Talk:Boat lift

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[edit] Stats in the table

Yes, I realize that the basins of the Peterborough and Longtan locks are almost the same size, yet the reported capacities differ by a factor of 5. Perhaps the chinese lock is reporting the largest expected vessel displacement, not the displacement of the basin? Anyhow, I am going to stick with the stats I found online, even if they are questionable...

I suspect that the Three Gorges capacity is the size of the basin, not the displacement of the vessels, because some sites report its capacity as 1500 ton barges... That project seems touched by boosterism. Originally the dam was not going to have conventional locks, just a mammoth ship lift capable of lifting 10,000 ton vessels. It is not always clear whether the stats are in metric tons, long tons or short tons. -- Geo Swan 04:06, 22 February 2006 (UTC)

I just did the arithmetic. One liter of water weighs one kilogram. One cubic metre of water weighs 1,000 kilograms, a "metric ton". Using the stats for the dimensions of the Three Gorges dam the volume of the basin would be 49,000 cubic metres -- ie. 49,000 tons. I suspect that someone in China, or the person who added the stats about the three gorges basin size (that would be me) made a mistake, and put the capacity of the old-fashioned Three Gorges locks.
The volume of the Ontario basins would be 906 cubic metres, not the 1300 tons(or 1542 tons) claimed; the Longtan dam lock would be 777 cubic metres about three times the size of vessels it is said to be able to handle. The Alderton would be 312 cubic metres, 1.25 times the claimed capacity. -- Geo Swan 04:26, 22 February 2006 (UTC)

Daan Oranje 06:44, 31 December 2006 (UTC) The above would be true if the lifts were filled with water only. However, a ship floats due to the fact that it, with cargo included, is lighter than water. The actual water content is reduced with the displacement of the ship. The average weight of the lift content is therefor considerably less than calculated above and, in fact, depends on the displacement of the ship in transit, as well as the minimum waterheight required to keep the ship balanced.

LoL. Pull the other one. -- Geo Swan 05:04, 30 January 2007 (UTC)

[edit] Krasnoyarsk - boat lift or inclined plane?

The image gallery on the external link Krasnoyarsk hydroelectric dam boat lift shows that the structure is a canal inclined plane, not a boot lift. I propose to move all info regarding Krasnoyarsk to that page. K. Roose

You're right, I moved it to canal inclined plane. Markussep 15:56, 10 March 2007 (UTC)

[edit] Three Gorges Dam - boat lift or lock?

The image Image:Three gorges dam locks view from vantage point.jpg on Wikipedia Commons clearly shows that this is a lock. I propose that all references to the Gorges dam are removed from the boat lift page. K. Roose


They are locks, and also boatlifts.Jeff 21:13, 29 January 2007 (UTC)

[edit] Ambiguity in term

I have noticed the frequent use of the term Boat Lift to mean the cushion or platform for lifting boats for maintenance purposes.

I therefore feel there is a need for a disambiguation link for the term on this page.

Sidnarayan (talk) 20:55, 21 May 2008 (UTC)

Can you cite examples of this usage? Mayalld (talk) 21:09, 21 May 2008 (UTC)
282 U.S. patents have been granted for these devices! [1]--Old Moonraker (talk) 21:23, 21 May 2008 (UTC)
This is one of the many websites referring to the other (and I think more popular) use of this term.
http://boat-lift-usa.com/boat-lift-types.htm
The term Ship-Lift seems to be a better title for this page, in my opinion
Sidnarayan (talk) 13:12, 23 May 2008 (UTC)