Chinooks also have them, as for taking off on grass with skis. Cannot see why not, they fly float planes off it.

See
Floats no wheels

http://m.youtube.com/watch?v=Z3bY3-o1fmk

http://m.youtube.com/watch?feature=related&v=fNWL7NlSS94

Taking off

http://m.youtube.com/watch?v=aVqs5qZJkc8

If for take off they don’t have wheels they use a trailer behind a truck and take off from that.