from GeoPrac.net Monthly Newsletter #24 - 2011 April/May
http://geoprac.net/geonews-mainmenu-63/65-geologic-hazards/581-video-helicopter-based-rock-scaling-qsledgehammerq
There is a relatively new version of a video that came out in 2009 where the Norwegian Public Road Administration hired a helicopter to try to scale loose rock with a wrecking ball. This version has english subtitles explaining a few things, and also shows another technique they tried for scaling rock, water bombing!
http://geoprac.net/geonews-mainmenu-63/65-geologic-hazards/581-video-helicopter-based-rock-scaling-qsledgehammerq
There is a relatively new version of a video that came out in 2009 where the Norwegian Public Road Administration hired a helicopter to try to scale loose rock with a wrecking ball. This version has english subtitles explaining a few things, and also shows another technique they tried for scaling rock, water bombing!
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