I share with you some pictures of the impressive K-7 aircraft designed in the Soviet Union in the interwar period as heavy bomber but did not go into production. Visit the link below, see the collection of pictures and leave there your opinion or comment: Do you think the K-7 would succeed in his mission as a bomber? http://aviacaoemfloripa.blogspot.com.br/2011/01/o-gigante-russo.html Best Regards!