Talk:Parbuckle salvage

Help from experienced parbucklers

This article could use some work by an expert. It mostly talks about righting ships, but also talks about casks and 16-inch shells, and has a diagram showing a cask. I'm left wondering whether the cables pass under the ship, as in the cask diagram. I don't think so. Kendall-K1 (talk) 13:05, 17 September 2013 (UTC)

I copyedited the recent insertion about 16-shells, but have no knowledge of the procedure described. It would be helpful to get input from someone who's seen it and also from those with info re what era of battleships employed parbuckling this way, what are the origins of parbuckling as used for moving large objects around on vessels, etc. Eric ^talk 13:14, 17 September 2013 (UTC)

I removed the comment about the 16-inch shells. Though true (see here) it is not germane to salvage. The most common meaning of "parbuckle" comes from rolling something (cask, barrels, bodies etc.) up an incline. Somewhere along the line that got appropriated into parbuckling. It's included to introduce the mechanical advantage discussion. user:JMOprof ©¿©¬ 17:25, 17 September 2013 (UTC)

In the case of the Costa Concordia chains passed underneath the ship, from Giglo to the port side. See the Holdback discussion. user:JMOprof ©¿©¬ 17:28, 17 September 2013 (UTC)

That was my initial temptation with the shell bit, but I wanted to let someone with more savvy have a crack at it. Thanks, Professor! Eric ^talk 20:05, 17 September 2013 (UTC)

Sponsons or caissons?

What we refer to in the article as sponsons don't appear to be being used the way the first part of the relevant article describes the concept - as a solid permanent projection that adds stability. The project page sometimes refers to them as caissons, which as watertight temporary structures out of which water is pumped seems to me to be the more apposite term - although the water is pumped in in this case. Yngvadottir (talk) 01:07, 18 September 2013 (UTC)

The press kit uses "sponsons" and I believe it is correct. In their final use, they will be like "water wings" to float the ship away. Sponsons are attached to the ship, caissons are attached to the river or sea bed. user:JMOprof ©¿©¬ 13:36, 24 September 2013 (UTC)

Illustrations

I think that the current barrel diagram would sit better beside the mechanical advantage & difficulties section, with a clearer photo of an actual barbuckle salvage as the lead image. Unfortunately, the Costa Concordia images do not very show the principle very well. The most visually attractive one is the left-hand one of the Oklahoma set - it's place could perhaps be taken by this one. Davidships (talk) 19:32, 14 July 2014 (UTC)

Hi David -- thanks. I'll take that for action. First step will be to resubmit the image you found to remove its complicating caption. Naval History & Heritage Command images come that way, so I'll do that too. Check back in a few days. ...best, user:JMOprof ©¿©¬ 21:24, 14 July 2014 (UTC)

 Done The caption had already been removed over at Wikicommons. I put the images in chronological order. user:JMOprof ©¿©¬ 14:25, 15 July 2014 (UTC)

Thanks for taking that on, JMOprof. Looks better now. Davidships (talk) 22:04, 15 July 2014 (UTC)