did Sukhoi ever do any VTOL concepts?

[mithril]

pretty much self explanitory. did the Sukhoi design bureau ever do any VTOL jet concept's? i searched the forums and didn't find anything, but i might have missed something.

 

[hesham]

Hi Mithril,


of course it did,please see;


http://www.secretprojects.co.uk/forum/index.php/topic,5099.msg40496.html#msg40496

 

[mithril]

was the tail sitter the only one they did, or do they ever look at lift jet/fan or vectored thrust approaches?