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Old 12 November 2009, 05:13   #1
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Retrofit elephant trunks?

I have a problem with my bung, allow me to explain. Had my first "stuff" the other day and totally swamped the rib, had to lean right over the transom and undo the bung, not ideal and very awkard.

If you undo the bung to start with, as soon as you stop for any amount of time the rib will take on water to the extent of wet feet.

Ideas on a postcard to??
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Old 12 November 2009, 05:37   #2
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is that your only means of removing the water from your boat while at sea
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Old 12 November 2009, 06:44   #3
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i would say an elephants trunk is a must for any rib. a 2cm hole in the back of the boat is not enough!
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Old 12 November 2009, 07:28   #4
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Originally Posted by mark_j View Post

Ideas on a postcard to??
I would suggest posting a shot of the inside of the transom as it is the internal lay out that will dictate how and where you are going to be abel to to drill a 4" hole
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Old 12 November 2009, 08:27   #5
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Mark,

Firstly, welcome to ribnet!

Two things - Firstly yes, a trunk will empy the boat a LOT quickwer than that wee hole. Secondly, is that bung in your photo attatched to the inside of the hull, or the cavilty under the floor? It looks a little too low to be a hull drain.......

As for the trunks, there are plenty of people will sell you a ready to fit trunk. (I got a pair of them form Humber to replace my knackered ones for (I think) about £40. No idea what your internal layout of the boat is, but leading the release string forward to the console is also a useful mod....

In the meantime, I suggest you pack a bucket. (seriously - I swamped my old SR4 "sans trunks", and was sooooo glad I had one with me!)
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Old 12 November 2009, 08:59   #6
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more info

Yes that is the only drain at present, i will take pics of the inside layout but at the back of the boat is a built in bucket for want of a better word, the bottom of that is the other side of the bung. so yest you can cut a larger hole than is there at present.
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Old 12 November 2009, 09:53   #7
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Originally Posted by mark_j View Post
Yes that is the only drain at present, i will take pics of the inside layout but at the back of the boat is a built in bucket for want of a better word, the bottom of that is the other side of the bung. so yest you can cut a larger hole than is there at present.
I think you're describing a "well" - a cavity at the transom that collects water and keeps the deck dry - usually equpped with an electric pump discharging though a hole in the transom. If you're likely to be stuffing the boat, you need more drainage than a well/pump can provide - so elephant's trunk(s).

Quote:
If you undo the bung to start with, as soon as you stop for any amount of time the rib will take on water to the extent of wet feet.
Yes it would. The bung on the outside of the transom (in your photo) is for draining the under-deck cavity when the boat is on land. It's not designed to drain water when you're afloat and I'm surprised it managed to get rid of any, even underway.
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Old 12 November 2009, 10:17   #8
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I installed a 68mm trunk into my Valiant which I purchased from the rib shop. I filled the original 50mm ope (which had a 25-30mm one way valve which was Sh*te). I then drilled out the 70mm hole with the drill bit centered on the filler which I placed in the original ope. The trunk is much better than the one way valve.
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Old 12 November 2009, 10:22   #9
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Yes a "well" is exactly what i have and the bung is quite blatently not big enough. So we have established that i do need an elephants trunk, next question is where and how to fit it?
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Old 12 November 2009, 10:52   #10
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http://www.rib-shop.com/product.asp?...hFor=&PT_ID=23
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