Challenge accepted: I wasn't able to tease out a number more specific than "up to twice as efficient" here http://jalopnik.com/5490236/the-nuclear-warhead+equi

Challenge accepted: I wasn't able to tease out a number more specific than "up to twice as efficient" here http://jalopnik.com/5490236/the-nuclear-warhead+equipped-ekranoplan-soviet-invasion-machine http://jalopnik.com/5490236/the-nuclear-warhead+equipped-ekr... but it might be decipherable in this PDF: http://ftp.rta.nato.int/public/pubfulltext/rto/mp/rto-mp-015/$MP-015-24.PDF http://ftp.rta.nato.int/public/pubfulltext/rto/mp/rto-mp-015... A couple of sources said such a plane can fly up to a few hundred feet up. And another talked about a yacht using WIG: http://www.yachtboutique.com/Designers/Ekranoplan/Ekranoplanintro.htm http://www.yachtboutique.com/Designers/Ekranoplan/Ekranoplan...