinking on using the third channel on the radio for trim too ? has anyone got any pictures on this setup?
Cheers Mick
Old 02-25-2011, 01:52 AM
  #20  
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Default RE: OUTBOARD MONOHULL

hi all firstly i have sent a message to mickie.

But basically i would really love to have a boat to race in limited on 4s thats powered with an outboard without doing a tunnel either a mono or cat but i have put the idea forward to my club members it basically was shot down and said its not gunna work with an inboard hull.

An the best i could do is a tunnel hull and cat cowl while that would be ok i would like to try the above option before i have to go to what everybody else has got inboard cats/vees and outboard tunnels. any help on the subject or a suitable hull to use thats not really expensive that wouldnt be a bad boat to race would be great cheers.
Old 05-25-2011, 02:04 AM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Hi , just thought i'd add a update, another hull on the way, this one is for someone else but has got me keen to revisit this idea and see if i can get it going better.
Cheers Mick
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Old 05-25-2011, 05:28 AM
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Default RE: OUTBOARD MONOHULL

Hi Mickie

How did the boat run? Any vid?

I've used my outboard for a tunnel hull. Now that I've seen the proboat outboard I want to do a semi scale project with a ski boat......

JC
Old 05-25-2011, 12:52 PM
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Default RE: OUTBOARD MONOHULL

Hi JC, boat ran well, running it with a 3200kv on 3s was about the right amount of power, first run out i may not have had the leg setup right and when it got to about 30-35mph the wind just was too much and flipped it, tamed it down a little and ran very well considering, didn't seem to have toomany bad habbits.
Unfortunately no vids, and had sold the original boat so i could get onto another build, now am going to try again and get some footage for everyone.
Mick
Old 05-26-2011, 05:24 AM
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Default RE: OUTBOARD MONOHULL

Good news

Makes me want to do an outboard mono now. Anyway got a few projects that I need to finish first before doing the OB mono....

There is a guy on Ebay that sells nice semi-scale hull perfect for that type of project. He is based in Australia.

Here are a couple of pics of my outboard.

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Old 05-26-2011, 01:48 PM
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mickieb49
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Default RE: OUTBOARD MONOHULL

Nice outboard, is that a K &B leg there ? I have only 2 Brushless outboard Tunnels and honestly i'm not a absolute fanatic but anything RC Boating is way too cool !
I have another tunnel project i'm working on at the moment , and i can honestly say you will not have seen anything like it before..... still in the molding process but i will expose it soon.

JC do you race up at Penrith? We have a small contingent running down the coast near Nowra, and will hopefully be able to race up there in the near foreseeable future.

Cheers mick

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