drive shaft sealing proplems

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deanus - 07 Apr 2008 13:29 GMT

i have a home made rc boat which leaks quite a bit through the drive
sahft hole in the back of the hull . i use a quarter inch shaft with
copper pipe with the same diameter as the drive shaft but ther is alot
of water leaking in. any ideas how to stop it ? bearings?

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deanus

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John Mianowski - 07 Apr 2008 17:20 GMT

On Apr 7, 7:29 am, deanus <deanus.37h...@no-
mx.forums.yourdomain.com.au> wrote:

> i have a home made rc boat which leaks quite a bit through the drive
> sahft hole in the back of the hull . i use a quarter inch shaft with
[quoted text clipped - 6 lines]
> deanus's Profile:http://www.modelpowerboat.com/forum/member.php?userid=3817
> View this thread:http://www.modelpowerboat.com/forum/showthread.php?t=591

Search for "stuffing tube" or "stuffing box".

JM

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John - 08 Apr 2008 04:48 GMT

I assume you must have a clutch or run an electric boat where you stop
in the water? How much water are we talking about?

Have a look at the attached photo of my Son's boat. You will notice
there is a hole in the transom in front of the stinger drive. Now,
this is a race boat, so the only reason this boat would stop in the
water is due to stalling or flipping.

When the boat is moving, any water in the hull drains out through the
hole from the forward momentum of the boat.

When the boat comes to a stop the hull will fill and the boat will sit
low in the water (it has internal floatation so it will not sink). If
another boat hits it while it is stopped then normally they would skip
over top instead of smashing through the side.

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deestingray - 09 Apr 2008 00:25 GMT

Some of the different types of shaft grease you can buy will do the job
of sealing a shaft.
If you are still getting a lot of water in, there are a couple of
things that you can do to minimise splashing.
One method is to place absorbent sponge rubber on you hull floor, it
catches the water that is sloshing around getting everything wet.
Another method is to remove the water that is getting in as quick as
possible, John has shown how is done on a race boat, however if you are
at rest in the water a bit and you are getting water in, you can buy an
auto bailer which will remove the water from your boat as soon as you
get underway.
http://www.offshoreelectrics.com/proddetail.php?prod=oct-oc9204

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Model Forum / Radio Controlled / Water Models / April 2008

drive shaft sealing proplems