Liam Posted April 1, 2005 Report Share Posted April 1, 2005 Was that with four boats then?Daniel <{POST_SNAPBACK}> Yes, it was with 4 boats. My boat, which is 30ft, and my parents boat, 38ft - Not sure the length of the other boats, but they weren't long. Link to comment Share on other sites More sharing options...
Richard Lacy Posted April 1, 2005 Report Share Posted April 1, 2005 Yes, it was with 4 boats. My boat, which is 30ft, and my parents boat, 38ft - Not sure the length of the other boats, but they weren't long. <{POST_SNAPBACK}> Ah right I understand - theoretically you could do it with half a dozen boats if they were all tiddlers - however what i meant was if the boats were all full length 70 footers it would only be possible to have 2 up , 1 down or vice a versa. Link to comment Share on other sites More sharing options...
DHutch Posted April 1, 2005 Report Share Posted April 1, 2005 If the boats were all full length 70 footers it would only be possible to have 2 up , 1 down or vice a versa. Yeah, thats true. Ive seen it done with some priity large boats, i think a 70, two 60 and a 40 could do it. - As i say, there was a thread which had a link that detailed the procedure and the boat lenghts it was done with, and the where all that small. Daniel Link to comment Share on other sites More sharing options...
Guest Posted April 12, 2005 Report Share Posted April 12, 2005 (edited) - Can anyone find the old lock thread? becuase that had a link to how its done, and well as a link to a "virtual lock" <{POST_SNAPBACK}> Daniel Couldn't get anywhere with the search facility - Jon, can you help? This is the virtual lock though ('cos I saved it on my hard drive, to practice!) The Lock Game Peter Edited April 12, 2005 by Guest Link to comment Share on other sites More sharing options...
DHutch Posted April 12, 2005 Report Share Posted April 12, 2005 Couldn't get anywhere with the search facility - Jon, can you help? No, i did look breifly before and couldnt find it eather. - That the "lock game" alright. - Maybe if you searched to the url. Daniel Link to comment Share on other sites More sharing options...
DHutch Posted April 12, 2005 Report Share Posted April 12, 2005 Here we go! Double Staircase Locks Must sleep now (nearly one o clock, just finished my physiscs coursework!) Link to comment Share on other sites More sharing options...
jmj Posted April 14, 2005 Report Share Posted April 14, 2005 Surely you just operate a one-up, one-down, system. For a narrow staircase... I think that 1 up 1 down uses least water (I'd have to work through it to be sure about this) but a few up a few down gets the most boats through per hour. If it's quiet, the 1+1 makes sense, but if it's busy 3+3 is better. Imagine 1 and 1 on Foxton. Say it takes 1 min to get through each and they fill as fast as they empty (just to make the maths easier). After 5 mins 1 boat has gone down. After 10 mins 1 down and one up After 70 mins 7 down and 7 up Now do 3 and 3. 5 mins 1 down (plus 1 that is 4 locks down and 1 three down) 6 mins 2 down (plus 1, now 4 locks down) 7 mins 3 down then start going up 12 mins 1 up (plus 2 part way) 13 mins 2 up (plus 1 part way) 14 mins 3 up After 70 mins 15 down and 15 up So after 70 minutes 3 + 3 gives more than twice as many boats through, so that's why it's done that way. In fact letting all the boats down followed by all the boats up uses the minimum total time, but if your stuck in the queue while 100 boats come the other way you'd be a bit miffed, so 3+3 must have been settled on as a compromise. Link to comment Share on other sites More sharing options...
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