4 | show | 2025| S4 | Official Clip - video Dailymotion

Witness amazing buildings, bridges, lifts, and other structures that pushed structural concrete engineering to the edge. | dHNzX2QyWkFBWlNPbkhr

Transcript

00:00How do they build that is back at Smithsonian Channel. It's a brand new

00:06season of big thrills and even bigger builds. It all starts on Sunday, July 27th

00:11at 9 with our biggest build ever, the International Space Station, the most

00:16complicated construction project in human history. Here's a sneak peek.

00:23On December 4th, 1998, the docking system is put to the test when NASA

00:29launches space shuttle Endeavour, carrying the central hub module for the

00:34International Space Station named Unity. The Russian module Zarya, which has a

00:40basic life support system and will provide initial guidance, power and

00:45propulsion for the space station, is already orbiting Earth. Now, the two have to be

00:50joined. But to do that, Unity first has to be moved out of the cargo bay and on to

00:58the shuttle's roof. The arm operator, Nancy Curry, she basically grabbed the

01:05Unity module where she positioned the module right above the orbiter docking

01:09system and then she positioned the arm to capture the free-flying Zarya, which is a

01:16challenge in itself to actually capture a free-flying vehicle with the arm.

01:21Traveling at 17,500 miles per hour, that seems like a bit of an understatement.

01:32But now, slowly and steadily, Nancy uses the arm to catch Zarya. The time has come to join

01:42the two modules. And it's not going to be easy. Docking mechanisms require kinetic energy to capture using

01:52the momentum of two vehicles, essentially smashing together. But the arm is not good at providing

02:00high-speed momentum because it's, I guess, the way to look at it is when it maneuvers payloads in free space,

02:05it moves those in a very slow and methodical manner. So there is a basic incompatibility between the two systems.

02:14This was a cause of concern for mission control leading up to the mission.

02:18After many, many months of analyzing this particular situation, we came up with something that's known as SRMS

02:26assisted docking. So this is the way it works. This is kind of crazy. Sorry.

02:36The new season of How Did They Build That? Premieres Sunday, July 27th at 9 on Smithsonian Channel.

02:43And catch all of your favorite builds from past seasons.

02:46It's totally different from anything around it.

02:49This building does not make sense.

02:51Streaming now on Paramount+.