it is an A-90 Orlyonok, Ekranoplan [a boat which flies].

More at; http://www.pbase.com/keithcollicoat/image/87430069
https://en.wikipedia.org/wiki/A-90_Orlyonok
There is a good video at; https://www.youtube.com/watch?v=AHcxmZ0qI7Y