
I forget which helicopter was offered to the Army and Navy that had a NOTAR system.
I think it was an MD 500 series aircraft similar to the AH/MH-6 Little Bird that the US Army's 160th SOAR uses. I don't think a Fenestron was used in this so-called Stealth Blackhawk, because of the fairing attached to the trail rotor system looks like it houses a normal tail rotor gearbox. I can't get any sort of information from my friends in the 160th, but my guess is that this aircraft is a highly modified H-60/S-70 airframe. If it was a completely new design, I believe something more along the lines of the RAH-66 would have been used, like the Fenestron system you mentioned.