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Post by naughtyfox on Apr 26, 2019 18:14:58 GMT
Yes, but should the rudder stock tube be painted (bitumened) inside? So far, no-one here on TB has answered whether they've done theirs or not. They are all thinking they should have done it... and... like us.. worried that soon they will be leaving a trail of diesel all down the Trent & Mersey / southern Oxford. I wish I could go back in time 33 years and see our boat being built. If your boat is 33 years old and that tube is the original, then it's already well into the 'borrowed time' phase of it's reasonable life expectancy. Well, thanks, Tony, you have cheered me up no end. |
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Post by metanoia on Apr 26, 2019 18:18:36 GMT
 " Quiet minds cannot be perplexed or frightened but go on in fortune or misfortune at their own private pace.... " 
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Post by TonyDunkley on Apr 26, 2019 18:25:24 GMT
If your boat is 33 years old and that tube is the original, then it's already well into the 'borrowed time' phase of it's reasonable life expectancy. Well, thanks, Tony, you have cheered me up no end. You wanted a definitive answer, and you got one ! For what it's worth, the first failures of the equivalent, rivetted in tubes, in all the Woolwich and Northwich built ex-GUCCCo motors began to happen in the late 1960's. All of those boats were built in the mid 1930's ! |
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Post by JohnV on Apr 26, 2019 18:27:30 GMT
If your boat is 33 years old and that tube is the original, then it's already well into the 'borrowed time' phase of it's reasonable life expectancy. Well, thanks, Tony, you have cheered me up no end. Get practicing your morse code Ross  |
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Post by Deleted on Apr 26, 2019 18:34:13 GMT
Well, thanks, Tony, you have cheered me up no end. You wanted a definitive answer, and you got one ! For what it's worth, the first failures of the equivalent, rivetted in tubes, in all the Woolwich and Northwich built ex-GUCCCo motors began to happen in the late 1960's. All of those boats were built in the mid 1930's ! Do you happen to know where the failure occurred? Presumably as they were riveted the actual item (elum tube) must have been a casting or a forged item as it would need to be flanged at least at the lower end. |
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Post by Deleted on Apr 26, 2019 18:37:03 GMT
Rudder stock. The tiller is what you clutch on to with a vice like grip while the one lung wonder throbs away for all it's worth beneath your feet. An Ellum is an archaic term relating to old butty boats. Elum tube is the term used for motor narrow boats  Horse drawn and butty boats had the rudders mounted outboard so this tube did not exist. It does exist on steel motor narrow boats and is called the elum tube. Nah, I don't buy it - Ellum is a derivation of Helm. You are wandering into foxy random terminology territory. Infernal combustion Powered commercial narrow boats were (in the large part) actually built by ship builders remember And besides - if TonyDunkley calls it a rudder stock tube it's good enough for me (when referencing to narrow boats at any rate) |
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Post by metanoia on Apr 26, 2019 18:40:57 GMT
Elum tube is the term...…. where it goes through the uxter plate (inside the boat behind the weedhatch) can be a nasty moisture trap and result in corrosion and failure of the weld holding elum tube to the uxter plate (top of the swim). This is below water line in almost every case unless boat is unballasted or an unloaded workboat so failure would lead to a flooded engine bay and possibly sinking depending on bulkheads. Just when you need a man conversant in the Classics …. .....the Reynard is abandoned … |
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Post by TonyDunkley on Apr 26, 2019 18:45:46 GMT
You wanted a definitive answer, and you got one ! For what it's worth, the first failures of the equivalent, rivetted in tubes, in all the Woolwich and Northwich built ex-GUCCCo motors began to happen in the late 1960's. All of those boats were built in the mid 1930's ! Do you happen to know where the failure occurred? Presumably as they were riveted the actual item (elum tube) must have been a casting or a forged item as it would need to be flanged at least at the lower end. The tubes were forgings, and the failures were down towards the bottom end of the tube i.w.o. the loaded waterline. The first one was during the '68 - '69 Winter on Willow Wren CTS's big Woolwich motor ''Dipper'' whilst breaking ice, loaded, on the North Oxford round Barby Turns. |
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Post by naughtyfox on Apr 26, 2019 18:49:37 GMT
Still no answers from anyone here on TB about whether they've had their 'rudder stock tubes' painted on the inside..... anyway, I have made notes and will investigate our situation in June.
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Post by Deleted on Apr 26, 2019 18:50:42 GMT
Re the GUCCCo boats was it rust forming between the uxter plate and the flange then expanding and popping a rivet?
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Post by Deleted on Apr 26, 2019 18:53:20 GMT
I worry about issues that are relevant. I think this is an interesting line of inquiry. It's not often people ask us if we have painted the inside of our tiller stock tube. It's not worth trying to paint the inside of that rudder stock tube because you won't be able to clean up and prepare the surface properly, so whatever paint you do manage to get on it will only be covering over rust and/or scale, and corrosion will continue behind the paint for the few weeks before it falls off anyway. I don't know how old your boat is, but if that tube is the original and the boat is around 20 years or more old, then it will almost certainly be getting very thin and close to failure in way of the normal waterline. It's not a maintainable part of the hull structure, . . . replacement of the tube or a new freestanding fuel tank are the only practical options you have. Still no answers from anyone here on TB about whether they've had their 'rudder stock tubes' painted on the inside..... anyway, I have made notes and will investigate our situation in June. Tony gave you the correct answer on page 1 - I've added it to this post as a gentle reminder. Save your energy for changing the oil - again 👍🤗 |
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Post by naughtyfox on Apr 26, 2019 18:58:56 GMT
Shouldn't we be worrying about suddenly releasing 250 litres of diesel into the canal / Great Ouse / River Nene?
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Post by TonyDunkley on Apr 26, 2019 18:58:58 GMT
Still no answers from anyone here on TB about whether they've had their 'rudder stock tubes' painted on the inside..... anyway, I have made notes and will investigate our situation in June. With the tube enclosed within the fuel tank you won't be able to get an accurate thickness reading to assess the percentage of wastage. |
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Post by naughtyfox on Apr 26, 2019 18:59:47 GMT
Yes, but painting it quickly might help. Or not. Oh dear.
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Post by Deleted on Apr 26, 2019 19:05:08 GMT
Shouldn't we be worrying about suddenly releasing 250 litres of diesel into the canal / Great Ouse / River Nene? A smear of tar on a badly prepared corroded surface isn't going to stop that happening. If you are that worried have a new tube fitted or as Tony says fit a separate fuel tank. It will take many more years for the original tank and hull plating to corroded through |
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" Quiet minds cannot be perplexed or frightened 
