Transom Tube End Cones

Sonar · 13 March 2010, 08:58

Transom Tube End Cones..

Any forum members ever thought of having these.

or even have some fitted.?

Are there any advantages or disadvantages in having a set of grp cones fitted.

I was thinking they may look o.k. with a hard nosed rib.

chewy · 13 March 2010, 09:01

Quote:

Originally Posted by Sonar

Transom Tube End Cones..

Any forum members ever thought of having these.

or even have some fitted.?

Are there any advantages or disadvantages in having a set of grp cones fitted.

I was thinking they may look o.k. with a hard nosed rib.

You mean having a hard stern either side of the transom instead of tubes?

Sonar · 13 March 2010, 14:26

Quote:

Originally Posted by chewy

You mean having a hard stern either side of the transom instead of tubes?

Just the ends of the rear tubes

chewy · 13 March 2010, 18:16

So from the transom back the tube would be solid?

If the above is right I wouldn't fancy launching it off any decent size waves, the forces on the "hard tubes" would be quite alot.

Sonar · 13 March 2010, 18:34

Quote:

Originally Posted by chewy

So from the transom back the tube would be solid?

If the above is right I wouldn't fancy launching it off any decent size waves, the forces on the "hard tubes" would be quite alot.

Just the last foot or so as a tube narrows at the end

Poly · 13 March 2010, 18:41

Quote:

Originally Posted by chewy

So from the transom back the tube would be solid?

If the above is right I wouldn't fancy launching it off any decent size waves, the forces on the "hard tubes" would be quite alot.

Sonar · 13 March 2010, 18:52

Quote:

Originally Posted by Sonar

Just the last foot or so as a tube narrows at the end

http://www.dockitjet.com/

see pictures 3 and 4

willk · 13 March 2010, 19:30

Quote:

Originally Posted by Sonar

see pictures 3 and 4

eew! That kinda pervy carry-on is banned in several southern States

chewy · 13 March 2010, 19:31

Wouldn't fancy it myself, you might as well have solid tubes all the way round as by the looks of it you'll only have a little bit in the middle.

Sonar · 13 March 2010, 20:08

Quote:

Originally Posted by chewy

Wouldn't fancy it myself, you might as well have solid tubes all the way round as by the looks of it you'll only have a little bit in the middle.

It's just the last foot that is solid.

chewy · 13 March 2010, 20:10

How much is aft of the transom?

Sonar · 13 March 2010, 20:19

Quote:

Originally Posted by chewy

How much is aft of the transom?

the last 1 foot of the tube itself.
the cone area of the tube.
instead of a conical shaped tube it could be an end cap made in grp.
the tube with a flat sealed end would go into the cone by approx a foot and them be inflated and tape glued into position.

doralmark · 13 March 2010, 20:39

why

chewy · 13 March 2010, 20:52

Quote:

Originally Posted by Sonar

the last 1 foot of the tube itself.
the cone area of the tube.

So you'll have a hypalon tube next to the transom then a lump of GRP hanging off the end?

Sonar · 13 March 2010, 20:54

Quote:

Originally Posted by chewy

So you'll have a hypalon tube next to the transom then a lump of GRP hanging off the end?

it does not sound so good said that way so i guess that's a no no idea then..

Poly · 13 March 2010, 20:55

Quote:

Originally Posted by chewy

Wouldn't fancy it myself, you might as well have solid tubes all the way round

A fine idea

Sonar · 13 March 2010, 20:58

Quote:

Originally Posted by Polwart

A fine idea

Well it was just a thought seen them and asked if there a good idea or not.

NOT is the word.

chewy · 13 March 2010, 21:18

I think even if the "GRP tube" section was well supported and did go past the transom I wouldn't fancy the chances of it taking a knock. The tube would give then hit the GRP bit and could break.

Bigmuz7 · 13 March 2010, 21:50

Quote:

Originally Posted by Polwart

A fine idea

Polwart has clearly been on the brandy again

Quote:

Originally Posted by Sonar

Well it was just a thought seen them and asked if there a good idea or not.

NOT is the word.

No indeed ... dont be silly.. If i've ever been grateful for a bit of spongyness on my Ribs, its always been at the bow and the stern

Poly · 13 March 2010, 22:29

Quote:

Originally Posted by Bigmuz7

Polwart has clearly been on the brandy again

unfortunately not!

However I have rigid 'tubes' all the way round on mine. Now that might be a structurally much stonger suggestion than having the ends hard with soft bits in the middle. I would say if you are going to have rigid bits then use it to your advantage in some way. There are Rigid tubed boats which are rigid because that way they don't get punctured / damaged so much in the sun etc. That's probably less of an issue in the home rib market, compared to the costs (and risk of neglect) in the commercial market. But my solid tubes offer a number of advantages (1) the inboard side is shaped to provide a seat all the way round which is "in" rather than "on" the boat (2) the bow has a built in anchor locker/seat which provides valuable storage often missing on boats my size (3) the aft 'tube ends' are shaped to provide a step for getting in / out from the water easier. (4) in addition the PE tubes have built in space for rollocks, clips to store oars and lifeline supports - all of which would add considerable cost getting professionally fitted to tubes - but were engineered into the mould.

Now I'm not trying to advocate "all round hard tubes" as the holy grail in rib design BUT its certainly not as 'bizzare' are Chewy might have suggested and actually might have some plus points.

As for the OP's question Brig have small hard sections (probably hard plastic rahter than GRP?) with steps in them on some/all of their ribs - so not as daft as being implied.

I don't want to criticise your 'hard nose' either Sonar - but again I would be looking to do something in terms of shape/utility that isn't possible in hypalon. IIRC some of the redbay range come with quite a "pointy" hard nose (presumably better for punching through the sea) whilst others come with a fuller nose which is "open to the cabin" on the inside so giving much more volume in the forecabin.