T-45d power armor

The T-45d power armor was the first version of power armor to be successfully deployed in battle by the United States in 2067 during the Sino-American War.

Originally developed and manufactured for the United States Army by American defense contractor West Tek, it is currently employed by several factions, including the Brotherhood of Steel and the Brotherhood Outcasts. Each of these factions have their own variants of power armor.

Background
In 2067, the first suit of T-45d power armor was deployed in Alaska during the start of the Anchorage Reclamation in the midst of the Sino-American War. This power armor was incredibly effective against Chinese tanks and infantry. Its ability to allow a single infantryman to carry heavy ordinance that otherwise required a team of soldiers to transport and operate became key in various localized conflicts on the Alaskan front, and it allowed American soldiers wearing the armor to destroy entire towns occupied by Chinese troops without endangering themselves. In 2076, the more advanced T-51b power armor variant was introduced into combat duty.

After the Great War, this model of power armor is still being used by factions such as the Brotherhood of Steel. While main forces of the Brotherhood in the Core Region and the Mojave Brotherhood of Steel tend to use the newer T-51b, more remote chapters, such as the Brotherhood of Steel and the Brotherhood Outcasts, have to rely on these outdated suits.

Design
The T-45d lacks the mobility of later power armor models (such as the T-51b power armor) because of its less advanced servo design; as a result it limits the wearer's agility. The first version of T-45d power armor deployed on the front lines against the Chinese was powered by small energy cells and it burned through them at an alarming rate.

While the T-45d armor is similar in its overall shape to the more advanced T-51b power armor, it is significantly less advanced than its later counterpart, and uses riveted steel plates instead of plastic composite materials in its construction. Various electronic and mechanical subsystems of the armor are exposed on the outside of its casing rather than sealed within as in the T-51b, making it far more susceptible to damage. In addition, a specialized body suit is required to be worn underneath the T-45d's armored shell in order to facilitate linking the armor's servos to the wearer's own motions and to make the armor more bearable because of its heat dissipation problems.

This suit of armor also has a handle on the higher part of the chestplate, which might have been used for such purposes as storing the armor on special armor racks, or carrying an injured or killed soldier back to friendly lines to prevent capture of either the armor or soldier by the enemy.

Power armor
T-45d suits were discovered by the Brotherhood of Steel in the ruins of the Pentagon and were extensively used by Brotherhood Knights and Paladins, along with modifications and makeshift repairs. There are a few variations in terms of coloring and other decorations.

Lyons Pride issue power armor
This power armor is obtained by savaging off a dead pride member at the Galaxy News Radio studio. The other way to get it is when Sentinel Lyons asks you if you would like to obtain a set before the big battle against the Enclave. Lyons Pride armor can be differentiated by some of the designs on it, and if you notice the ring shapes up towards the shoulders. This armor can give you only a little bonus in damage resistance. In Fallout New Vegas you may obtain the T45d power armor by assisting the BoS, they will offer you power armor that you may wear with training, also you may find this armor in the Brotherhood of Steel safehouse.

Linden's Outcast power armor
A unique Outcast power armor obtained as a quest reward for completing the quest Oasis in Leaf Mother Laurel's favor.

Prototype medic power armor
This is a variation of the US Army's power armor and can only be found in the Old Olney sewers. This suit automatically applies Med-X and can alert you about threats in the area.

Ashur's power armor
Ashur's power armor is a unique version of the tribal power armor and is only found with The Pitt add-on. It is worn by Ashur, leader of the Pitt.

Tribal power armor
Tribal power armor is only found with The Pitt add-on. It can be acquired by giving 100 steel ingots to Everett for the unmarked quest Mill Worker.

Behind the scenes

 * The history of the T-45d was mentioned in the Fallout Bible timeline, while its designation was first mentioned in the Van Buren tech demo by Corporal Armstrong who wears the armor. The armor itself is ubiquitous in the Capital Wasteland, and the Museum of Technology has a log of proposed exhibits for 2078, which includes a suit of T-45d power armor.
 * According to the Fallout 3 art book, the power armor was designed directly in 3D, skipping the concept art phase.
 * A texture for a pink power armor can be found in the "Fallout - Textures.bsa" file. It has a white heart on its chest.

Quotes

 * "Though that design was intended for the "real" F3 power armor (T-51b), we wanted to have an alternate texture for the armor Armstrong describes, T-45d, which ran off small energy cells. It would only have appeared in the tutorial as a "back in the day" detail." - J.E. Sawyer, describing Van Buren

Gallery
Pancerz Wspomagany T-45d Силовая броня T-45d