How can I set encoding in gnome-terminal

hello!

I want to set in my gnome-terminal "ru_RU.KOI8-R" encoding, but I don't know how. Does anybody know how can I
do this?
Today, if I print "locale" in gnome-terminal, I can see 

LANG=ru_RU.UTF-8
LC_CTYPE="ru_RU.UTF-8"
LC_COLLATE="ru_RU.UTF-8"
LC_TIME="ru_RU.UTF-8"
LC_NUMERIC="ru_RU.UTF-8"
LC_MONETARY="ru_RU.UTF-8"
LC_MESSAGES="ru_RU.UTF-8"
LC_ALL=