|
Post by kris on Dec 2, 2016 17:49:32 GMT
The logical extension of larger boats using less water is that there would come a point where a boat completely filling a lock would use no water at all. This is clearly not possible. no because to be a boat it has to float, otherwise it's a brick.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 17:52:57 GMT
Yes I know that been through 1000s of locks. Point is that this displacement of water by the boat is cancelled out during lock operation emptying or filling. The boat is simply floating on the water in the lock. It has not been put there from somewhere else (gates were open when it entered) therefore it can not make any difference its impossible.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 17:53:22 GMT
The logical extension of larger boats using less water is that there would come a point where a boat completely filling a lock would use no water at all. This is clearly not possible. no because to be a boat it has to float, otherwise it's a brick. Exactly
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 17:56:21 GMT
Yes I know that been through 1000s of locks. Point is that this displacement of water by the boat is cancelled out during lock operation emptying or filling. The boat is simply floating on the water in the lock. It has not been put there from somewhere else (gates were open when it entered) therefore it can not make any difference its impossible. No, your not going to shrink my brain with this ππππ
|
|
|
Post by JohnV on Dec 2, 2016 17:58:32 GMT
Interesting ..... let's go through it
empty lock no boat say 100 ton water full lock no boat say 200 ton of water therefore 100 ton of water used to fill lock
empty lock 20 ton boat 80 ton of water full lock 20 ton boat 180 ton of water therefore 100 ton of water used to fill lock
You're correct it doesn't matter what the size the boat is, the quantity of water is identical
Me wrong !!!
the amount of water used to raise or lower a lock is always the same !!!
|
|
|
Post by kris on Dec 2, 2016 18:01:32 GMT
So anyway back on topic how do widebeams use more water and therefore should pay a higher liscence fee?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 18:02:35 GMT
OK so if a boat completely filled a lock which was for example 72ft long x 14ft and the boat had a draught of 5ft.
The lock is 72ftx14ft and when empty has a depth of 4ft. This boat will not get through the lock. But... if the lock was 5ft+ deep when empty it would be able to get in the empty lock. Gates closed. Open paddles.
Don't forget the boat is 5ft deep. This means that it will have to be raised to a higher level than a boat drawing 2ft in order to get a level and open the gates.
It all cancels itself out as long as the boat is floating.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 18:03:39 GMT
So anyway back on topic how do widebeams use more water and therefore should pay a higher liscence fee? I think they are referring to square metres of canal surface area
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 18:04:47 GMT
It is also fallacious as the amount of water consumed is indirectly proportional to the tonnage in the lock ...... Oh dear, have I just shot myself in the foot ? That means yoghurt pots are probably the worst ! i agree with John, yogurt pots should pay more. Just because we all have to look at themπ Oi!! Just for you, a gratuitous picture of a petty GRP boat
|
|
|
Post by kris on Dec 2, 2016 18:05:20 GMT
So anyway back on topic how do widebeams use more water and therefore should pay a higher liscence fee? I think they are referring to square metres of canal surface area well they can just refere off
|
|
|
Post by kris on Dec 2, 2016 18:06:49 GMT
i agree with John, yogurt pots should pay more. Just because we all have to look at themπ Oi!! Just for you, a gratuitous picture of a petty GRP boat Β i don't mind them really, I'll get one when I can't cope with a proper boat anymore.π
|
|
|
Post by Delta9 on Dec 2, 2016 18:08:35 GMT
Let's say a full lock contains 200 tons of water. The same lock when "empty" (level with lower pound) contains 50 tons of water.
A 20 ton boat enters from the top pound and 20 tons of water moves from the lock to the top pound.
The lock now contains 180 tons of water and a 20 ton boat
The lock is drained until level with bottom pound. It know contains 30 tons of water and a 20 ton boat.
The boat leaves the lock and 20 tons of water flow in to the lock from the bottom pound.
150 tons of water have moved from top to bottom pound.
Now...
A 10 ton boat enters from the top pound and 10 tons of water moves from the lock to the top pound.
The lock now contains 190 tons of water and a 10 ton boat
The lock is drained until level with bottom pound. It know contains 40 tons of water and a 10 ton boat.
The boat leaves the lock and 10 tons of water flow in to the lock from the bottom pound.
150 tons of water have moved from top to bottom pound.
ETA: I type so slow John beat me to it.
|
|
|
Post by JohnV on Dec 2, 2016 18:10:25 GMT
Interesting ..... let's go through it empty lock no boat say 100 ton water full lock no boat say 200 ton of water therefore 100 ton of water used to fill lock empty lock 20 ton boat 80 ton of water full lock 20 ton boat 180 ton of water therefore 100 ton of water used to fill lock You're correct it doesn't matter what the size the boat is, the quantity of water is identical Me wrong !!! the amount of water used to raise or lower a lock is always the same !!! Agree D9 ....... but it meeded magnetman's post to make me think rather than jump to what seemed the obvious
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 18:10:51 GMT
Ref the OP
It will be interesting to see how this goes. It has been a long established arrangement that because boats over 7ft nominal beam have a limited cruising range that the license fee thing doesn't really present a problem.
Then you get the New Boat Co etc marketing wide beam narrow boats (wtf wide..narrow.. ??) as places to live and suddenly loads of then turn up.
This is when people get agitated. I went to a London waterways forum and I got the impression there are a lot of people agitated about widebeans and online moorings.
These people appear to have influence.
Not sure if this is an IWA twat problem ?
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Dec 2, 2016 18:13:33 GMT
Oi!! Just for you, a gratuitous picture of a petty GRP boat i don't mind them really, I'll get one when I can't cope with a proper boat anymore.π To be fair, they are all like women regardless of type:- fickle, hard work, expensive, temperamental, frustrating - it makes you wonder why we bother! Then, when you least expect it all comes together and works properly so you forget all the heartache that goes into the relationship
|
|