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micro airboat.

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Old 03-21-2011, 01:46 PM
  #1
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Default micro airboat.

hi. i built this little micro airboat for running around my pool (full of leaves and stuff lol). made of foam and balsa. it uses micro t electronics and a homemade prop (aluminum sheeting bent to shape.) it goes ok, but not much speed. the first design had a narrow prop. i kept cutting it down and it seemed to blow more air when it was smaller. then i make this prop which has big fat blades. it goes alot better. despite the big prop, the motor seems to get pretty good rpms. im thinking i might make a bigger prop? what do you guys recommend for the prop shape and size?

hers some pix of the boat.
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Old 03-23-2011, 09:46 PM
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Default RE: micro airboat.

Hehehe...that's pretty cool. First airboat?

There might be some electric motor props that might fit the bill. The smallest I see at Tower hobbies is 4".

Do you have any video?
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Old 03-23-2011, 09:49 PM
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Default RE: micro airboat.

By the looks of it, you could cut this one down to make it work. It has a really small hole into which the small shaft of a motor is "friction fit"
http://www3.towerhobbies.com/cgi-bin...?&I=LXYLJ1&P=Z
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Old 03-24-2011, 08:11 AM
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Default RE: micro airboat.

yea, my first airboat. from looking at pix of real rc airboats it seems like the hull should be more square shaped instead of rectangle. i think mu main problem is weight distribution and thye hull( it seems to drag in the water alot.) the prop seems to bow plenty of air, but maybe it is the problem.
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Old 03-24-2011, 03:16 PM
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Default RE: micro airboat.

im going to make a real balsawood hull for it soon hopefully. any recommendations for CG, length, width ect?  should i add a gear drive on the motor to run a bigger prop?
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Old 03-24-2011, 08:29 PM
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Default RE: micro airboat.

The first thing to do is find a prop that will work efficiently with that motor and build the hull according to that. Find the prop and let us know what it is, and we can make recommendations then.
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Old 03-25-2011, 08:42 AM
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Default RE: micro airboat.

i think a 4" prop is to big. i switched the motor for a bigger one that is alot more powerful and actually gets better run times with. it gained a little more speed. a few more mph and it should reach planing speed.
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Old 03-25-2011, 10:59 AM
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Default RE: micro airboat.

built a new prop and got it to plane! the prop is very low aspect ratio paddles. i think if i got a 7.2v pack this think would scoot pretty good.
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Old 04-05-2011, 11:28 AM
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Default RE: micro airboat.

been buildin a balsa hull. this one will accept a 4" prop. need to figure out a motor mount setup. anyone have ideas on a motor mount that can be removed and replaced for different motors?
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Old 05-03-2011, 12:32 PM
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Default RE: micro airboat.

Here is my latest airboat - the foam micro copter/boat. After some tweaking this thing is AWESOME -wood floors, carpet, water...AWESOME
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Old 05-04-2011, 06:59 AM
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Default RE: micro airboat.

How do you steer it dadkins?
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Old 05-04-2011, 07:59 AM
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Default RE: micro airboat.

I have rebuilt it since the first pics and with twin engines - I pulled all the guts out of the micro copter and used the 2 main drive motors for my power and used the tail rotor blades for props. No Idea if it would steer - BUT IT DOES - somehow the radio mixes and cuts out one of the motors slightly -almost... a miracle. This may be the easiest to set up airboat I have ever built. for some reason it just works ! best on hardwood or smooth concrete - doesnt have quite enough float to get on top of the water. -nice thing is, the hull took about 10 minutes to fabricate - and really doesnt take much foam.
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Old 05-04-2011, 08:39 PM
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Default RE: micro airboat.

Did you have to reverse the polarity on one of the motors? Does the circuit board have a gyro? Remember mine? http://www.rcuniverse.com/forum/m_10342805/tm.htm
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Old 05-05-2011, 05:58 AM
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Default RE: micro airboat.

Yes I did have to reverse one of the motors - STILL amazed that that was all the electronic modifying I had to do to make it work.
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Old 05-05-2011, 06:09 AM
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Default RE: micro airboat.

Not sure if it has a gyro or not - the helicopter USED to be amazingly stable and easy to fly.
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Old 01-16-2016, 10:04 PM
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Old 01-18-2016, 03:56 AM
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Welcome. If you are going to have identical posts in multiple threads (considered poor form) the least you could do is have the pictures upright! Cool looking boat.



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Old 01-18-2016, 09:34 PM
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Replying off a phone.. Sorry
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