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Building my first RC boat (DT project)

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Old 01-08-2014, 05:56 AM
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Jamie7
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Default Building my first RC boat (DT project)

Hi there,

I am aiming to design and build a RC nitro boat. I have already got the engine & setup from a RC nitro car (hobeo hyper 7) which I am going to work around.

I have come across a problem in which I have come here to get your help.

How do you connect the driveshalf to the propella and make it water sealed?

To make it more clear, I must make a hole within the hull for the drive shalf to exit. How do I ensure water does not get into this hole?

Cheers in advance,

Jamie.
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Old 01-08-2014, 01:38 PM
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Ron Olson
 
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It's run through a brass tube just a hair larger than the shaft or cable that you're using then filled with a waterproof grease.
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Old 01-09-2014, 08:45 AM
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Jamie7
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Quote:
Originally Posted by Ron Olson View Post
It's run through a brass tube just a hair larger than the shaft or cable that you're using then filled with a waterproof grease.
Thanks for the response, do you have a picture to make it more clear?
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Old 01-09-2014, 10:20 AM
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Ron Olson
 
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Unfortunately, no. I'm in the process of moving pictures and videos over from my old computer tower to another one but still may not have what you're looking for.
I only use flexible cables now as I'm spoiled on them. You'd be using a 3/16" cable for your engine so you'd then need a 1/4" ID piece of brass tubing for your stuffing box.
Hopefully you're going to be installing it into a low-profile deep-vee hull. That would keep the heat sinks up in the cool air and you can remove a few of the top sinks otheriwse the engine can't get up to the proper operating temperature. I've done a lot of .12 powered boats in my time but what you're doing is basically the same thing. When I started doing them there really wasn't much around for small-block nitro boats but in over the years it's gotten easier. I've found that some RC car and truck engines work better than others as it has a lot to do with the intake and exhaust timing.
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