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Making airboat from car

Old 06-04-2011, 03:29 PM
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Crathes
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Default Making airboat from car

Hi!

I want to make my old rc car into an airboat. The engine has been stripped out and cleaned, and is ready to go.
I have not put a rotor on the engine as i have no idea how to do this. What do i do??

I have searched the forums and used google for at least an hour, but to no avail.

Thanks
Old 06-04-2011, 05:00 PM
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Mr Cajun Gator
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Default RE: Making airboat from car

what engine? do you have a picture of it?
Old 06-04-2011, 05:04 PM
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Crathes
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Default RE: Making airboat from car

Its from a 6 year old kyosho readyset porche road car. I dont have my camera here, but i can post some photos tomorrow.
Old 06-04-2011, 10:05 PM
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Default RE: Making airboat from car

That'll be a good start Crathes.   you will probably have to remove a gearbox? from the engine to get to the shaft you will need to mount the prop to.

post some pics and I'm sure the guys here will let you know what is possible.

Old 06-05-2011, 02:20 AM
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Crathes
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Default RE: Making airboat from car

Here's some pics of the engine.It looks dirty, but thats only the outside





EDIT:I had to figure out how to use the picture uploader, and i messed something up
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Old 06-06-2011, 01:13 AM
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Altered1
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Default RE: Making airboat from car

OK,

If this is possible, you should be able to take off the flywheel and the drive gear to give a bare shaft to mount the prop to.  You may need to make an adapter, and I'm not sure the shaft will be long enough.  You may also fine the engine could be on the small size, which will limit the size of the hull you can mount it to.

Has anyone else here done a car engine conversion ?

With the price of some engines today, either new or second hand, you may want to look at what is available to you - it may save you time and money in the long run to buy an aero engine to start with.  I've recently purchased a chinese engine, new, for USD $50, and I've seen some great looking second hand ones on evilbay from USD $22 plus postage.   Not exactly the answer you are looking for I know, but.....


Old 06-06-2011, 05:28 AM
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Crathes
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Default RE: Making airboat from car

Well, the whole point of this build was to be a cheap summer hobby. I bought the car from a friend for 20 USD, and the other expenses i foresaw were fuel, a glow thingy and a prop. I'll go to the local RC store to check out what i can do with the engine.And as for the hull on the boat, it wasnt going to be very large. I was thinking of maby making it a catamaran.
Old 06-07-2011, 01:26 AM
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Altered1
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Default RE: Making airboat from car

Don't give up ! 

Have a chat to the people at the hobby shop - they will hopefully have a good idea if the conversion is possible.   You could also try posting a question in the engines thread.
Old 06-07-2011, 08:01 AM
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Default RE: Making airboat from car

Is that a screw in the end - holding the gear on? if so why not get a longer screw with a toothed washer , drill out your prop to fit over the gear and screw it on there = clutched prop.
Old 06-07-2011, 09:03 AM
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Crathes
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Default RE: Making airboat from car

I'll check that out. But i think its some sort of "clamp" holding it in place.
Old 06-07-2011, 09:51 AM
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Default RE: Making airboat from car

Take that off and lets see whats under there
Old 06-07-2011, 01:03 PM
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Default RE: Making airboat from car

get a aluminum block cut some baring brackets in it and fasten that to the bottom of the motor, add a gear that will fit and mount the prop as needed. the motor was built for a hire rpm so this application will prob work well. also look on the web for a longer crank shaft, should be some sort of parts list for other applications using that motor.
Old 06-07-2011, 01:07 PM
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Crathes
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Default RE: Making airboat from car

There is actually a gear in the car already. It's fed into the differential though, so it has two "outlets" (?). Would it work if i attach the prop to one of the outlets from the differential and block the other one so all the power goes to the one with the prop?
Old 06-08-2011, 01:19 PM
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Default RE: Making airboat from car

I don't see why not but the added weight and extra gearing will rob some power, however with gearing it down so much you can put a massive prop on it.
I remembered seeing a conversion so I went looking see links below on how he did it.
http://www.rcuniverse.com/forum/m_50...2Cmotor/tm.htm
http://www.rcuniverse.com/forum/m_51...tm.htm#5104022
Old 07-08-2011, 05:03 PM
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Default RE: Making airboat from car

instead of gearing it down, just run a low pitch prop or smaller prop.  take the screw/or e clip off the end of the shaft and take the clutchbell off, then remove the clutch. there should be a nut. hld the engines shaft(there is usually a hole somewhere in the flywheel or the gripping washer behind it to hold the shaft) and remove the nut. now toy should have a bare shat coming out of the engine which you bolt the prop to.

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