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Post by Deleted on Aug 7, 2020 10:12:05 GMT
Have you got a windlass suitable for Ashline Lock? I have pointed this out twice already. What is so special about this 'key'? And why even have a lock that needs a special key? Click on the CWDF link I posted. It is to stop the kids emptying Kings Dyke into the River Nene Old Course - it is a brilliant anti-vandal measure that works beautifully.
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Post by Deleted on Aug 7, 2020 10:14:34 GMT
I've more than a couple of those kicking about now
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Post by Deleted on Aug 7, 2020 10:16:13 GMT
I seem to remember they were tapered though rather than a square. I know the square is cheaper to fabricate as you just use box section but I think the spindles were tapered.
It was early 00s when we got to St Ives and back (GU) on our narrow boats so a lot of water under the bridge since then!
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Post by Deleted on Aug 7, 2020 10:21:29 GMT
I seem to remember they were tapered though rather than a square. I know the square is cheaper to fabricate as you just use box section but I think the spindles were tapered. It was early 00s when we got to St Ives and back (GU) on our narrow boats so a lot of water under the bridge since then! The Spindle is indeed tapered, early ones are tapered to match, the current bunch are just box section but still work well enough. They take about fifty billion turns to wind up and down, the slackers fill and empty slowly too.
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Post by Deleted on Aug 7, 2020 10:24:40 GMT
I dislike using the wrong item. If the spindle is tapered it seems wrong to not use a tapered key. Much more serious obviously on canal locks as the taper is a security feature to encourage the key to stay on under load rather than flapping around.
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Post by Deleted on Aug 7, 2020 10:29:34 GMT
I dislike using the wrong item. If the spindle is tapered it seems wrong to not use a tapered key. Much more serious obviously on canal locks as the taper is a security feature to encourage the key to stay on under load rather than flapping around. There is no fear of anything flying off those bloody slackers! Operating them at 90Β° to a conventional paddle is counter intuitive too.
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Post by Deleted on Aug 7, 2020 10:32:28 GMT
What's the weed like these days?
Aquatic stuff.
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Post by Andyberg on Aug 7, 2020 10:40:54 GMT
so a lot of water under the bridge since then! Actually, not quite as much as you might think...π If an average single lock of say 74ft, displaces 140000 litres of water in one operation, its a fair estimate that an average bridge of approximately 18ft in length, would contain 35000 litres of water. However, in all probability, a Standard lock is at least twice as deep as a canal cutting, so we can safely half that amount to 17500 litres of water contained under the bridge. Given there is very little water movement to the canal, say 10% so no discernable fluctuation, I give it to you that theres probably only been around 15000 litres (or 3300 gallons) of water under said bridge since then, which, given theres over 2000 miles of canal in the UK means your above presumption actually amounts to 10 / 10ths of fuck all In the whole scheme of things! π Idiot!π (All figures given are approximations and quite probably complete & utter bollox!)
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Post by Deleted on Aug 7, 2020 11:39:41 GMT
I did not specify the bridge in my report. Porsche driver!
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Post by naughtyfox on Aug 7, 2020 11:43:53 GMT
I have pointed this out twice already. What is so special about this 'key'? And why even have a lock that needs a special key? Click on the CWDF link I posted. Noted and clicked!
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Post by Andyberg on Aug 7, 2020 13:11:15 GMT
I did not specify the bridge in my report. Which actual bridge makes no real difference to the end result! π If we use the actual number of bridges in the UKβs road network as an example (substantially more than on our canal network!) of 74000 bridges and times that by an average 18 foot Length, that still only gives us 133000 foot (Or 225 miles) of canal water under bridges. Again, Given theres over 2000 mile of UK canals, Using the above wildly optimistic bridge figure and including every single bridge in the network, this still only gives 1 / 10th of the total amount of UK canal water underneath! So, back to your original comment, I reiterate...Not much water has actually passed under βtheβ bridge!π Double Idiot! ππ
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Post by Deleted on Aug 7, 2020 13:14:23 GMT
What if it was Henley bridge?
200 cumecs during moderate winter flooding on the Thames there. Can easily be more.
That is in fact 200 tonnes of water per second.
Despite having a first in maths at Cambridge some years ago I can't quite get into the enormity of the figures involved.
Let's just say it is "a lot of water".
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Post by Deleted on Aug 7, 2020 13:16:07 GMT
And if it were geo-referenced I think you might find that the middle level link has active water movement although not much..
Porsche driving Huawei facilitator !
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Post by Andyberg on Aug 7, 2020 13:28:39 GMT
And if it were geo-referenced I think you might find that the middle level link has active water movement although not much.. Porsche driving Huawei facilitator ! I think we allowed for such an eventuality in the original calculations, as quoted below... π Given there is very little water movement to the canal, say 10% so no discernable fluctuation,
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Post by Deleted on Aug 7, 2020 13:30:39 GMT
I think you will have to check with @gazza but I have an idea that the middle level is primarily for water management and not a canal as such.
For this reason I would suggest that there has been water under the bridge, and just to really confuse you, in both directions in significant quantities !
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