Brotherhood T-51b Power Armor

The  is a piece of armor in Fallout: New Vegas.

Characteristics
It provides a damage threshold of as well as a bonus of  to  and can be repaired with.

Locations
You can find all in Still in the Dark quest

Just outside the Nellis Air Force Base. You can find it while avoding the rockets that are flying at you.

You may also find the armor on the third floor of the Repconn building. You'll find two downed brotherhood of steel members, one under a fallen chunk of ceiling, the other against the wall. A few feet from Piers Isley's Briefcase.

You can also find 2 fallen brotherhood of steel members in a radioactive crater just outside of the hidden valley in the foothills. About 5 centaurs are in and around the crater including a bigger centaur called MOE.

Appearances
The appears in Fallout: New Vegas.