T - 51b power armor ( Fallout 3 ) T - 51b powered armor is a later form of power armor and represented the peak of armored infantry technology before the Great War . In " Fallout 3 " , the T - 51b power armor is a unique model of armor and can only be found in Fort Constantine . Background . The T - 51b was developed in the laboratories of the West Tek Research Facility . At the end of the Anchorage Reclamation in January 2077 , the armor had become standard issue for American soldier s in the Army ' s mechanized cavalry regiments . Characteristics . The armor is fitted with a back - mounted TX - 28 MicroFusion Pack which generates an output power of 60 , 000 Watts to power the HiFlo hydraulic systems built into the frame of the suit . Made of a poly - laminate composite , the outer shell of the T - 51b is lightweight and capable of absorbing over 2500 Joules of kinetic impact . The 10 - micron - thick silver ablative coating can reflect laser and other radiation emissions without damage to the composite subsurface , and the eyeslit for the helmet is made of bulletproof glass to protect the wearer from any projectiles . It also includes a recycling system that can convert human waste into drinkable water , enhancing survival . Location . The T - 51b armor is in Fort Constantine , sealed in a room that requires three keys from different locations . The first key needed is Ted Strayer ' s special key . Ted Strayer is located in Rivet City . There are four ways to get the key from him : paying him in caps , passing a hard Speech check and convincing him , pickpocketing the key from him , or threatening him ( requires 6 + Strength or the Toughness perk ) . The second key can be obtained from Dukov , located at Dukov ' s Place , which is a hotel building . There are numerous ways to obtain Dukov ' s key . Buying the key from him is one simple way . Another easy way to obtain his key is to convince him with the Black Widow perk if the Lone Wanderer is female . Alternatively , Fantasia , one of Dukov ' s girls , can be convinced with the Lady Killer perk if the player character is male . If the player character has a high Speech skill and convinces Cherry , Dukov ' s second female friend , to be brought to Rivet City , she will give up the key to the Lone Wanderer . Dukov can also be intimidated by them with a high Speech skill in order to obtain the key . The last key can be obtained from Dave , who can be found in his own settlement , the Republic of Dave . The Lone Wanderer can earn his trust with a Speech check , earning the name " Wasteland Ambassador " from Dave and presenting the key as a gift . There is also another Speech check with him if the player character fails to be the wasteland ' s ambassador . If lacking a high Speech skill , they can kill him and loot the key from his corpse ( gives negative karma ) . The power armor will be located in Fort Constantine ' s basement , behind three different doors . The first door requires Ted Strayer ' s key , which opens the fort ' s launch control bunker . The second door , which requires Dukov ' s key , opens the bomb storage . The last door , with Tara Fields ' corpse nearby , opens the room to the power armor with Dave ' s key .